def test_hex():
positions = [[0, 1, 0], [1, 1, 0], [1, 0, 0], [0, -1, 0], [-1, -1, 0], [-1, 0, 0]]
symbols = ['C']*6
unitcell = (1.4, 1.4, 1, 90, 90, 120)
hex_javelin = Structure(unitcell=unitcell,
symbols=symbols,
positions=positions)
hex_ase = ase.Atoms(symbols=symbols, scaled_positions=positions, cell=hex_javelin.unitcell.Binv)
assert len(hex_ase) == 6
# unitcell
assert_array_equal(hex_javelin.unitcell.cell,
ase.geometry.cell_to_cellpar(hex_ase.cell))
# get_atomic_numbers
assert_array_equal(hex_javelin.get_atomic_numbers(),
hex_ase.get_atomic_numbers())
# get_positions
assert_array_almost_equal(hex_javelin.get_positions(),
hex_ase.get_positions())
# get_scaled_positions
assert_array_almost_equal(hex_javelin.get_scaled_positions(),
hex_ase.get_scaled_positions())
def test_hex():
positions = [[0, 1, 0], [1, 1, 0], [1, 0, 0], [0, -1, 0], [-1, -1, 0],
[-1, 0, 0]]
symbols = ['C'] * 6
unitcell = (1.4, 1.4, 1, 90, 90, 120)
hex_javelin = Structure(unitcell=unitcell,
symbols=symbols,
positions=positions)
hex_ase = ase.Atoms(symbols=symbols,
scaled_positions=positions,
cell=hex_javelin.unitcell.Binv)
assert len(hex_ase) == 6
# unitcell
assert_array_equal(hex_javelin.unitcell.cell,
ase.geometry.cell_to_cellpar(hex_ase.cell))
# get_atomic_numbers
assert_array_equal(hex_javelin.get_atomic_numbers(),
hex_ase.get_atomic_numbers())
# get_positions
assert_array_almost_equal(hex_javelin.get_positions(),
hex_ase.get_positions())
# get_scaled_positions
assert_array_almost_equal(hex_javelin.get_scaled_positions(),
hex_ase.get_scaled_positions())
def test_average():
structure = Structure(symbols=['C', 'O'], positions=[(0, 0, 0), (0.5, 0, 0)], unitcell=5)
structure.repeat(5)
four = Fourier()
four.grid.bins = [2, 21]
four.grid.set_corners(lr=[4.0, 0.0, 0.0],
ul=[0.0, 2.0, 0.0])
four.structure = structure
four._average = True
results = four.calc()
expected_result = [1.32348898e-23, 5.71594728e-24, 8.12875148e-56,
8.37681929e-25, 6.37686377e-56, 5.46068451e-25,
2.54939667e-55, 8.37681929e-25, 7.16891360e-55,
5.21188409e-24, 1.32348898e-23, 5.71594728e-24,
3.46656800e-54, 8.37681929e-25, 5.74150325e-55,
5.46068451e-25, 2.74171118e-55, 8.37681929e-25,
1.00428514e-54, 5.21188409e-24, 1.32348898e-23]
assert_array_almost_equal(results[0, :, 0], expected_result)
# Random move
structure.rattle(seed=0)
results = four.calc()
expected_result = [1.32348898e-23, 8.88939203e-04, 7.27741076e-03,
1.91258313e-02, 5.94954973e-02, 1.26500450e-01,
1.34462469e-01, 1.04512735e-01, 1.17228978e-01,
7.24444566e-02, 5.87435134e-26, 1.06907925e-01,
2.60217008e-01, 3.57817285e-01, 7.25525103e-01,
1.13842501e+00, 9.60372378e-01, 6.18668588e-01,
5.97492048e-01, 3.24844518e-01, 2.34454638e-25]
assert_array_almost_equal(results[0, :, 0], expected_result)
def test_except():
with pytest.raises(ValueError):
Structure(symbols=['U'], positions=[[0, 0, 0]], ncells=[1, 1, 1, 2])
structure = Structure()
with pytest.raises(ValueError):
structure.add_atom(symbol='U')
def test_reindex():
structure = Structure(unitcell=5, symbols=['Au', 'Ag', 'Pt', 'Pb'], positions=[[0, 0, 0],
[0, 0, 0],
[0, 0, 0],
[0, 0, 0]])
assert_array_equal(structure.atoms.index.tolist(), [(0, 0, 0, 0),
(0, 0, 0, 1),
(0, 0, 0, 2),
(0, 0, 0, 3)])
assert_array_almost_equal(structure.xyz_cartn, [[0., 0., 0.],
[0., 0., 0.],
[0., 0., 0.],
[0., 0., 0.]])
