The material described by SrIn2(PO4)4 crystallizes in the orthorhombic C222_1 space group. Sr(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(4), and two equivalent O(6) atoms. There are two inequivalent In sites. In the first In site, In(1) is bonded to two equivalent O(2), two equivalent O(5), and two equivalent O(8) atoms to form InO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra and corners with four equivalent P(2)O4 tetrahedra. In the second In site, In(2) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(7) atoms to form InO6 octahedra that share corners with two equivalent P(2)O4 tetrahedra and corners with four equivalent P(1)O4 tetrahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one In(1)O6 octahedra and corners with two equivalent In(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 37-47°. In the second P site, P(2) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one In(2)O6 octahedra and corners with two equivalent In(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 39-43°. There are eight inequivalent O sites. In the first O site, O(2) is bonded in a 3-coordinate geometry to one Sr(1), one In(1), and one P(1) atom. In the second O site, O(3) is bonded in a distorted bent 150 degrees geometry to one In(2) and one P(1) atom. In the third O site, O(4) is bonded in a distorted trigonal planar geometry to one Sr(1), one In(2), and one P(1) atom. In the fourth O site, O(5) is bonded in a bent 150 degrees geometry to one In(1) and one P(2) atom. In the fifth O site, O(6) is bonded in a distorted single-bond geometry to one Sr(1) and one P(2) atom. In the sixth O site, O(7) is bonded in a distorted bent 150 degrees geometry to one In(2) and one P(2) atom. In the seventh O site, O(8) is bonded in a distorted bent 150 degrees geometry to one In(1) and one P(2) atom. In the eighth O site, O(1) is bonded in a distorted water-like geometry to one Sr(1) and one P(1) atom. is represented by the CIF file [CIF]
data_SrIn2(PO4)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.840
_cell_length_b   6.840
_cell_length_c   14.103
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   91.448
_symmetry_Int_Tables_number   1
_cell_volume   659.583
_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  0.226  0.226  0.000  1.0
  Sr  Sr1  1  0.774  0.774  0.500  1.0
  In  In2  1  0.850  0.150  0.750  1.0
  In  In3  1  0.150  0.850  0.250  1.0
  In  In4  1  0.642  0.642  0.000  1.0
  In  In5  1  0.358  0.358  0.500  1.0
  P  P6  1  0.745  0.150  0.992  1.0
  P  P7  1  0.150  0.745  0.008  1.0
  P  P8  1  0.255  0.850  0.492  1.0
  P  P9  1  0.850  0.255  0.508  1.0
  P  P10  1  0.353  0.247  0.738  1.0
  P  P11  1  0.247  0.353  0.262  1.0
  P  P12  1  0.647  0.753  0.238  1.0
  P  P13  1  0.753  0.647  0.762  1.0
  O  O14  1  0.171  0.882  0.922  1.0
  O  O15  1  0.882  0.171  0.078  1.0
  O  O16  1  0.829  0.118  0.422  1.0
  O  O17  1  0.118  0.829  0.578  1.0
  O  O18  1  0.831  0.121  0.597  1.0
  O  O19  1  0.121  0.831  0.403  1.0
  O  O20  1  0.169  0.879  0.097  1.0
  O  O21  1  0.879  0.169  0.903  1.0
  O  O22  1  0.620  0.958  0.994  1.0
  O  O23  1  0.958  0.620  0.006  1.0
  O  O24  1  0.380  0.042  0.494  1.0
  O  O25  1  0.042  0.380  0.506  1.0
  O  O26  1  0.599  0.320  0.993  1.0
  O  O27  1  0.320  0.599  0.007  1.0
  O  O28  1  0.401  0.680  0.493  1.0
  O  O29  1  0.680  0.401  0.507  1.0
  O  O30  1  0.535  0.127  0.755  1.0
  O  O31  1  0.127  0.535  0.245  1.0
  O  O32  1  0.465  0.873  0.255  1.0
  O  O33  1  0.873  0.465  0.745  1.0
  O  O34  1  0.641  0.702  0.670  1.0
  O  O35  1  0.702  0.641  0.330  1.0
  O  O36  1  0.359  0.298  0.170  1.0
  O  O37  1  0.298  0.359  0.830  1.0
  O  O38  1  0.619  0.623  0.848  1.0
  O  O39  1  0.623  0.619  0.152  1.0
  O  O40  1  0.381  0.377  0.348  1.0
  O  O41  1  0.377  0.381  0.652  1.0
  O  O42  1  0.165  0.117  0.731  1.0
  O  O43  1  0.117  0.165  0.269  1.0
  O  O44  1  0.835  0.883  0.231  1.0
  O  O45  1  0.883  0.835  0.769  1.0
[/CIF]
.
