1import numpy as np
2
3from ase.cluster.cubic import SimpleCubicFactory
4
5
6# The L1_2 structure is "based on FCC", but is really simple cubic
7# with a basis.
8class AuCu3Factory(SimpleCubicFactory):
9    "A factory for creating AuCu3 (L1_2) lattices."
10
11    atomic_basis = np.array([[0., 0., 0.],
12                             [0., .5, .5],
13                             [.5, 0., .5],
14                             [.5, .5, 0.]])
15
16    element_basis = [0, 1, 1, 1]
17
18
19AuCu3 = L1_2 = AuCu3Factory()
20