The crystal structure described by LaAs2 crystallizes in the monoclinic P2_1/c space group. La(1) is bonded in a 9-coordinate geometry to four equivalent As(2) and five equivalent As(1) atoms. There are two inequivalent As sites. In the first As site, As(2) is bonded in a 6-coordinate geometry to four equivalent La(1), one As(1), and one As(2) atom. In the second As site, As(1) is bonded to five equivalent La(1) and one As(2) atom to form a mixture of distorted corner and edge-sharing AsLa5As pentagonal pyramids. is represented by the CIF card [CIF]
data_LaAs2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.260
_cell_length_b   6.982
_cell_length_c   10.346
_cell_angle_alpha   90.000
_cell_angle_beta   96.584
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   305.700
_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
  La  La0  1  0.728  0.814  0.640  1.0
  La  La1  1  0.772  0.314  0.860  1.0
  La  La2  1  0.272  0.186  0.360  1.0
  La  La3  1  0.228  0.686  0.140  1.0
  As  As4  1  0.203  0.150  0.670  1.0
  As  As5  1  0.297  0.650  0.830  1.0
  As  As6  1  0.797  0.850  0.330  1.0
  As  As7  1  0.703  0.350  0.170  1.0
  As  As8  1  0.667  0.877  0.951  1.0
  As  As9  1  0.833  0.377  0.549  1.0
  As  As10  1  0.333  0.123  0.049  1.0
  As  As11  1  0.167  0.623  0.451  1.0
[/CIF]
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The crystal structure described by LaAs2 crystallizes in the monoclinic P2_1/c space group. La(1) is bonded in a 9-coordinate geometry to four equivalent As(2) and five equivalent As(1) atoms. There are two inequivalent As sites. In the first As site, As(2) is bonded in a 6-coordinate geometry to four equivalent La(1), one As(1), and one As(2) atom. In the second As site, As(1) is bonded to five equivalent La(1) and one As(2) atom to form a mixture of distorted corner and edge-sharing AsLa5As pentagonal pyramids. is represented by the CIF card [CIF]
data_LaAs2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.260
_cell_length_b   6.982
_cell_length_c   10.346
_cell_angle_alpha   90.000
_cell_angle_beta   96.584
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   305.700
_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
  La  La0  1  0.728  0.814  0.640  1.0
  La  La1  1  0.772  0.314  0.860  1.0
  La  La2  1  0.272  0.186  0.360  1.0
  La  La3  1  0.228  0.686  0.140  1.0
  As  As4  1  0.203  0.150  0.670  1.0
  As  As5  1  0.297  0.650  0.830  1.0
  As  As6  1  0.797  0.850  0.330  1.0
  As  As7  1  0.703  0.350  0.170  1.0
  As  As8  1  0.667  0.877  0.951  1.0
  As  As9  1  0.833  0.377  0.549  1.0
  As  As10  1  0.333  0.123  0.049  1.0
  As  As11  1  0.167  0.623  0.451  1.0
[/CIF]
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