structure.reindex([2, 2, 1, 1])
assert_array_equal(structure.atoms.index.tolist(), [(0, 0, 0, 0),
(0, 1, 0, 0),
(1, 0, 0, 0),
(1, 1, 0, 0)])
assert_array_almost_equal(structure.xyz_cartn, [[0., 0., 0.],
[0., 5., 0.],
[5., 0., 0.],
[5., 5., 0.]])
structure.reindex([1, 1, 2, 2])
assert_array_equal(structure.atoms.index.tolist(), [(0, 0, 0, 0),
(0, 0, 0, 1),
(0, 0, 1, 0),
(0, 0, 1, 1)])
assert_array_almost_equal(structure.xyz_cartn, [[0., 0., 0.],
[0., 0., 0.],
[0., 0., 5.],
[0., 0., 5.]])
def test_except():
with pytest.raises(ValueError):
Structure(symbols=['U'], positions=[[0, 0, 0]], ncells=[1, 1, 1, 2])
structure = Structure()
with pytest.raises(ValueError):
structure.add_atom(symbol='U')
def test_hex():
from javelin.unitcell import UnitCell
positions = [[0, 1, 0], [1, 1, 0], [1, 0, 0], [0, -1, 0], [-1, -1, 0],
[-1, 0, 0]]
symbols = ['C'] * 6
unitcell = (1.4, 1.4, 1, 90, 90, 120)
hex_cell = Structure(unitcell=UnitCell(unitcell),
symbols=symbols,
positions=positions)
assert hex_cell.number_of_atoms == 6
assert_array_equal(hex_cell.element, ['C', 'C', 'C', 'C', 'C', 'C'])
assert_array_equal(hex_cell.get_atom_symbols(), ['C'])
assert_array_equal(hex_cell.get_atom_count(), 6)
assert_array_equal(hex_cell.get_chemical_symbols(),
['C', 'C', 'C', 'C', 'C', 'C'])
assert_array_equal(hex_cell.get_atom_Zs(), [6])
assert_array_equal(hex_cell.get_atomic_numbers(), [6, 6, 6, 6, 6, 6])
assert_array_equal(hex_cell.x, [0, 1, 1, 0, -1, -1])
assert_array_equal(hex_cell.y, [1, 1, 0, -1, -1, 0])
assert_array_equal(hex_cell.z, [0, 0, 0, 0, 0, 0])
assert_array_equal(hex_cell.xyz, positions)
assert_array_equal(hex_cell.get_scaled_positions(), positions)
real_positions = [[0, 1.4, 0], [1.21243557, 0.7, 0], [1.21243557, -0.7, 0],
[0, -1.4, 0], [-1.21243557, -0.7, 0],
[-1.21243557, 0.7, 0]]
assert_array_almost_equal(hex_cell.xyz_cartn, real_positions)
assert_array_almost_equal(hex_cell.get_positions(), real_positions)
assert_array_almost_equal(hex_cell.unitcell.cell, unitcell)
def test_hex():
from javelin.unitcell import UnitCell
positions = [[0, 1, 0], [1, 1, 0], [1, 0, 0], [0, -1, 0], [-1, -1, 0], [-1, 0, 0]]
symbols = ['C']*6
unitcell = (1.4, 1.4, 1, 90, 90, 120)
hex_cell = Structure(unitcell=UnitCell(unitcell),
symbols=symbols,
positions=positions)
assert hex_cell.number_of_atoms == 6
assert_array_equal(hex_cell.element, ['C', 'C', 'C', 'C', 'C', 'C'])
assert_array_equal(hex_cell.get_atom_symbols(), ['C'])
assert_array_equal(hex_cell.get_atom_count(), 6)
assert_array_equal(hex_cell.get_chemical_symbols(), ['C', 'C', 'C', 'C', 'C', 'C'])
