The material described by Sr3Ga2P4 crystallizes in the monoclinic C2/c space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 6-coordinate geometry to two equivalent P(2) and four equivalent P(1) atoms. In the second Sr site, Sr(2) is bonded to two equivalent P(1) and four equivalent P(2) atoms to form distorted SrP6 octahedra that share corners with four equivalent Ga(1)P4 tetrahedra, edges with two equivalent Sr(2)P6 octahedra, and edges with four equivalent Ga(1)P4 tetrahedra. Ga(1) is bonded to two equivalent P(1) and two equivalent P(2) atoms to form distorted GaP4 tetrahedra that share corners with two equivalent Sr(2)P6 octahedra, corners with two equivalent Ga(1)P4 tetrahedra, edges with two equivalent Sr(2)P6 octahedra, and  an edgeedge with one Ga(1)P4 tetrahedra. The corner-sharing octahedral tilt angles range from 32-55°. There are two inequivalent P sites. In the first P site, P(1) is bonded in a 7-coordinate geometry to one Sr(2), four equivalent Sr(1), and two equivalent Ga(1) atoms. In the second P site, P(2) is bonded to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Ga(1) atoms to form a mixture of distorted corner and edge-sharing PSr4Ga2 pentagonal pyramids. is represented by the CIF card [CIF]
data_Sr3(GaP2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.355
_cell_length_b   8.355
_cell_length_c   6.660
_cell_angle_alpha   89.683
_cell_angle_beta   89.683
_cell_angle_gamma   75.442
_symmetry_Int_Tables_number   1
_cell_volume   449.946
_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
  Sr  Sr0  1  0.005  0.748  0.539  1.0
  Sr  Sr1  1  0.252  0.995  0.961  1.0
  Sr  Sr2  1  0.995  0.252  0.461  1.0
  Sr  Sr3  1  0.748  0.005  0.039  1.0
  Sr  Sr4  1  0.400  0.600  0.250  1.0
  Sr  Sr5  1  0.600  0.400  0.750  1.0
  Ga  Ga6  1  0.824  0.583  0.083  1.0
  Ga  Ga7  1  0.417  0.176  0.417  1.0
  Ga  Ga8  1  0.176  0.417  0.917  1.0
  Ga  Ga9  1  0.583  0.824  0.583  1.0
  P  P10  1  0.057  0.703  0.023  1.0
  P  P11  1  0.297  0.943  0.477  1.0
  P  P12  1  0.943  0.297  0.977  1.0
  P  P13  1  0.703  0.057  0.523  1.0
  P  P14  1  0.740  0.577  0.424  1.0
  P  P15  1  0.423  0.260  0.076  1.0
  P  P16  1  0.260  0.423  0.576  1.0
  P  P17  1  0.577  0.740  0.924  1.0
[/CIF]
.
The material described by Sr3Ga2P4 crystallizes in the monoclinic C2/c space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 6-coordinate geometry to two equivalent P(2) and four equivalent P(1) atoms. In the second Sr site, Sr(2) is bonded to two equivalent P(1) and four equivalent P(2) atoms to form distorted SrP6 octahedra that share corners with four equivalent Ga(1)P4 tetrahedra, edges with two equivalent Sr(2)P6 octahedra, and edges with four equivalent Ga(1)P4 tetrahedra. Ga(1) is bonded to two equivalent P(1) and two equivalent P(2) atoms to form distorted GaP4 tetrahedra that share corners with two equivalent Sr(2)P6 octahedra, corners with two equivalent Ga(1)P4 tetrahedra, edges with two equivalent Sr(2)P6 octahedra, and  an edgeedge with one Ga(1)P4 tetrahedra. The corner-sharing octahedral tilt angles range from 32-55°. There are two inequivalent P sites. In the first P site, P(1) is bonded in a 7-coordinate geometry to one Sr(2), four equivalent Sr(1), and two equivalent Ga(1) atoms. In the second P site, P(2) is bonded to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Ga(1) atoms to form a mixture of distorted corner and edge-sharing PSr4Ga2 pentagonal pyramids. is represented by the CIF card [CIF]
data_Sr3(GaP2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.355
_cell_length_b   8.355
_cell_length_c   6.660
_cell_angle_alpha   89.683
_cell_angle_beta   89.683
_cell_angle_gamma   75.442
_symmetry_Int_Tables_number   1
_cell_volume   449.946
_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
  Sr  Sr0  1  0.005  0.748  0.539  1.0
  Sr  Sr1  1  0.252  0.995  0.961  1.0
  Sr  Sr2  1  0.995  0.252  0.461  1.0
  Sr  Sr3  1  0.748  0.005  0.039  1.0
  Sr  Sr4  1  0.400  0.600  0.250  1.0
  Sr  Sr5  1  0.600  0.400  0.750  1.0
  Ga  Ga6  1  0.824  0.583  0.083  1.0
  Ga  Ga7  1  0.417  0.176  0.417  1.0
  Ga  Ga8  1  0.176  0.417  0.917  1.0
  Ga  Ga9  1  0.583  0.824  0.583  1.0
  P  P10  1  0.057  0.703  0.023  1.0
  P  P11  1  0.297  0.943  0.477  1.0
  P  P12  1  0.943  0.297  0.977  1.0
  P  P13  1  0.703  0.057  0.523  1.0
  P  P14  1  0.740  0.577  0.424  1.0
  P  P15  1  0.423  0.260  0.076  1.0
  P  P16  1  0.260  0.423  0.576  1.0
  P  P17  1  0.577  0.740  0.924  1.0
[/CIF]
.