def test_init(self):
filepath = self.TEST_FILES_DIR / "POSCAR"
poscar = Poscar.from_file(filepath, check_for_POTCAR=False)
comp = poscar.structure.composition
self.assertEqual(comp, Composition("Fe4P4O16"))
# Vasp 4 type with symbols at the end.
poscar_string = """Test1
1.0
3.840198 0.000000 0.000000
1.920099 3.325710 0.000000
0.000000 -2.217138 3.135509
1 1
direct
0.000000 0.000000 0.000000 Si
0.750000 0.500000 0.750000 F
"""
poscar = Poscar.from_string(poscar_string)
self.assertEqual(poscar.structure.composition, Composition("SiF"))
poscar_string = ""
self.assertRaises(ValueError, Poscar.from_string, poscar_string)
# Vasp 4 tyle file with default names, i.e. no element symbol found.
poscar_string = """Test2
1.0
3.840198 0.000000 0.000000
1.920099 3.325710 0.000000
0.000000 -2.217138 3.135509
1 1
direct
0.000000 0.000000 0.000000
0.750000 0.500000 0.750000
"""
with warnings.catch_warnings():
warnings.simplefilter("ignore")
poscar = Poscar.from_string(poscar_string)
self.assertEqual(poscar.structure.composition, Composition("HHe"))
# Vasp 4 tyle file with default names, i.e. no element symbol found.
poscar_string = """Test3
1.0
3.840198 0.000000 0.000000
1.920099 3.325710 0.000000
0.000000 -2.217138 3.135509
1 1
Selective dynamics
direct
0.000000 0.000000 0.000000 T T T Si
0.750000 0.500000 0.750000 F F F O
"""
poscar = Poscar.from_string(poscar_string)
self.assertEqual(
poscar.selective_dynamics, [[True, True, True], [False, False, False]]
)
self.selective_poscar = poscar
def test_init(self):
filepath = os.path.join(test_dir, 'POSCAR')
poscar = Poscar.from_file(filepath,check_for_POTCAR=False)
comp = poscar.structure.composition
self.assertEqual(comp, Composition("Fe4P4O16"))
# Vasp 4 type with symbols at the end.
poscar_string = """Test1
1.0
3.840198 0.000000 0.000000
1.920099 3.325710 0.000000
0.000000 -2.217138 3.135509
1 1
direct
0.000000 0.000000 0.000000 Si
0.750000 0.500000 0.750000 F
"""
poscar = Poscar.from_string(poscar_string)
self.assertEqual(poscar.structure.composition, Composition("SiF"))
poscar_string = ""
self.assertRaises(ValueError, Poscar.from_string, poscar_string)
# Vasp 4 tyle file with default names, i.e. no element symbol found.
poscar_string = """Test2
1.0
3.840198 0.000000 0.000000
1.920099 3.325710 0.000000
0.000000 -2.217138 3.135509
1 1
direct
0.000000 0.000000 0.000000
0.750000 0.500000 0.750000
"""
with warnings.catch_warnings():
warnings.simplefilter("ignore")
poscar = Poscar.from_string(poscar_string)
self.assertEqual(poscar.structure.composition, Composition("HHe"))
# Vasp 4 tyle file with default names, i.e. no element symbol found.
poscar_string = """Test3
1.0
3.840198 0.000000 0.000000
1.920099 3.325710 0.000000
0.000000 -2.217138 3.135509
1 1
Selective dynamics
direct
0.000000 0.000000 0.000000 T T T Si
0.750000 0.500000 0.750000 F F F O
"""
poscar = Poscar.from_string(poscar_string)
self.assertEqual(poscar.selective_dynamics, [[True, True, True],
[False, False, False]])
self.selective_poscar = poscar
def load_dielectric_constant(include_metadata=False):
"""
References:
Petousis, I., Mrdjenovich, D., Ballouz, E., Liu, M., Winston, D.,
Chen, W., Graf, T., Schladt, T. D., Persson, K. A. & Prinz, F. B.
High-throughput screening of inorganic compounds for the discovery of
novel dielectric and optical materials. Sci. Data 4, 160134 (2017).