assert_array_equal(hex_cell.get_atom_Zs(), [6])
assert_array_equal(hex_cell.get_atomic_numbers(), [6, 6, 6, 6, 6, 6])
assert_array_equal(hex_cell.x, [0, 1, 1, 0, -1, -1])
assert_array_equal(hex_cell.y, [1, 1, 0, -1, -1, 0])
assert_array_equal(hex_cell.z, [0, 0, 0, 0, 0, 0])
assert_array_equal(hex_cell.xyz, positions)
assert_array_equal(hex_cell.get_scaled_positions(), positions)
real_positions = [[0, 1.4, 0],
[1.21243557, 0.7, 0],
[1.21243557, -0.7, 0],
[0, -1.4, 0],
[-1.21243557, -0.7, 0],
[-1.21243557, 0.7, 0]]
assert_array_almost_equal(hex_cell.xyz_cartn, real_positions)
assert_array_almost_equal(hex_cell.get_positions(), real_positions)
assert_array_almost_equal(hex_cell.unitcell.cell, unitcell)
def test_lots():
import numpy as np
np.random.seed(42) # Make random lot selection not random
structure = Structure(symbols=['C', 'O'], positions=[(0, 0, 0), (0.5, 0, 0)], unitcell=5)
structure.repeat(5)
four = Fourier()
four.grid.bins = [2, 21]
four.grid.set_corners(lr=[4.0, 0.0, 0.0],
ul=[0.0, 2.0, 0.0])
four.structure = structure
four.lots = None
results = four.calc()
expected_result = [2.42323706e+06, 1.01505872e+06, 1.46887112e-26,
1.48095071e+05, 1.16378024e-26, 9.69294822e+04,
5.01755975e-26, 1.48095071e+05, 1.35809407e-25,
1.01505872e+06, 2.42323706e+06, 1.01505872e+06,
6.70205900e-25, 1.48095071e+05, 1.03080955e-25,
9.69294822e+04, 5.35400081e-26, 1.48095071e+05,
1.77832044e-25, 1.01505872e+06, 2.42323706e+06]
assert_allclose(results[0, :, 0], expected_result, atol=1e-25)
four.lots = 3, 3, 3
four.number_of_lots = 3
results = four.calc()
expected_result = [339175.64420172, 202125.69466616, 98663.70718625,
61677.5841574, 14394.84088099, 37686.18268908,
14394.84088099, 61677.5841574, 98663.70718625,
202125.69466616, 339175.64420172, 202125.69466616,
98663.70718625, 61677.5841574, 14394.84088099,
37686.18268908, 14394.84088099, 61677.5841574,
98663.70718625, 202125.69466616, 339175.64420172]
assert_allclose(results[0, :, 0], expected_result)
# Random move + average subtraction
structure.rattle(seed=0)
four._average = True
results = four.calc()
expected_result = [1.63820535e-24, 2.55360350e+05, 2.83431155e+05,
5.87063567e+04, 3.06182580e+04, 6.47880007e-03,
3.06274940e+04, 5.87242408e+04, 2.83411515e+05,
2.55140706e+05, 3.20451398e-01, 2.55556564e+05,
2.83427875e+05, 5.86850273e+04, 3.06047773e+04,
5.83516439e-02, 3.06324860e+04, 5.87386761e+04,
2.83368966e+05, 2.54897708e+05, 1.28156664e+00]
assert_allclose(results[0, :, 0], expected_result)
def test_hex():
