data_LaAlP2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.93
_cell_length_b   3.93
_cell_length_c   6.14
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   LaAlP2
_chemical_formula_sum   'La1 Al1 P2'
_cell_volume   94.8
_cell_formula_units_Z   1
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  La1  1  0.96  0.96  0.18  1.0
  Al  Al0  1  0.0  0.0  0.05  1.0
  P  P2  1  0.0  0.0  0.85  1.0
  P  P3  1  0.96  0.96  0.27  1.0

data_LaAlP2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.56
_cell_length_b   5.56
_cell_length_c   6.14
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   LaAlP2
_chemical_formula_sum   'La2 Al2 P4'
_cell_volume   189.6
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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  2  0.46  0.5  0.18  1.0
  Al  Al1  2  0.0  0.0  0.05  1.0
  P  P2  2  0.0  0.0  0.85  1.0
  P  P3  2  0.46  0.5  0.27  1.0

La Al P P
LaAlP2 is Cyanogen Chloride-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two LaAlP2 clusters. La(1) is bonded in a linear geometry to one Al(1) and one P(2) atom. The La(1)-Al(1) bond length is 0.80 Å. The La(1)-P(2) bond length is 0.54 Å. Al(1) is bonded in a linear geometry to one La(1) and one P(1) atom. The Al(1)-P(1) bond length is 1.25 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded in a single-bond geometry to one Al(1) atom. In the second P site, P(2) is bonded in a single-bond geometry to one La(1) atom.