The structure described by BeP2 crystallizes in the monoclinic C2/c space group. There are two inequivalent Be sites. In the first Be site, Be(1) is bonded to one P(1), one P(2), one P(4), and one P(5) atom to form BeP4 tetrahedra that share  a cornercorner with one Be(1)P4 tetrahedra,  a cornercorner with one P(1)Be2P2 tetrahedra,  a cornercorner with one P(3)Be2P2 tetrahedra,  a cornercorner with one P(5)Be2P2 tetrahedra, corners with two equivalent P(2)Be2P2 tetrahedra, corners with three equivalent Be(2)P4 tetrahedra, and corners with three equivalent P(4)Be2P2 tetrahedra. In the second Be site, Be(2) is bonded to one P(2), one P(3), one P(4), and one P(5) atom to form BeP4 tetrahedra that share  a cornercorner with one Be(2)P4 tetrahedra,  a cornercorner with one P(1)Be2P2 tetrahedra,  a cornercorner with one P(3)Be2P2 tetrahedra,  a cornercorner with one P(4)Be2P2 tetrahedra, corners with two equivalent P(2)Be2P2 tetrahedra, corners with three equivalent Be(1)P4 tetrahedra, and corners with three equivalent P(5)Be2P2 tetrahedra. There are five inequivalent P sites. In the first P site, P(1) is bonded to two equivalent Be(1) and two equivalent P(4) atoms to form distorted PBe2P2 tetrahedra that share corners with two equivalent Be(1)P4 tetrahedra, corners with two equivalent Be(2)P4 tetrahedra, corners with two equivalent P(4)Be2P2 tetrahedra, corners with two equivalent P(5)Be2P2 tetrahedra, and corners with four equivalent P(2)Be2P2 tetrahedra. In the second P site, P(2) is bonded to one Be(1), one Be(2), one P(4), and one P(5) atom to form distorted PBe2P2 tetrahedra that share corners with two equivalent Be(1)P4 tetrahedra, corners with two equivalent Be(2)P4 tetrahedra, corners with two equivalent P(1)Be2P2 tetrahedra, corners with two equivalent P(3)Be2P2 tetrahedra, corners with two equivalent P(4)Be2P2 tetrahedra, and corners with two equivalent P(5)Be2P2 tetrahedra. In the third P site, P(3) is bonded to two equivalent Be(2) and two equivalent P(5) atoms to form distorted PBe2P2 tetrahedra that share corners with two equivalent Be(1)P4 tetrahedra, corners with two equivalent Be(2)P4 tetrahedra, corners with two equivalent P(4)Be2P2 tetrahedra, corners with two equivalent P(5)Be2P2 tetrahedra, and corners with four equivalent P(2)Be2P2 tetrahedra. In the fourth P site, P(4) is bonded to one Be(1), one Be(2), one P(1), and one P(2) atom to form distorted PBe2P2 tetrahedra that share  a cornercorner with one Be(2)P4 tetrahedra,  a cornercorner with one P(1)Be2P2 tetrahedra,  a cornercorner with one P(3)Be2P2 tetrahedra,  a cornercorner with one P(4)Be2P2 tetrahedra, corners with two equivalent P(2)Be2P2 tetrahedra, corners with three equivalent Be(1)P4 tetrahedra, and corners with three equivalent P(5)Be2P2 tetrahedra. In the fifth P site, P(5) is bonded to one Be(1), one Be(2), one P(2), and one P(3) atom to form distorted PBe2P2 tetrahedra that share  a cornercorner with one Be(1)P4 tetrahedra,  a cornercorner with one P(1)Be2P2 tetrahedra,  a cornercorner with one P(3)Be2P2 tetrahedra,  a cornercorner with one P(5)Be2P2 tetrahedra, corners with two equivalent P(2)Be2P2 tetrahedra, corners with three equivalent Be(2)P4 tetrahedra, and corners with three equivalent P(4)Be2P2 tetrahedra. is represented by the CIF file [CIF]
data_BeP2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.096
_cell_length_b   7.096
_cell_length_c   7.918
_cell_angle_alpha   102.931
_cell_angle_beta   102.931
_cell_angle_gamma   89.993
_symmetry_Int_Tables_number   1
_cell_volume   378.158
_cell_formula_units_Z   8
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
  Be  Be0  1  0.294  0.047  0.176  1.0
  Be  Be1  1  0.294  0.540  0.175  1.0
  Be  Be2  1  0.831  0.335  0.325  1.0
  Be  Be3  1  0.831  0.828  0.324  1.0
  Be  Be4  1  0.665  0.169  0.675  1.0
  Be  Be5  1  0.172  0.169  0.676  1.0
  Be  Be6  1  0.460  0.706  0.825  1.0
  Be  Be7  1  0.953  0.706  0.824  1.0
  P  P8  1  0.121  0.879  0.500  1.0
  P  P9  1  0.628  0.879  0.497  1.0
  P  P10  1  0.121  0.372  0.503  1.0
  P  P11  1  0.629  0.371  0.500  1.0
  P  P12  1  0.332  0.830  0.330  1.0
  P  P13  1  0.333  0.335  0.335  1.0
  P  P14  1  0.792  0.540  0.165  1.0
  P  P15  1  0.793  0.045  0.170  1.0
  P  P16  1  0.665  0.667  0.665  1.0
  P  P17  1  0.170  0.668  0.670  1.0
  P  P18  1  0.460  0.208  0.835  1.0
  P  P19  1  0.496  0.504  0.000  1.0
  P  P20  1  0.004  0.503  0.997  1.0
  P  P21  1  0.497  0.996  0.003  1.0
  P  P22  1  0.955  0.207  0.830  1.0
  P  P23  1  0.004  0.996  0.000  1.0
[/CIF]
.