positions = [[0, 1, 0], [1, 1, 0], [1, 0, 0], [0, -1, 0], [-1, -1, 0], [-1, 0, 0]]
symbols = ['C']*6
unitcell = (1.4, 1.4, 1, 90, 90, 120)
hex_javelin = Structure(unitcell=unitcell,
symbols=symbols,
positions=positions)
hex_diffpy = dps.Structure(atoms=[dps.Atom(atype='C', xyz=xyz) for xyz in positions],
lattice=dps.Lattice(1.4, 1.4, 1, 90, 90, 120))
assert len(hex_diffpy) == 6
# unitcell
assert_array_almost_equal(hex_javelin.unitcell.cell,
hex_diffpy.lattice.abcABG())
# element
assert_array_equal(hex_javelin.element,
np.array(hex_diffpy.element))
# xyz
assert_array_almost_equal(hex_javelin.xyz,
hex_diffpy.xyz)
# xyz_cartn
assert_array_almost_equal(hex_javelin.xyz_cartn,
hex_diffpy.xyz_cartn)
def test_one_atom_add():
structure = Structure()
structure.unitcell.cell = (3.0, 4.0, 5.0, 90.0, 90.0, 90.0)
structure.add_atom(symbol='Au', position=[0.5, 0, 0.25])
assert structure.number_of_atoms == 1
assert_array_equal(structure.element, ['Au'])
assert_array_equal(structure.get_atom_symbols(), ['Au'])
assert_array_equal(structure.get_atom_count(), 1)
assert_array_equal(structure.get_chemical_symbols(), ['Au'])
assert_array_equal(structure.get_atom_Zs(), [79])
assert_array_equal(structure.get_atomic_numbers(), [79])
assert_array_equal(structure.x, [0.5])
assert_array_equal(structure.y, [0])
assert_array_equal(structure.z, [0.25])
assert_array_equal(structure.xyz, [[0.5, 0, 0.25]])
assert_array_equal(structure.get_scaled_positions(), [[0.5, 0, 0.25]])
assert_array_almost_equal(structure.xyz_cartn, [[1.5, 0, 1.25]])
assert_array_almost_equal(structure.get_positions(), [[1.5, 0, 1.25]])
assert_array_equal(structure.unitcell.cell, (3.0, 4.0, 5.0, 90.0, 90.0, 90.0))
def test_reindex():
structure = Structure(unitcell=5,
symbols=['Au', 'Ag', 'Pt', 'Pb'],
positions=[[0, 0, 0], [0, 0, 0], [0, 0, 0],
[0, 0, 0]])
assert_array_equal(structure.atoms.index.tolist(), [(0, 0, 0, 0),
(0, 0, 0, 1),
(0, 0, 0, 2),
(0, 0, 0, 3)])
assert_array_almost_equal(
structure.xyz_cartn,
[[0., 0., 0.], [0., 0., 0.], [0., 0., 0.], [0., 0., 0.]])
structure.reindex([2, 2, 1, 1])
assert_array_equal(structure.atoms.index.tolist(), [(0, 0, 0, 0),
(0, 1, 0, 0),
(1, 0, 0, 0),
(1, 1, 0, 0)])
assert_array_almost_equal(
structure.xyz_cartn,
[[0., 0., 0.], [0., 5., 0.], [5., 0., 0.], [5., 5., 0.]])
structure.reindex([1, 1, 2, 2])
assert_array_equal(structure.atoms.index.tolist(), [(0, 0, 0, 0),
(0, 0, 0, 1),
(0, 0, 1, 0),
(0, 0, 1, 1)])
assert_array_almost_equal(
structure.xyz_cartn,
[[0., 0., 0.], [0., 0., 0.], [0., 0., 5.], [0., 0., 5.]])