The material described by SrIn2(PO4)4 crystallizes in the orthorhombic C222_1 space group. Sr(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(4), and two equivalent O(6) atoms. There are two inequivalent In sites. In the first In site, In(1) is bonded to two equivalent O(2), two equivalent O(5), and two equivalent O(8) atoms to form InO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra and corners with four equivalent P(2)O4 tetrahedra. In the second In site, In(2) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(7) atoms to form InO6 octahedra that share corners with two equivalent P(2)O4 tetrahedra and corners with four equivalent P(1)O4 tetrahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one In(1)O6 octahedra and corners with two equivalent In(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 37-47°. In the second P site, P(2) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one In(2)O6 octahedra and corners with two equivalent In(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 39-43°. There are eight inequivalent O sites. In the first O site, O(2) is bonded in a 3-coordinate geometry to one Sr(1), one In(1), and one P(1) atom. In the second O site, O(3) is bonded in a distorted bent 150 degrees geometry to one In(2) and one P(1) atom. In the third O site, O(4) is bonded in a distorted trigonal planar geometry to one Sr(1), one In(2), and one P(1) atom. In the fourth O site, O(5) is bonded in a bent 150 degrees geometry to one In(1) and one P(2) atom. In the fifth O site, O(6) is bonded in a distorted single-bond geometry to one Sr(1) and one P(2) atom. In the sixth O site, O(7) is bonded in a distorted bent 150 degrees geometry to one In(2) and one P(2) atom. In the seventh O site, O(8) is bonded in a distorted bent 150 degrees geometry to one In(1) and one P(2) atom. In the eighth O site, O(1) is bonded in a distorted water-like geometry to one Sr(1) and one P(1) atom. is represented by the CIF file [CIF]
data_SrIn2(PO4)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.840
_cell_length_b   6.840
_cell_length_c   14.103
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   91.448
_symmetry_Int_Tables_number   1
_cell_volume   659.583
_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  0.226  0.226  0.000  1.0
  Sr  Sr1  1  0.774  0.774  0.500  1.0
  In  In2  1  0.850  0.150  0.750  1.0
  In  In3  1  0.150  0.850  0.250  1.0
  In  In4  1  0.642  0.642  0.000  1.0
  In  In5  1  0.358  0.358  0.500  1.0
  P  P6  1  0.745  0.150  0.992  1.0
  P  P7  1  0.150  0.745  0.008  1.0
  P  P8  1  0.255  0.850  0.492  1.0
  P  P9  1  0.850  0.255  0.508  1.0
  P  P10  1  0.353  0.247  0.738  1.0
  P  P11  1  0.247  0.353  0.262  1.0
  P  P12  1  0.647  0.753  0.238  1.0
  P  P13  1  0.753  0.647  0.762  1.0
  O  O14  1  0.171  0.882  0.922  1.0
  O  O15  1  0.882  0.171  0.078  1.0
  O  O16  1  0.829  0.118  0.422  1.0
  O  O17  1  0.118  0.829  0.578  1.0
  O  O18  1  0.831  0.121  0.597  1.0
  O  O19  1  0.121  0.831  0.403  1.0
  O  O20  1  0.169  0.879  0.097  1.0
  O  O21  1  0.879  0.169  0.903  1.0
  O  O22  1  0.620  0.958  0.994  1.0
  O  O23  1  0.958  0.620  0.006  1.0
  O  O24  1  0.380  0.042  0.494  1.0
  O  O25  1  0.042  0.380  0.506  1.0
  O  O26  1  0.599  0.320  0.993  1.0
  O  O27  1  0.320  0.599  0.007  1.0
  O  O28  1  0.401  0.680  0.493  1.0
  O  O29  1  0.680  0.401  0.507  1.0
  O  O30  1  0.535  0.127  0.755  1.0
  O  O31  1  0.127  0.535  0.245  1.0
  O  O32  1  0.465  0.873  0.255  1.0
  O  O33  1  0.873  0.465  0.745  1.0
  O  O34  1  0.641  0.702  0.670  1.0
  O  O35  1  0.702  0.641  0.330  1.0
  O  O36  1  0.359  0.298  0.170  1.0
  O  O37  1  0.298  0.359  0.830  1.0
  O  O38  1  0.619  0.623  0.848  1.0
  O  O39  1  0.623  0.619  0.152  1.0
  O  O40  1  0.381  0.377  0.348  1.0
  O  O41  1  0.377  0.381  0.652  1.0
  O  O42  1  0.165  0.117  0.731  1.0
  O  O43  1  0.117  0.165  0.269  1.0
  O  O44  1  0.835  0.883  0.231  1.0
  O  O45  1  0.883  0.835  0.769  1.0
[/CIF]
.