The structure described by BeP2 crystallizes in the monoclinic C2/c space group. There are two inequivalent Be sites. In the first Be site, Be(1) is bonded to one P(1), one P(2), one P(4), and one P(5) atom to form BeP4 tetrahedra that share  a cornercorner with one Be(1)P4 tetrahedra,  a cornercorner with one P(1)Be2P2 tetrahedra,  a cornercorner with one P(3)Be2P2 tetrahedra,  a cornercorner with one P(5)Be2P2 tetrahedra, corners with two equivalent P(2)Be2P2 tetrahedra, corners with three equivalent Be(2)P4 tetrahedra, and corners with three equivalent P(4)Be2P2 tetrahedra. In the second Be site, Be(2) is bonded to one P(2), one P(3), one P(4), and one P(5) atom to form BeP4 tetrahedra that share  a cornercorner with one Be(2)P4 tetrahedra,  a cornercorner with one P(1)Be2P2 tetrahedra,  a cornercorner with one P(3)Be2P2 tetrahedra,  a cornercorner with one P(4)Be2P2 tetrahedra, corners with two equivalent P(2)Be2P2 tetrahedra, corners with three equivalent Be(1)P4 tetrahedra, and corners with three equivalent P(5)Be2P2 tetrahedra. There are five inequivalent P sites. In the first P site, P(1) is bonded to two equivalent Be(1) and two equivalent P(4) atoms to form distorted PBe2P2 tetrahedra that share corners with two equivalent Be(1)P4 tetrahedra, corners with two equivalent Be(2)P4 tetrahedra, corners with two equivalent P(4)Be2P2 tetrahedra, corners with two equivalent P(5)Be2P2 tetrahedra, and corners with four equivalent P(2)Be2P2 tetrahedra. In the second P site, P(2) is bonded to one Be(1), one Be(2), one P(4), and one P(5) atom to form distorted PBe2P2 tetrahedra that share corners with two equivalent Be(1)P4 tetrahedra, corners with two equivalent Be(2)P4 tetrahedra, corners with two equivalent P(1)Be2P2 tetrahedra, corners with two equivalent P(3)Be2P2 tetrahedra, corners with two equivalent P(4)Be2P2 tetrahedra, and corners with two equivalent P(5)Be2P2 tetrahedra. In the third P site, P(3) is bonded to two equivalent Be(2) and two equivalent P(5) atoms to form distorted PBe2P2 tetrahedra that share corners with two equivalent Be(1)P4 tetrahedra, corners with two equivalent Be(2)P4 tetrahedra, corners with two equivalent P(4)Be2P2 tetrahedra, corners with two equivalent P(5)Be2P2 tetrahedra, and corners with four equivalent P(2)Be2P2 tetrahedra. In the fourth P site, P(4) is bonded to one Be(1), one Be(2), one P(1), and one P(2) atom to form distorted PBe2P2 tetrahedra that share  a cornercorner with one Be(2)P4 tetrahedra,  a cornercorner with one P(1)Be2P2 tetrahedra,  a cornercorner with one P(3)Be2P2 tetrahedra,  a cornercorner with one P(4)Be2P2 tetrahedra, corners with two equivalent P(2)Be2P2 tetrahedra, corners with three equivalent Be(1)P4 tetrahedra, and corners with three equivalent P(5)Be2P2 tetrahedra. In the fifth P site, P(5) is bonded to one Be(1), one Be(2), one P(2), and one P(3) atom to form distorted PBe2P2 tetrahedra that share  a cornercorner with one Be(1)P4 tetrahedra,  a cornercorner with one P(1)Be2P2 tetrahedra,  a cornercorner with one P(3)Be2P2 tetrahedra,  a cornercorner with one P(5)Be2P2 tetrahedra, corners with two equivalent P(2)Be2P2 tetrahedra, corners with three equivalent Be(2)P4 tetrahedra, and corners with three equivalent P(4)Be2P2 tetrahedra. is represented by the CIF file [CIF]
data_BeP2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.096
_cell_length_b   7.096
_cell_length_c   7.918
_cell_angle_alpha   102.931
_cell_angle_beta   102.931
_cell_angle_gamma   89.993
_symmetry_Int_Tables_number   1
_cell_volume   378.158
_cell_formula_units_Z   8
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
  Be  Be0  1  0.294  0.047  0.176  1.0
  Be  Be1  1  0.294  0.540  0.175  1.0
  Be  Be2  1  0.831  0.335  0.325  1.0
  Be  Be3  1  0.831  0.828  0.324  1.0
  Be  Be4  1  0.665  0.169  0.675  1.0
  Be  Be5  1  0.172  0.169  0.676  1.0
  Be  Be6  1  0.460  0.706  0.825  1.0
  Be  Be7  1  0.953  0.706  0.824  1.0
  P  P8  1  0.121  0.879  0.500  1.0
  P  P9  1  0.628  0.879  0.497  1.0
  P  P10  1  0.121  0.372  0.503  1.0
  P  P11  1  0.629  0.371  0.500  1.0
  P  P12  1  0.332  0.830  0.330  1.0
  P  P13  1  0.333  0.335  0.335  1.0
  P  P14  1  0.792  0.540  0.165  1.0
  P  P15  1  0.793  0.045  0.170  1.0
  P  P16  1  0.665  0.667  0.665  1.0
  P  P17  1  0.170  0.668  0.670  1.0
  P  P18  1  0.460  0.208  0.835  1.0
  P  P19  1  0.496  0.504  0.000  1.0
  P  P20  1  0.004  0.503  0.997  1.0
  P  P21  1  0.497  0.996  0.003  1.0
  P  P22  1  0.955  0.207  0.830  1.0
  P  P23  1  0.004  0.996  0.000  1.0
[/CIF]
.