def test_empty():
structure = Structure()
assert structure.number_of_atoms == 0
assert_array_equal(structure.element, np.empty(0))
assert_array_equal(structure.get_atom_symbols(), np.empty(0))
assert_array_equal(structure.get_atom_count(), 0)
assert_array_equal(structure.get_chemical_symbols(), np.empty(0))
assert_array_equal(structure.get_atom_Zs(), np.empty(0))
assert_array_equal(structure.get_atomic_numbers(), np.empty(0))
assert_array_equal(structure.x, np.empty(0))
assert_array_equal(structure.y, np.empty(0))
assert_array_equal(structure.z, np.empty(0))
assert_array_equal(structure.xyz, np.empty((0, 3)))
assert_array_equal(structure.get_scaled_positions(), np.empty((0, 3)))
assert_array_equal(structure.xyz_cartn, np.empty((0, 3)))
assert_array_equal(structure.get_positions(), np.empty((0, 3)))
assert_array_equal(structure.unitcell.cell,
(1.0, 1.0, 1.0, 90.0, 90.0, 90.0))
def test_one_atom_init():
structure = Structure(symbols=['Au'],
positions=[[0.5, 0, 0.25]],
unitcell=(3, 4, 5))
assert structure.number_of_atoms == 1
assert_array_equal(structure.element, ['Au'])
assert_array_equal(structure.get_atom_symbols(), ['Au'])
assert_array_equal(structure.get_atom_count(), 1)
assert_array_equal(structure.get_chemical_symbols(), ['Au'])
assert_array_equal(structure.get_atom_Zs(), [79])
assert_array_equal(structure.get_atomic_numbers(), [79])
assert_array_equal(structure.x, [0.5])
assert_array_equal(structure.y, [0])
assert_array_equal(structure.z, [0.25])
assert_array_equal(structure.xyz, [[0.5, 0, 0.25]])
assert_array_equal(structure.get_scaled_positions(), [[0.5, 0, 0.25]])
assert_array_almost_equal(structure.xyz_cartn, [[1.5, 0, 1.25]])
assert_array_almost_equal(structure.get_positions(), [[1.5, 0, 1.25]])
assert_array_equal(structure.unitcell.cell,
(3.0, 4.0, 5.0, 90.0, 90.0, 90.0))
def test_empty():
structure = Structure()
assert structure.number_of_atoms == 0
assert_array_equal(structure.element, np.empty(0))
assert_array_equal(structure.get_atom_symbols(), np.empty(0))
assert_array_equal(structure.get_atom_count(), 0)
assert_array_equal(structure.get_chemical_symbols(), np.empty(0))
assert_array_equal(structure.get_atom_Zs(), np.empty(0))
assert_array_equal(structure.get_atomic_numbers(), np.empty(0))
assert_array_equal(structure.x, np.empty(0))
assert_array_equal(structure.y, np.empty(0))
assert_array_equal(structure.z, np.empty(0))
assert_array_equal(structure.xyz, np.empty((0, 3)))
assert_array_equal(structure.get_scaled_positions(), np.empty((0, 3)))
assert_array_equal(structure.xyz_cartn, np.empty((0, 3)))
assert_array_equal(structure.get_positions(), np.empty((0, 3)))
assert_array_equal(structure.unitcell.cell, (1.0, 1.0, 1.0, 90.0, 90.0, 90.0))
def read_stru(filename, starting_cell=(1, 1, 1)):
"""Read in a .stru file saved from DISCUS into a javelin Structure
If the line ncell is not present in the file all the atoms will be
read into a single cell."""
from javelin.structure import Structure
import numpy as np
with open(filename) as f:
lines = f.readlines()
a = b = c = alpha = beta = gamma = 0
reading_atom_list = False
ncell = None
symbols = []
x = []
y = []
z = []
for l in lines:
line = l.replace(',', ' ').split()
if not reading_atom_list: # Wait for 'atoms' line before reading atoms
if line[0] == 'cell':
a, b, c, alpha, beta, gamma = [
float(word) for word in line[1:7]
]
elif line[0] == 'ncell':
ncell = [int(word) for word in line[1:5]]
elif line[0] == 'atoms':
if a == 0:
print("Cell not found")
a = b = c = 1
alpha = beta = gamma = 90
reading_atom_list = True
else:
symbol, xx, yy, zz = line[:4]
symbols.append(symbol)
x.append(xx)
y.append(yy)
z.append(zz)
print("Found a = {}, b = {}, c = {}, alpha = {}, beta = {}, gamma = {}".
