The material described by Mg2P crystallizes in the monoclinic C2/m space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to four equivalent P(1) atoms to form a mixture of distorted corner and edge-sharing MgP4 trigonal pyramids. In the second Mg site, Mg(2) is bonded in a 4-coordinate geometry to four equivalent P(1) atoms. P(1) is bonded in a 8-coordinate geometry to four equivalent Mg(1) and four equivalent Mg(2) atoms. is represented by the CIF file [CIF]
data_Mg2P
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.744
_cell_length_b   6.634
_cell_length_c   5.466
_cell_angle_alpha   65.912
_cell_angle_beta   90.000
_cell_angle_gamma   106.392
_symmetry_Int_Tables_number   1
_cell_volume   117.893
_cell_formula_units_Z   2
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
  Mg  Mg0  1  0.324  0.648  0.400  1.0
  Mg  Mg1  1  0.030  0.059  0.450  1.0
  Mg  Mg2  1  0.026  0.052  0.939  1.0
  Mg  Mg3  1  0.732  0.463  0.989  1.0
  P  P4  1  0.670  0.341  0.552  1.0
  P  P5  1  0.385  0.770  0.837  1.0
[/CIF]
.
The material described by Mg2P crystallizes in the monoclinic C2/m space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to four equivalent P(1) atoms to form a mixture of distorted corner and edge-sharing MgP4 trigonal pyramids. In the second Mg site, Mg(2) is bonded in a 4-coordinate geometry to four equivalent P(1) atoms. P(1) is bonded in a 8-coordinate geometry to four equivalent Mg(1) and four equivalent Mg(2) atoms. is represented by the CIF file [CIF]
data_Mg2P
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.744
_cell_length_b   6.634
_cell_length_c   5.466
_cell_angle_alpha   65.912
_cell_angle_beta   90.000
_cell_angle_gamma   106.392
_symmetry_Int_Tables_number   1
_cell_volume   117.893
_cell_formula_units_Z   2
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
  Mg  Mg0  1  0.324  0.648  0.400  1.0
  Mg  Mg1  1  0.030  0.059  0.450  1.0
  Mg  Mg2  1  0.026  0.052  0.939  1.0
  Mg  Mg3  1  0.732  0.463  0.989  1.0
  P  P4  1  0.670  0.341  0.552  1.0
  P  P5  1  0.385  0.770  0.837  1.0
[/CIF]
.