Args:
include_metadata (bool): whether to return cif, meta, poscar
Returns (pd.DataFrame)
"""
df = pandas.read_csv(os.path.join(module_dir, "dielectric_constant.csv"),
comment="#")
df['cif'] = df['structure']
df['structure'] = pandas.Series(
[Poscar.from_string(s).structure for s in df['poscar']])
new_columns = [
'material_id', 'formula', 'nsites', 'space_group', 'volume',
'structure', 'band_gap', 'e_electronic', 'e_total', 'n',
'poly_electronic', 'poly_total', 'pot_ferroelectric'
]
if include_metadata:
new_columns += ['cif', 'meta', 'poscar']
return df[new_columns]
def __init__(self, structure, data, dos=None, vbm=None, cbm=None):
"""
Arguments:
structure (pymatgen.core.structure.Structure): crystal structure
data: Whatever data is stored
dos (pymatgen.electronic_structure.dos.DOS or list, None): A pymatgen
density of states or a list containing: 1) energies, 2) density
of states values at those energies, 3) the Fermi level.
vbm (float, None): valence band maximum
cbm (float, None): conduction band minimum
"""
if type(structure) == str:
structure = Poscar.from_string(structure).structure
if dos is None:
self.energies = None
self.densities = None
self.efermi = None
elif type(dos) == list:
self.energies = dos[0]
self.densities = dos[1]
self.efermi = dos[2]
else:
self.energies = dos.energies
self.densities = (dos.densities[Spin.up] +
dos.densities[Spin.down]) / 2
self.efermi = dos.efermi
self.structure = structure
self.data = data
self.cbm = cbm
self.vbm = vbm
if (not (cbm is None)) and (not (vbm is None)):
self.bandgap = max(0, cbm - vbm)
else:
self.bandgap = None
def Read_POSCARS(filename):
"""
Read POSCARS in a single file and convert it to Pymatgen structure object
"""
# Read INPUT file
Struc = []
f = open(filename, 'rb')
input_content = f.readlines()
f.close()
POSCAR_content = []
N_atom = 0
for str1 in input_content:
POSCAR_content.append(str(str1, 'utf-8'))
if len(POSCAR_content) == 7:
N_atom = sum(int(f) for f in str1.split())
elif len(POSCAR_content) == 8 + N_atom:
pos_str = ''.join(POSCAR_content)
try:
p = Poscar.from_string(pos_str)
Struc.append(p.structure)
except:
print('strucuture is wrong', pos_str)
raise
POSCAR_content = []
return Struc
def load_elastic_tensor(include_metadata=False):
# ref: Jong, M. De, Chen, W., Angsten, T., Jain, A., Notestine, R., Gamst,
# A., Sluiter, M., Ande, C. K., Zwaag, S. Van Der, Plata, J. J., Toher,
# C., Curtarolo, S., Ceder, G., Persson, K. a & Asta, M. Charting the
# complete elastic properties of inorganic crystalline compounds. Sci.
# Data 2, 150009 (2015).
df = pandas.read_csv(os.path.join(module_dir, "elastic_tensor.csv"),
comment="#")
for i in list(df.index):
for c in [
'compliance_tensor', 'elastic_tensor',
'elastic_tensor_original'
]:
df.at[(i, c)] = np.array(ast.literal_eval(df.at[(i, c)]))
df['cif'] = df['structure']
df['structure'] = pandas.Series(
[Poscar.from_string(s).structure for s in df['poscar']])
new_columns = [
'material_id', 'formula', 'nsites', 'space_group', 'volume',
'structure', 'elastic_anisotropy', 'G_Reuss', 'G_VRH', 'G_Voigt',
'K_Reuss', 'K_VRH', 'K_Voigt', 'poisson_ratio', 'compliance_tensor',
'elastic_tensor', 'elastic_tensor_original'
]
if include_metadata:
new_columns += ['cif', 'kpoint_density', 'poscar']
return df[new_columns]
def load_piezoelectric_tensor(include_metadata=False):
"""
References:
de Jong, M., Chen, W., Geerlings, H., Asta, M. & Persson, K. A.
A database to enable discovery and design of piezoelectric materials.