format(a, b, c, alpha, beta, gamma))
x = np.array(x, dtype=np.float64)
y = np.array(y, dtype=np.float64)
z = np.array(z, dtype=np.float64)
symbols = np.array(symbols)
if ncell is not None:
x -= np.tile(np.repeat(np.array(range(ncell[0])), ncell[3]),
ncell[1] * ncell[2]) + starting_cell[0]
y -= np.tile(np.repeat(np.array(range(ncell[1])), ncell[0] * ncell[3]),
ncell[2]) + starting_cell[1]
z -= np.repeat(np.array(range(ncell[2])),
ncell[0] * ncell[1] * ncell[3]) + starting_cell[2]
# reorder atom arrays, discus stru files have x increment fastest
# and z slowest, javelin is the opposite
x = x.reshape(ncell).transpose((2, 1, 0, 3)).flatten()
y = y.reshape(ncell).transpose((2, 1, 0, 3)).flatten()
z = z.reshape(ncell).transpose((2, 1, 0, 3)).flatten()
symbols = symbols.reshape(ncell).transpose((2, 1, 0, 3)).flatten()
xyz = np.array((x, y, z)).T
structure = Structure(unitcell=(a, b, c, alpha, beta, gamma),
symbols=symbols,
positions=xyz,
ncells=ncell)
print("Read in these atoms:")
print(structure.get_atom_count())
return structure
def test_repeat():
structure = Structure(unitcell=5,
symbols=['Au', 'Ag'],
positions=[[0, 0, 0], [0.5, 0.5, 0.5]])
assert structure.number_of_atoms == 2
assert_array_equal(structure.get_atom_count(), [1, 1])
assert_array_equal(structure.get_atom_Zs(), [79, 47])
assert_array_equal(structure.get_atomic_numbers(), [79, 47])
assert_array_equal(structure.element, ['Au', 'Ag'])
assert_array_equal(structure.get_atom_symbols(), ['Au', 'Ag'])
assert_array_equal(structure.get_chemical_symbols(), ['Au', 'Ag'])
assert_array_equal(structure.xyz, [[0., 0., 0.], [0.5, 0.5, 0.5]])
assert_array_almost_equal(structure.xyz_cartn,
[[0., 0., 0.], [2.5, 2.5, 2.5]])
structure.repeat((2, 3, 1))
assert structure.number_of_atoms == 12
assert_array_equal(structure.get_atom_count(), [6, 6])
assert_array_equal(structure.get_atom_Zs(), [79, 47])
assert_array_equal(structure.get_atomic_numbers(),
[79, 47, 79, 47, 79, 47, 79, 47, 79, 47, 79, 47])
assert_array_equal(structure.element, [
'Au', 'Ag', 'Au', 'Ag', 'Au', 'Ag', 'Au', 'Ag', 'Au', 'Ag', 'Au', 'Ag'
])
assert_array_equal(structure.get_atom_symbols(), ['Au', 'Ag'])
assert_array_equal(structure.get_chemical_symbols(), [
'Au', 'Ag', 'Au', 'Ag', 'Au', 'Ag', 'Au', 'Ag', 'Au', 'Ag', 'Au', 'Ag'
])
assert_array_equal(structure.xyz,
np.tile([[0., 0., 0.], [0.5, 0.5, 0.5]], (6, 1)))
assert_array_almost_equal(
structure.xyz_cartn,
[[0.0, 0.0, 0.0], [2.5, 2.5, 2.5], [0.0, 5.0, 0.0], [2.5, 7.5, 2.5],
[0.0, 10.0, 0.0], [2.5, 12.5, 2.5], [5.0, 0.0, 0.0], [7.5, 2.5, 2.5],
[5.0, 5.0, 0.0], [7.5, 7.5, 2.5], [5.0, 10.0, 0.0], [7.5, 12.5, 2.5]])
structure = Structure(unitcell=5,
symbols=['Au', 'Ag'],
positions=[[0, 0, 0], [0.5, 0.5, 0.5]])
structure.repeat(2)
assert structure.number_of_atoms == 16
assert_array_equal(structure.get_atom_count(), [8, 8])
