The crystal structure described by V3CrSn2(PO4)6 crystallizes in the trigonal R3 space group. There are three inequivalent V sites. In the first V site, V(1) is bonded to three equivalent O(4) and three equivalent O(8) atoms to form VO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra and corners with three equivalent P(2)O4 tetrahedra. In the second V site, V(2) is bonded to three equivalent O(2) and three equivalent O(5) atoms to form VO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra and corners with three equivalent P(2)O4 tetrahedra. In the third V site, V(3) is bonded to three equivalent O(1) and three equivalent O(7) atoms to form VO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra and corners with three equivalent P(2)O4 tetrahedra. Cr(1) is bonded to three equivalent O(3) and three equivalent O(6) atoms to form CrO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra and corners with three equivalent P(2)O4 tetrahedra. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a distorted hexagonal planar geometry to three equivalent O(2) and three equivalent O(6) atoms. In the second Sn site, Sn(2) is bonded in a distorted hexagonal planar geometry to three equivalent O(4) and three equivalent O(7) atoms. 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 V(1)O6 octahedra,  a cornercorner with one V(2)O6 octahedra,  a cornercorner with one V(3)O6 octahedra, and  a cornercorner with one Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 28-37°. 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 V(1)O6 octahedra,  a cornercorner with one V(2)O6 octahedra,  a cornercorner with one V(3)O6 octahedra, and  a cornercorner with one Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 27-38°. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one V(3) and one P(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one V(2), one Sn(1), and one P(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Cr(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one V(1), one Sn(2), and one P(1) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one V(2) and one P(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Cr(1), one Sn(1), and one P(2) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one V(3), one Sn(2), and one P(2) atom. In the eighth O site, O(8) is bonded in a bent 150 degrees geometry to one V(1) and one P(2) atom. is represented by the CIF card [CIF]
data_V3CrSn2(PO4)6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.995
_cell_length_b   8.995
_cell_length_c   8.995
_cell_angle_alpha   57.141
_cell_angle_beta   57.141
_cell_angle_gamma   57.141
_symmetry_Int_Tables_number   1
_cell_volume   480.769
_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
  V  V0  1  0.648  0.648  0.648  1.0
  V  V1  1  0.853  0.853  0.853  1.0
  V  V2  1  0.352  0.352  0.352  1.0
  Cr  Cr3  1  0.147  0.147  0.147  1.0
  Sn  Sn4  1  0.002  0.002  0.002  1.0
  Sn  Sn5  1  0.501  0.501  0.501  1.0
  P  P6  1  0.250  0.534  0.964  1.0
  P  P7  1  0.964  0.250  0.534  1.0
  P  P8  1  0.534  0.964  0.250  1.0
  P  P9  1  0.464  0.037  0.750  1.0
  P  P10  1  0.037  0.750  0.464  1.0
  P  P11  1  0.750  0.464  0.037  1.0
  O  O12  1  0.130  0.283  0.508  1.0
  O  O13  1  0.508  0.130  0.283  1.0
  O  O14  1  0.283  0.508  0.130  1.0
  O  O15  1  0.076  0.720  0.938  1.0
  O  O16  1  0.222  0.370  0.986  1.0
  O  O17  1  0.425  0.565  0.779  1.0
  O  O18  1  0.938  0.076  0.720  1.0
  O  O19  1  0.779  0.425  0.565  1.0
  O  O20  1  0.629  0.009  0.783  1.0
  O  O21  1  0.565  0.779  0.425  1.0
  O  O22  1  0.280  0.059  0.924  1.0
  O  O23  1  0.009  0.783  0.629  1.0
  O  O24  1  0.986  0.222  0.370  1.0
  O  O25  1  0.720  0.938  0.076  1.0
  O  O26  1  0.438  0.221  0.575  1.0
  O  O27  1  0.370  0.986  0.222  1.0
  O  O28  1  0.221  0.575  0.438  1.0
  O  O29  1  0.059  0.924  0.280  1.0
  O  O30  1  0.575  0.438  0.221  1.0
  O  O31  1  0.783  0.629  0.009  1.0
  O  O32  1  0.924  0.280  0.059  1.0
  O  O33  1  0.713  0.494  0.872  1.0
  O  O34  1  0.494  0.872  0.713  1.0
  O  O35  1  0.872  0.713  0.494  1.0
[/CIF]
.