Sci. Data 2, 150053 (2015)
Args:
include_metadata (bool): whether to return cif, meta, poscar
Returns (pd.DataFrame)
"""
df = pandas.read_csv(os.path.join(module_dir, "piezoelectric_tensor.csv"),
comment="#")
for i in list(df.index):
c = 'piezoelectric_tensor'
df.at[(i, c)] = np.array(ast.literal_eval(df.at[(i, c)]))
df['cif'] = df['structure']
df['structure'] = pandas.Series(
[Poscar.from_string(s).structure for s in df['poscar']])
new_columns = [
'material_id', 'formula', 'nsites', 'point_group', 'space_group',
'volume', 'structure', 'eij_max', 'v_max', 'piezoelectric_tensor'
]
if include_metadata:
new_columns += ['cif', 'meta', 'poscar']
return df[new_columns]
def get_prim_struct(structure):
"""
Get standard primitive
"""
output = run_aconvasp_command(["aconvasp", "--std_prim"], structure)
if "ERROR" in output[1]:
raise AconvaspError(output[1])
tmp = Poscar.from_string(output[0])
return {'struct': tmp.structure, 'comm': tmp.comment}
def get_prim_struct(structure):
"""
Get standard primitive
"""
output = run_aconvasp_command(["aconvasp", "--std_prim"], structure)
if "ERROR" in output[1]:
raise AconvaspError(output[1])
tmp = Poscar.from_string(output[0])
return {"struct": tmp.structure, "comm": tmp.comment}
def get_conv_struct(structure):
"""
Get a minkowski reduced structure
"""
output = run_aconvasp_command(["aconvasp", "--std_conv"], structure)
if "ERROR" in output[1]:
raise AconvaspError(output[1])
tmp = Poscar.from_string(output[0])
return {"struct": tmp.structure, "comm": tmp.comment}
def get_conv_struct(structure):
"""
Get a minkowski reduced structure
"""
output = run_aconvasp_command(["aconvasp", "--std_conv"], structure)
if "ERROR" in output[1]:
raise AconvaspError(output[1])
tmp = Poscar.from_string(output[0])
return {'struct': tmp.structure, 'comm': tmp.comment}
def _get_structures(self, num_structs):
structs = []
rs = subprocess.Popen(
[makestr_cmd, "struct_enum.out",
str(0),
str(num_structs - 1)],
stdout=subprocess.PIPE,
stdin=subprocess.PIPE,
close_fds=True)
rs.communicate()
if len(self.ordered_sites) > 0:
original_latt = self.ordered_sites[0].lattice
# Need to strip sites of site_properties, which would otherwise
# result in an index error. Hence Structure is reconstructed in
# the next step.
ordered_structure = Structure(
original_latt,
[site.species_and_occu for site in self.ordered_sites],
[site.frac_coords for site in self.ordered_sites])
inv_org_latt = np.linalg.inv(original_latt.matrix)
for n in range(1, num_structs + 1):
with open("vasp.{:06d}".format(n)) as f:
data = f.read()
data = re.sub(r'scale factor', "1", data)
data = re.sub(r'(\d+)-(\d+)', r'\1 -\2', data)
poscar = Poscar.from_string(data, self.index_species)
sub_structure = poscar.structure
# Enumeration may have resulted in a super lattice. We need to
# find the mapping from the new lattice to the old lattice, and
# perform supercell construction if necessary.
new_latt = sub_structure.lattice
sites = []
if len(self.ordered_sites) > 0:
transformation = np.dot(new_latt.matrix, inv_org_latt)
transformation = [[int(round(cell)) for cell in row]
for row in transformation]
logger.debug("Supercell matrix: {}".format(transformation))
s = ordered_structure * transformation
sites.extend([site.to_unit_cell for site in s])
super_latt = sites[-1].lattice
else:
super_latt = new_latt
for site in sub_structure:
if site.specie.symbol != "X": # We exclude vacancies.
sites.append(
PeriodicSite(site.species_and_occu,
site.frac_coords,
super_latt).to_unit_cell)
structs.append(Structure.from_sites(sorted(sites)))
logger.debug("Read in a total of {} structures.".format(num_structs))
return structs
def _get_structures(self, num_structs):
structs = []
rs = subprocess.Popen(["makestr.x",
"struct_enum.out", str(0),
str(num_structs - 1)],
stdout=subprocess.PIPE,
stdin=subprocess.PIPE, close_fds=True)
rs.communicate()
if len(self.ordered_sites) > 0:
original_latt = self.ordered_sites[0].lattice
# Need to strip sites of site_properties, which would otherwise
# result in an index error. Hence Structure is reconstructed in
# the next step.
ordered_structure = Structure(
original_latt,
[site.species_and_occu for site in self.ordered_sites],
[site.frac_coords for site in self.ordered_sites])
inv_org_latt = np.linalg.inv(original_latt.matrix)
for n in range(1, num_structs + 1):
with open("vasp.{:06d}".format(n)) as f:
data = f.read()
data = re.sub("scale factor", "1", data)
data = re.sub("(\d+)-(\d+)", r"\1 -\2", data)
poscar = Poscar.from_string(data, self.index_species)
sub_structure = poscar.structure
#Enumeration may have resulted in a super lattice. We need to
#find the mapping from the new lattice to the old lattice, and
#perform supercell construction if necessary.