assert_array_equal(structure.get_atom_Zs(), [79, 47])
assert_array_equal(
structure.get_atomic_numbers(),
[79, 47, 79, 47, 79, 47, 79, 47, 79, 47, 79, 47, 79, 47, 79, 47])
assert_array_equal(structure.element, [
'Au', 'Ag', 'Au', 'Ag', 'Au', 'Ag', 'Au', 'Ag', 'Au', 'Ag', 'Au', 'Ag',
'Au', 'Ag', 'Au', 'Ag'
])
assert_array_equal(structure.get_atom_symbols(), ['Au', 'Ag'])
assert_array_equal(structure.get_chemical_symbols(), [
'Au', 'Ag', 'Au', 'Ag', 'Au', 'Ag', 'Au', 'Ag', 'Au', 'Ag', 'Au', 'Ag',
'Au', 'Ag', 'Au', 'Ag'
])
assert_array_equal(structure.xyz,
np.tile([[0., 0., 0.], [0.5, 0.5, 0.5]], (8, 1)))
assert_array_almost_equal(
structure.xyz_cartn,
[[0.0, 0.0, 0.0], [2.5, 2.5, 2.5], [0.0, 0.0, 5.0], [2.5, 2.5, 7.5],
[0.0, 5.0, 0.0], [2.5, 7.5, 2.5], [0.0, 5.0, 5.0], [2.5, 7.5, 7.5],
[5.0, 0.0, 0.0], [7.5, 2.5, 2.5], [5.0, 0.0, 5.0], [7.5, 2.5, 7.5],
[5.0, 5.0, 0.0], [7.5, 7.5, 2.5], [5.0, 5.0, 5.0], [7.5, 7.5, 7.5]])
def test_repeat():
structure = Structure(unitcell=5, symbols=['Au', 'Ag'], positions=[[0, 0, 0], [0.5, 0.5, 0.5]])
assert structure.number_of_atoms == 2
assert_array_equal(structure.get_atom_count(), [1, 1])
assert_array_equal(structure.get_atom_Zs(), [79, 47])
assert_array_equal(structure.get_atomic_numbers(), [79, 47])
assert_array_equal(structure.element, ['Au', 'Ag'])
assert_array_equal(structure.get_atom_symbols(), ['Au', 'Ag'])
assert_array_equal(structure.get_chemical_symbols(), ['Au', 'Ag'])
assert_array_equal(structure.xyz, [[0., 0., 0.],
[0.5, 0.5, 0.5]])
assert_array_almost_equal(structure.xyz_cartn, [[0., 0., 0.],
[2.5, 2.5, 2.5]])
structure.repeat((2, 3, 1))
assert structure.number_of_atoms == 12
assert_array_equal(structure.get_atom_count(), [6, 6])
assert_array_equal(structure.get_atom_Zs(), [79, 47])
assert_array_equal(structure.get_atomic_numbers(), [79, 47, 79, 47, 79, 47,
79, 47, 79, 47, 79, 47])
assert_array_equal(structure.element, ['Au', 'Ag', 'Au', 'Ag', 'Au', 'Ag',
'Au', 'Ag', 'Au', 'Ag', 'Au', 'Ag'])
assert_array_equal(structure.get_atom_symbols(), ['Au', 'Ag'])
assert_array_equal(structure.get_chemical_symbols(), ['Au', 'Ag', 'Au', 'Ag', 'Au', 'Ag',
'Au', 'Ag', 'Au', 'Ag', 'Au', 'Ag'])
assert_array_equal(structure.xyz, np.tile([[0., 0., 0.],
[0.5, 0.5, 0.5]], (6, 1)))
assert_array_almost_equal(structure.xyz_cartn, [[0.0, 0.0, 0.0],
[2.5, 2.5, 2.5],
[0.0, 5.0, 0.0],
[2.5, 7.5, 2.5],
[0.0, 10.0, 0.0],
[2.5, 12.5, 2.5],
[5.0, 0.0, 0.0],
[7.5, 2.5, 2.5],
[5.0, 5.0, 0.0],
[7.5, 7.5, 2.5],
[5.0, 10.0, 0.0],
[7.5, 12.5, 2.5]])
structure = Structure(unitcell=5, symbols=['Au', 'Ag'], positions=[[0, 0, 0], [0.5, 0.5, 0.5]])
structure.repeat(2)
assert structure.number_of_atoms == 16
assert_array_equal(structure.get_atom_count(), [8, 8])
assert_array_equal(structure.get_atom_Zs(), [79, 47])
assert_array_equal(structure.get_atomic_numbers(), [79, 47, 79, 47, 79, 47, 79, 47,