The crystal structure described by V3CrSn2(PO4)6 crystallizes in the trigonal R3 space group. There are three inequivalent V sites. In the first V site, V(1) is bonded to three equivalent O(4) and three equivalent O(8) atoms to form VO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra and corners with three equivalent P(2)O4 tetrahedra. In the second V site, V(2) is bonded to three equivalent O(2) and three equivalent O(5) atoms to form VO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra and corners with three equivalent P(2)O4 tetrahedra. In the third V site, V(3) is bonded to three equivalent O(1) and three equivalent O(7) atoms to form VO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra and corners with three equivalent P(2)O4 tetrahedra. Cr(1) is bonded to three equivalent O(3) and three equivalent O(6) atoms to form CrO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra and corners with three equivalent P(2)O4 tetrahedra. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a distorted hexagonal planar geometry to three equivalent O(2) and three equivalent O(6) atoms. In the second Sn site, Sn(2) is bonded in a distorted hexagonal planar geometry to three equivalent O(4) and three equivalent O(7) atoms. 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 V(1)O6 octahedra,  a cornercorner with one V(2)O6 octahedra,  a cornercorner with one V(3)O6 octahedra, and  a cornercorner with one Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 28-37°. 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 V(1)O6 octahedra,  a cornercorner with one V(2)O6 octahedra,  a cornercorner with one V(3)O6 octahedra, and  a cornercorner with one Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 27-38°. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one V(3) and one P(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one V(2), one Sn(1), and one P(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Cr(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one V(1), one Sn(2), and one P(1) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one V(2) and one P(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Cr(1), one Sn(1), and one P(2) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one V(3), one Sn(2), and one P(2) atom. In the eighth O site, O(8) is bonded in a bent 150 degrees geometry to one V(1) and one P(2) atom. is represented by the CIF card [CIF]
data_V3CrSn2(PO4)6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.995
_cell_length_b   8.995
_cell_length_c   8.995
_cell_angle_alpha   57.141
_cell_angle_beta   57.141
_cell_angle_gamma   57.141
_symmetry_Int_Tables_number   1
_cell_volume   480.769
_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
  V  V0  1  0.648  0.648  0.648  1.0
  V  V1  1  0.853  0.853  0.853  1.0
  V  V2  1  0.352  0.352  0.352  1.0
  Cr  Cr3  1  0.147  0.147  0.147  1.0
  Sn  Sn4  1  0.002  0.002  0.002  1.0
  Sn  Sn5  1  0.501  0.501  0.501  1.0
  P  P6  1  0.250  0.534  0.964  1.0
  P  P7  1  0.964  0.250  0.534  1.0
  P  P8  1  0.534  0.964  0.250  1.0
  P  P9  1  0.464  0.037  0.750  1.0
  P  P10  1  0.037  0.750  0.464  1.0
  P  P11  1  0.750  0.464  0.037  1.0
  O  O12  1  0.130  0.283  0.508  1.0
  O  O13  1  0.508  0.130  0.283  1.0
  O  O14  1  0.283  0.508  0.130  1.0
  O  O15  1  0.076  0.720  0.938  1.0
  O  O16  1  0.222  0.370  0.986  1.0
  O  O17  1  0.425  0.565  0.779  1.0
  O  O18  1  0.938  0.076  0.720  1.0
  O  O19  1  0.779  0.425  0.565  1.0
  O  O20  1  0.629  0.009  0.783  1.0
  O  O21  1  0.565  0.779  0.425  1.0
  O  O22  1  0.280  0.059  0.924  1.0
  O  O23  1  0.009  0.783  0.629  1.0
  O  O24  1  0.986  0.222  0.370  1.0
  O  O25  1  0.720  0.938  0.076  1.0
  O  O26  1  0.438  0.221  0.575  1.0
  O  O27  1  0.370  0.986  0.222  1.0
  O  O28  1  0.221  0.575  0.438  1.0
  O  O29  1  0.059  0.924  0.280  1.0
  O  O30  1  0.575  0.438  0.221  1.0
  O  O31  1  0.783  0.629  0.009  1.0
  O  O32  1  0.924  0.280  0.059  1.0
  O  O33  1  0.713  0.494  0.872  1.0
  O  O34  1  0.494  0.872  0.713  1.0
  O  O35  1  0.872  0.713  0.494  1.0
[/CIF]
.