new_latt = sub_structure.lattice
sites = []
if len(self.ordered_sites) > 0:
transformation = np.dot(new_latt.matrix, inv_org_latt)
transformation = [[int(round(cell)) for cell in row]
for row in transformation]
logger.debug("Supercell matrix: {}".format(transformation))
s = Structure.from_sites(ordered_structure)
s.make_supercell(transformation)
sites.extend([site.to_unit_cell for site in s])
super_latt = sites[-1].lattice
else:
super_latt = new_latt
for site in sub_structure:
if site.specie.symbol != "X": # We exclude vacancies.
sites.append(PeriodicSite(site.species_and_occu,
site.frac_coords,
super_latt).to_unit_cell)
structs.append(Structure.from_sites(sorted(sites)))
logger.debug("Read in a total of {} structures.".format(num_structs))
return structs
def test_str(self):
si = 14
coords = list()
coords.append([0, 0, 0])
coords.append([0.75, 0.5, 0.75])
# Silicon structure for testing.
latt = [
[3.8401979337, 0.00, 0.00],
[1.9200989668, 3.3257101909, 0.00],
[0.00, -2.2171384943, 3.1355090603],
]
struct = Structure(latt, [si, si], coords)
poscar = Poscar(struct)
expected_str = """Si2
1.0
3.840198 0.000000 0.000000
1.920099 3.325710 0.000000
0.000000 -2.217138 3.135509
Si
2
direct
0.000000 0.000000 0.000000 Si
0.750000 0.500000 0.750000 Si
"""
self.assertEqual(str(poscar), expected_str, "Wrong POSCAR output!")
# Vasp 4 type with symbols at the end.
poscar_string = """Test1
1.0
-3.840198 0.000000 0.000000
1.920099 3.325710 0.000000
0.000000 -2.217138 3.135509
1 1
direct
0.000000 0.000000 0.000000 Si
0.750000 0.500000 0.750000 F
"""
expected = """Test1
1.0
3.840198 -0.000000 -0.000000
-1.920099 -3.325710 -0.000000
-0.000000 2.217138 -3.135509
Si F
1 1
direct
0.000000 0.000000 0.000000 Si
0.750000 0.500000 0.750000 F
"""
poscar = Poscar.from_string(poscar_string)
self.assertEqual(str(poscar), expected)
def test_automatic_kpoint(self):
# s = PymatgenTest.get_structure("Li2O")
p = Poscar.from_string("""Al1
1.0
2.473329 0.000000 1.427977
0.824443 2.331877 1.427977
0.000000 0.000000 2.855955
Al
1
direct
0.000000 0.000000 0.000000 Al""")
kpoints = Kpoints.automatic_density(p.structure, 1000)
self.assertArrayAlmostEqual(kpoints.kpts[0], [10, 10, 10])
def test_automatic_kpoint(self):
# s = PymatgenTest.get_structure("Li2O")
p = Poscar.from_string("""Al1
1.0
2.473329 0.000000 1.427977
0.824443 2.331877 1.427977
0.000000 0.000000 2.855955
Al
1
direct
0.000000 0.000000 0.000000 Al""")
kpoints = Kpoints.automatic_density(p.structure, 1000)
self.assertArrayAlmostEqual(kpoints.kpts[0], [10, 10, 10])
def test_str(self):
si = 14
coords = list()
coords.append([0, 0, 0])
coords.append([0.75, 0.5, 0.75])
# Silicon structure for testing.
latt = [[3.8401979337, 0.00, 0.00],
[1.9200989668, 3.3257101909, 0.00],
[0.00, -2.2171384943, 3.1355090603]]
struct = Structure(latt, [si, si], coords)
poscar = Poscar(struct)
expected_str = '''Si2
1.0
3.840198 0.000000 0.000000
1.920099 3.325710 0.000000
0.000000 -2.217138 3.135509
Si
2
direct
0.000000 0.000000 0.000000 Si
0.750000 0.500000 0.750000 Si
'''
self.assertEqual(str(poscar), expected_str, "Wrong POSCAR output!")