79, 47, 79, 47, 79, 47, 79, 47])
assert_array_equal(structure.element, ['Au', 'Ag', 'Au', 'Ag',
'Au', 'Ag', 'Au', 'Ag',
'Au', 'Ag', 'Au', 'Ag',
'Au', 'Ag', 'Au', 'Ag'])
assert_array_equal(structure.get_atom_symbols(), ['Au', 'Ag'])
assert_array_equal(structure.get_chemical_symbols(), ['Au', 'Ag', 'Au', 'Ag',
'Au', 'Ag', 'Au', 'Ag',
'Au', 'Ag', 'Au', 'Ag',
'Au', 'Ag', 'Au', 'Ag'])
assert_array_equal(structure.xyz, np.tile([[0., 0., 0.],
[0.5, 0.5, 0.5]], (8, 1)))
assert_array_almost_equal(structure.xyz_cartn, [[0.0, 0.0, 0.0],
[2.5, 2.5, 2.5],
[0.0, 0.0, 5.0],
[2.5, 2.5, 7.5],
[0.0, 5.0, 0.0],
[2.5, 7.5, 2.5],
[0.0, 5.0, 5.0],
[2.5, 7.5, 7.5],
[5.0, 0.0, 0.0],
[7.5, 2.5, 2.5],
[5.0, 0.0, 5.0],
[7.5, 2.5, 7.5],
[5.0, 5.0, 0.0],
[7.5, 7.5, 2.5],
[5.0, 5.0, 5.0],
[7.5, 7.5, 7.5]])
def read_stru(filename, starting_cell=(1, 1, 1)):
"""Read in a .stru file saved from DISCUS into a javelin Structure
If the line ncell is not present in the file all the atoms will be
read into a single cell."""
from javelin.structure import Structure
import numpy as np
with open(filename) as f:
lines = f.readlines()
a = b = c = alpha = beta = gamma = 0
reading_atom_list = False
ncell = None
symbols = []
x = []
y = []
z = []
for l in lines:
line = l.replace(',', ' ').split()
if not reading_atom_list: # Wait for 'atoms' line before reading atoms
if line[0] == 'cell':
a, b, c, alpha, beta, gamma = [float(word) for word in line[1:7]]
elif line[0] == 'ncell':
ncell = [int(word) for word in line[1:5]]
elif line[0] == 'atoms':
if a == 0:
print("Cell not found")
a = b = c = 1
alpha = beta = gamma = 90
reading_atom_list = True
else:
symbol, xx, yy, zz = line[:4]
symbols.append(symbol)
x.append(xx)
y.append(yy)
z.append(zz)
print("Found a = {}, b = {}, c = {}, alpha = {}, beta = {}, gamma = {}"
.format(a, b, c, alpha, beta, gamma))
x = np.array(x, dtype=np.float64)
y = np.array(y, dtype=np.float64)
z = np.array(z, dtype=np.float64)
symbols = np.array(symbols)
if ncell is not None:
x -= np.tile(np.repeat(np.array(range(ncell[0])),
ncell[3]), ncell[1]*ncell[2]) + starting_cell[0]
y -= np.tile(np.repeat(np.array(range(ncell[1])),
ncell[0]*ncell[3]), ncell[2]) + starting_cell[1]
z -= np.repeat(np.array(range(ncell[2])),
ncell[0]*ncell[1]*ncell[3]) + starting_cell[2]
# reorder atom arrays, discus stru files have x increment fastest
# and z slowest, javelin is the opposite
x = x.reshape(ncell).transpose((2, 1, 0, 3)).flatten()
y = y.reshape(ncell).transpose((2, 1, 0, 3)).flatten()
z = z.reshape(ncell).transpose((2, 1, 0, 3)).flatten()
symbols = symbols.reshape(ncell).transpose((2, 1, 0, 3)).flatten()
xyz = np.array((x, y, z)).T
structure = Structure(unitcell=(a, b, c, alpha, beta, gamma),
symbols=symbols,
positions=xyz,
ncells=ncell)
print("Read in these atoms:")
print(structure.get_atom_count())
return structure
