data_[Ca4As8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ca  1.0000  1.8000  1.1400
  As  2.1800  1.1500  0.6600
]
_symmetry_space_group_name_H-M [Pnma]
_cell_length_a [6.9486]
_cell_length_b [3.8307]
_cell_length_c [10.5510]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [62]
_chemical_formula_structural [CaAs2]
_chemical_formula_sum '[Ca4 As8]'
_cell_volume [280.8474]
_cell_formula_units_Z [4]
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
[
  Ca  Ca0  4  0.1857  0.7500  0.1216  1.0
  As  As1  4  0.1330  0.7500  0.4140  1.0
  As  As2  4  0.1640  0.7500  0.8289  1.0
]