# Vasp 4 type with symbols at the end.
poscar_string = """Test1
1.0
-3.840198 0.000000 0.000000
1.920099 3.325710 0.000000
0.000000 -2.217138 3.135509
1 1
direct
0.000000 0.000000 0.000000 Si
0.750000 0.500000 0.750000 F
"""
expected = """Test1
1.0
3.840198 -0.000000 -0.000000
-1.920099 -3.325710 -0.000000
-0.000000 2.217138 -3.135509
Si F
1 1
direct
0.000000 0.000000 0.000000 Si
0.750000 0.500000 0.750000 F
"""
poscar = Poscar.from_string(poscar_string)
self.assertEqual(str(poscar), expected)
def test_cart_scale(self):
poscar_string = """Test1
1.1
3.840198 0.000000 0.000000
1.920099 3.325710 0.000000
0.000000 -2.217138 3.135509
Si F
1 1
cart
0.000000 0.00000000 0.00000000
3.840198 1.50000000 2.35163175
"""
p = Poscar.from_string(poscar_string)
site = p.structure[1]
self.assertArrayAlmostEqual(site.coords, np.array([3.840198, 1.5, 2.35163175]) * 1.1)
def test_cart_scale(self):
poscar_string = """Test1
1.1
3.840198 0.000000 0.000000
1.920099 3.325710 0.000000
0.000000 -2.217138 3.135509
Si F
1 1
cart
0.000000 0.00000000 0.00000000
3.840198 1.50000000 2.35163175
"""
p = Poscar.from_string(poscar_string)
site = p.structure[1]
self.assertArrayAlmostEqual(site.coords, np.array([3.840198, 1.5, 2.35163175]) * 1.1)
def get_minkowski_red(structure):
"""
Get a minkowski reduced structure
"""
output = run_aconvasp_command(["aconvasp", "--kpath"], structure)
started = False
poscar_string = ""
if "ERROR" in output[1]:
raise AconvaspError(output[1])
for line in output[0].split("\n"):
if started or line.find("KPOINTS TO RUN") != -1:
poscar_string = poscar_string + line + "\n"
if line.find("STRUCTURE TO RUN") != -1:
started = True
if line.find("KPOINTS TO RUN") != -1:
started = False
return Poscar.from_string(poscar_string).structure
def get_minkowski_red(structure):
"""
Get a minkowski reduced structure
"""
output = run_aconvasp_command(["aconvasp", "--kpath"], structure)
started = False
poscar_string = ""
if "ERROR" in output[1]:
raise AconvaspError(output[1])
for line in output[0].split("\n"):
if started or line.find("KPOINTS TO RUN") != -1:
poscar_string = poscar_string + line + "\n"
if line.find("STRUCTURE TO RUN") != -1:
started = True
if line.find("KPOINTS TO RUN") != -1:
started = False
return Poscar.from_string(poscar_string).structure
def test_to_from_dict(self):
poscar_string = """Test3
1.0
3.840198 0.000000 0.000000
1.920099 3.325710 0.000000
0.000000 -2.217138 3.135509
1 1
Selective dynamics
direct
0.000000 0.000000 0.000000 T T T Si
0.750000 0.500000 0.750000 F F F O
"""
poscar = Poscar.from_string(poscar_string)
d = poscar.as_dict()
poscar2 = Poscar.from_dict(d)
self.assertEqual(poscar2.comment, "Test3")
self.assertTrue(all(poscar2.selective_dynamics[0]))
self.assertFalse(all(poscar2.selective_dynamics[1]))
def _preprocess_dielectric_constant(df):
"""
Preprocessor used to convert the dielectric_constant dataset to the
dataframe desired for JSON conversion
Args:
df (pandas.DataFrame)
Returns: (pandas.DataFrame)
"""
df['cif'] = df['structure']
df['structure'] = pandas.Series([Poscar.from_string(s).structure
for s in df['poscar']])
new_columns = ['material_id', 'formula', 'nsites', 'space_group',
'volume', 'structure', 'band_gap', 'e_electronic',
'e_total', 'n', 'poly_electronic', 'poly_total',
'pot_ferroelectric', 'cif', 'meta', 'poscar']
return df[new_columns]
def test_to_from_dict(self):
poscar_string = """Test3
1.0
3.840198 0.000000 0.000000
1.920099 3.325710 0.000000
0.000000 -2.217138 3.135509
1 1
Selective dynamics
direct
0.000000 0.000000 0.000000 T T T Si
0.750000 0.500000 0.750000 F F F O
"""
poscar = Poscar.from_string(poscar_string)
d = poscar.as_dict()
poscar2 = Poscar.from_dict(d)
self.assertEqual(poscar2.comment, "Test3")
self.assertTrue(all(poscar2.selective_dynamics[0]))
self.assertFalse(all(poscar2.selective_dynamics[1]))
def from_poscar_string(poscar_string, transformations=None):
"""
Generates TransformedStructure from a poscar string.
Args:
poscar_string (str): Input POSCAR string.
transformations ([Transformations]): Sequence of transformations
to be applied to the input structure.
"""
p = Poscar.from_string(poscar_string)
if not p.true_names:
raise ValueError("Transformation can be craeted only from POSCAR "
"strings with proper VASP5 element symbols.")
raw_string = re.sub("'", "\"", poscar_string)
s = p.structure
source_info = {"source": "POSCAR",
"datetime": str(datetime.datetime.now()),
"original_file": raw_string}
return TransformedStructure(s, transformations, history=[source_info])
def from_poscar_string(poscar_string, transformations=None):
"""
Generates TransformedStructure from a poscar string.
Args:
poscar_string (str): Input POSCAR string.
transformations ([Transformations]): Sequence of transformations
to be applied to the input structure.
"""
p = Poscar.from_string(poscar_string)
if not p.true_names:
raise ValueError("Transformation can be craeted only from POSCAR "
"strings with proper VASP5 element symbols.")
raw_string = re.sub(r"'", "\"", poscar_string)
s = p.structure
source_info = {"source": "POSCAR",
"datetime": str(datetime.datetime.now()),
"original_file": raw_string}
return TransformedStructure(s, transformations, history=[source_info])
def _preprocess_piezoelectric_tensor(df):
"""
Preprocessor used to convert the piezoelectric_constant dataset to the
dataframe desired for JSON conversion
Args:
df (pandas.DataFrame)
Returns: (pandas.DataFrame)
"""
for i in list(df.index):
c = 'piezoelectric_tensor'
df.at[(i, c)] = np.array(ast.literal_eval(df.at[(i, c)]))
df['cif'] = df['structure']
df['structure'] = pandas.Series([Poscar.from_string(s).structure
for s in df['poscar']])
new_columns = ['material_id', 'formula', 'nsites', 'point_group',
'space_group', 'volume', 'structure', 'eij_max', 'v_max',
'piezoelectric_tensor', 'cif', 'meta', 'poscar']
return df[new_columns]
def test_poscar_string(kind):
base_structure = get_lattice(kind)
num_type = 2
index = 4
species = [Element("Cu"), Element("Au")]
se = StructureEnumerator(
base_structure,
index,
num_type,
species,
color_exchange=True,
remove_superperiodic=True,
)
list_ds_mg = se.generate(output="pymatgen")
list_ds_pc = se.generate(output="poscar")
assert len(list_ds_mg) == len(list_ds_pc)
for expect, poscar_str in zip(list_ds_mg, list_ds_pc):
actual = Poscar.from_string(poscar_str).structure
assert expect == actual
def _preprocess_elastic_tensor_2015(df):
"""
Preprocessor used to convert the elastic_tensor_2015 dataset to the
dataframe desired for JSON conversion
Args:
df (pandas.DataFrame)
Returns: (pandas.DataFrame)
"""
for i in list(df.index):
for c in ['compliance_tensor', 'elastic_tensor',
'elastic_tensor_original']:
df.at[(i, c)] = np.array(ast.literal_eval(df.at[(i, c)]))
df['cif'] = df['structure']
df['structure'] = pandas.Series([Poscar.from_string(s).structure
for s in df['poscar']])
new_columns = ['material_id', 'formula', 'nsites', 'space_group',
'volume', 'structure', 'elastic_anisotropy',
'G_Reuss', 'G_VRH', 'G_Voigt', 'K_Reuss', 'K_VRH',
'K_Voigt', 'poisson_ratio', 'compliance_tensor',
'elastic_tensor', 'elastic_tensor_original',
'cif', 'kpoint_density', 'poscar']
return df[new_columns]
def _get_structures(self, num_structs):
structs = []
if ".py" in makestr_cmd:
options = ["-input", "struct_enum.out", str(1), str(num_structs)]
else:
options = ["struct_enum.out", str(0), str(num_structs - 1)]
rs = subprocess.Popen([makestr_cmd] + options,
stdout=subprocess.PIPE,
stdin=subprocess.PIPE, close_fds=True)
stdout, stderr = rs.communicate()
if stderr:
logger.warning(stderr.decode())
if len(self.ordered_sites) > 0:
original_latt = self.ordered_sites[0].lattice
# Need to strip sites of site_properties, which would otherwise
# result in an index error. Hence Structure is reconstructed in
# the next step.
site_properties = {}
for site in self.ordered_sites:
for k, v in site.properties.items():
if k in site_properties:
site_properties[k].append(v)
else:
site_properties[k] = [v]
ordered_structure = Structure(
original_latt,
[site.species_and_occu for site in self.ordered_sites],
[site.frac_coords for site in self.ordered_sites],
site_properties=site_properties
)
inv_org_latt = np.linalg.inv(original_latt.matrix)
for file in glob.glob('vasp.*'):
with open(file) as f:
data = f.read()
data = re.sub(r'scale factor', "1", data)
data = re.sub(r'(\d+)-(\d+)', r'\1 -\2', data)
poscar = Poscar.from_string(data, self.index_species)
sub_structure = poscar.structure
# Enumeration may have resulted in a super lattice. We need to
# find the mapping from the new lattice to the old lattice, and
# perform supercell construction if necessary.
new_latt = sub_structure.lattice
sites = []
if len(self.ordered_sites) > 0:
transformation = np.dot(new_latt.matrix, inv_org_latt)
transformation = [[int(round(cell)) for cell in row]
for row in transformation]
logger.debug("Supercell matrix: {}".format(transformation))
s = ordered_structure * transformation
sites.extend([site.to_unit_cell for site in s])
super_latt = sites[-1].lattice
else:
super_latt = new_latt
for site in sub_structure:
if site.specie.symbol != "X": # We exclude vacancies.
sites.append(PeriodicSite(site.species_and_occu,
site.frac_coords,
super_latt).to_unit_cell)
else:
warnings.warn("Skipping sites that include species X.")
structs.append(Structure.from_sites(sorted(sites)))
logger.debug("Read in a total of {} structures.".format(num_structs))
return structs
def _getStruct(system_data,space_data,structure_data,args):
"""Writes a vasp POSCAR style file for the input structure and system
data.
:arg system_data: a dictionary of the system_data
:arg space_data: a dictionary containing the spacial data
:arg structure_data: a dictionary of the data for this structure
:arg args: Dictionary of user supplied input.
"""
from numpy import array
from random import uniform
# Get the labeling, group index, structure number and arrow labels
# from the input data structure.
labeling = structure_data["labeling"]
gIndx = space_data["gIndx"]
arrows = structure_data["directions"]
struct_n = structure_data["strN"]
# The arrow basis.
arrow_directions = [[1,0,0],[-1,0,0],[0,1,0],[0,-1,0],[0,0,1],[0,0,-1]]
directions = []
# Construct the concentrations of the atoms from the labeling by
# counting the number of each type of atom present in the
# labeling.
concs = {}
for i in args["id_mapping"].keys():
this_conc = 0
for atom in range(structure_data["n"]*system_data["nD"]):
if labeling[gIndx[atom]] == str(i):
this_conc += 1
concs[i] = this_conc
def_title = "{} str #: {}\n".format(str(system_data["title"]),str(structure_data["strN"]))
# Get the lattice parameter for the atomic species provided by the
# user.
num_vac = 0
if args["vacancy"] != None:
num_vac = 1
lattice_parameter, title = _get_lattice_parameter(args["id_mapping"],concs,system_data["plattice"],
system_data["nD"],def_title,args["scale_factor"],
args["remove_zeros"],args["vegards"])
# Find out the directions for each arrow.
for arrow in arrows:
directions.append(array(arrow_directions[int(arrow)]))
sLV = space_data["sLV"]
# First write the title and the lattice parameter.
poscar = title
poscar += "{0:.3f}\n".format(lattice_parameter)
# Then write out the lattice vectors.
for i in range(3):
poscar += " {}\n".format(" ".join(
["{0: .9f}".format(j) for j in sLV[i]]))
# Write the concentrations to the output file. If the species
# strings were passed in by the user and the user requests
# there be no zeros in the concentration string then we should
# remove them from the file. Otherwise we default to leaving
# them in.
if (args["remove_zeros"] and args["id_mapping"] is not None):
types = ""
amounts = ""
for ic in concs.keys():
if concs[ic] != 0:
types += "{} ".format(args["id_mapping"][ic])
amounts += "{} ".format(str(concs[ic]))
poscar += " {}\n".format(types)
poscar += " {}".format(amounts)
else:
keys = concs.keys()
poscar += " {}\n".format(" ".join([args["id_mapping"][key] for key in keys]))
poscar += " "
for ic in keys:
poscar += "{} ".format(str(concs[ic]))
poscar += "\n"
poscar += "D\n"
# Now write out the atomic positions to the file.
for ilab in args["id_mapping"].keys():
for iAt in range(structure_data["n"]*system_data["nD"]):
rattle = uniform(-args["rattle"],args["rattle"])
displace = directions[iAt]*args["displace"]*lattice_parameter
# If the displacement is non zero and we're `rattling`
# the system then we need to modify the displacement
# by the amount being rattled.
displace += displace*rattle
if labeling[gIndx[iAt]] == str(ilab):
# The final atomic position is the position from
# the basis plus the total displacement.
out_array = array(space_data["aBas"][iAt]) + displace
poscar += " {}\n".format(
" ".join(["{0: .9f}".format(i) for i in out_array.tolist()]))
return Poscar.from_string(poscar).structure
def _get_structures(self, num_structs):
structs = []
if ".py" in makestr_cmd:
options = ["-input", "struct_enum.out", str(1), str(num_structs)]
else:
options = ["struct_enum.out", str(0), str(num_structs - 1)]
rs = subprocess.Popen([makestr_cmd] + options,
stdout=subprocess.PIPE,
stdin=subprocess.PIPE,
close_fds=True)
stdout, stderr = rs.communicate()
if stderr:
logger.warning(stderr.decode())
# sites retrieved from enumlib will lack site properties
# to ensure consistency, we keep track of what site properties
# are missing and set them to None
# TODO: improve this by mapping ordered structure to original
# disorded structure, and retrieving correct site properties
disordered_site_properties = {}
if len(self.ordered_sites) > 0:
original_latt = self.ordered_sites[0].lattice
# Need to strip sites of site_properties, which would otherwise
# result in an index error. Hence Structure is reconstructed in
# the next step.
site_properties = {}
for site in self.ordered_sites:
for k, v in site.properties.items():
disordered_site_properties[k] = None
if k in site_properties:
site_properties[k].append(v)
else:
site_properties[k] = [v]
ordered_structure = Structure(
original_latt, [site.species for site in self.ordered_sites],
[site.frac_coords for site in self.ordered_sites],
site_properties=site_properties)
inv_org_latt = np.linalg.inv(original_latt.matrix)
for file in glob.glob('vasp.*'):
with open(file) as f:
data = f.read()
data = re.sub(r'scale factor', "1", data)
data = re.sub(r'(\d+)-(\d+)', r'\1 -\2', data)
poscar = Poscar.from_string(data, self.index_species)
sub_structure = poscar.structure
# Enumeration may have resulted in a super lattice. We need to
# find the mapping from the new lattice to the old lattice, and
# perform supercell construction if necessary.
new_latt = sub_structure.lattice
sites = []
if len(self.ordered_sites) > 0:
transformation = np.dot(new_latt.matrix, inv_org_latt)
transformation = [[int(round(cell)) for cell in row]
for row in transformation]
logger.debug("Supercell matrix: {}".format(transformation))
s = ordered_structure * transformation
sites.extend([site.to_unit_cell() for site in s])
super_latt = sites[-1].lattice
else:
super_latt = new_latt
for site in sub_structure:
if site.specie.symbol != "X": # We exclude vacancies.
sites.append(
PeriodicSite(
site.species,
site.frac_coords,
super_latt,
to_unit_cell=True,
properties=disordered_site_properties))
else:
logger.debug("Skipping sites that include species X.")
structs.append(Structure.from_sites(sorted(sites)))
logger.debug("Read in a total of {} structures.".format(num_structs))
return structs