The structure described by CrZnSiO5 crystallizes in the triclinic P1 space group. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(10), one O(2), one O(4), one O(5), one O(7), and one O(9) atom to form CrO6 octahedra that share corners with two equivalent Cr(2)O6 octahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, edges with two equivalent Zn(1)O6 pentagonal pyramids, and edges with two equivalent Zn(2)O6 pentagonal pyramids. The corner-sharing octahedral tilt angles are 38°. In the second Cr site, Cr(2) is bonded to one O(1), one O(10), one O(3), one O(6), one O(8), and one O(9) atom to form CrO6 octahedra that share corners with two equivalent Cr(1)O6 octahedra,  a cornercorner with one Zn(1)O6 pentagonal pyramid,  a cornercorner with one Zn(2)O6 pentagonal pyramid, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Zn(1)O6 pentagonal pyramid, and  an edgeedge with one Zn(2)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles are 38°. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(10), one O(2), one O(3), one O(4), one O(7), and one O(8) atom to form distorted ZnO6 pentagonal pyramids that share  a cornercorner with one Cr(2)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Cr(2)O6 octahedra, edges with two equivalent Cr(1)O6 octahedra,  an edgeedge with one Zn(2)O6 pentagonal pyramid, and  an edgeedge with one Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 44°. In the second Zn site, Zn(2) is bonded to one O(1), one O(2), one O(4), one O(5), one O(6), and one O(9) atom to form distorted ZnO6 pentagonal pyramids that share  a cornercorner with one Cr(2)O6 octahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra,  an edgeedge with one Cr(2)O6 octahedra, edges with two equivalent Cr(1)O6 octahedra,  an edgeedge with one Zn(1)O6 pentagonal pyramid, and  an edgeedge with one Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 44°. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(2), one O(7), and one O(8) atom to form SiO4 tetrahedra that share corners with two equivalent Cr(1)O6 octahedra, corners with two equivalent Cr(2)O6 octahedra,  a cornercorner with one Zn(1)O6 pentagonal pyramid, corners with two equivalent Zn(2)O6 pentagonal pyramids, and  an edgeedge with one Zn(1)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles range from 27-51°. In the second Si site, Si(2) is bonded to one O(3), one O(4), one O(5), and one O(6) atom to form SiO4 tetrahedra that share corners with two equivalent Cr(1)O6 octahedra, corners with two equivalent Cr(2)O6 octahedra,  a cornercorner with one Zn(2)O6 pentagonal pyramid, corners with two equivalent Zn(1)O6 pentagonal pyramids, and  an edgeedge with one Zn(2)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles range from 27-51°. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Cr(2), one Zn(2), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Cr(1), one Zn(1), one Zn(2), and one Si(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Cr(2), one Zn(1), and one Si(2) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Cr(1), one Zn(1), one Zn(2), and one Si(2) atom. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one Cr(1), one Zn(2), and one Si(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Cr(2), one Zn(2), and one Si(2) atom. In the seventh O site, O(7) is bonded in a distorted T-shaped geometry to one Cr(1), one Zn(1), and one Si(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Cr(2), one Zn(1), and one Si(1) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Cr(1), one Cr(2), and one Zn(2) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Cr(1), one Cr(2), and one Zn(1) atom. is represented by the CIF file [CIF]
data_ZnCrSiO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.423
_cell_length_b   7.079
_cell_length_c   8.133
_cell_angle_alpha   90.043
_cell_angle_beta   40.730
_cell_angle_gamma   72.277
_symmetry_Int_Tables_number   1
_cell_volume   180.113
_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
  Zn  Zn0  1  0.402  0.240  0.730  1.0
  Zn  Zn1  1  0.603  0.728  0.258  1.0
  Cr  Cr2  1  0.498  0.487  0.997  1.0
  Cr  Cr3  1  0.500  0.986  0.995  1.0
  Si  Si4  1  0.542  0.230  0.320  1.0
  Si  Si5  1  0.454  0.742  0.672  1.0
  O  O6  1  0.519  0.040  0.225  1.0
  O  O7  1  0.663  0.387  0.147  1.0
  O  O8  1  0.480  0.932  0.764  1.0
  O  O9  1  0.330  0.587  0.849  1.0
  O  O10  1  0.892  0.606  0.340  1.0
  O  O11  1  0.122  0.835  0.680  1.0
  O  O12  1  0.107  0.362  0.653  1.0
  O  O13  1  0.878  0.134  0.309  1.0
  O  O14  1  0.490  0.737  0.075  1.0
  O  O15  1  0.509  0.234  0.915  1.0
[/CIF]
.
The structure described by CrZnSiO5 crystallizes in the triclinic P1 space group. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(10), one O(2), one O(4), one O(5), one O(7), and one O(9) atom to form CrO6 octahedra that share corners with two equivalent Cr(2)O6 octahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, edges with two equivalent Zn(1)O6 pentagonal pyramids, and edges with two equivalent Zn(2)O6 pentagonal pyramids. The corner-sharing octahedral tilt angles are 38°. In the second Cr site, Cr(2) is bonded to one O(1), one O(10), one O(3), one O(6), one O(8), and one O(9) atom to form CrO6 octahedra that share corners with two equivalent Cr(1)O6 octahedra,  a cornercorner with one Zn(1)O6 pentagonal pyramid,  a cornercorner with one Zn(2)O6 pentagonal pyramid, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Zn(1)O6 pentagonal pyramid, and  an edgeedge with one Zn(2)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles are 38°. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(10), one O(2), one O(3), one O(4), one O(7), and one O(8) atom to form distorted ZnO6 pentagonal pyramids that share  a cornercorner with one Cr(2)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Cr(2)O6 octahedra, edges with two equivalent Cr(1)O6 octahedra,  an edgeedge with one Zn(2)O6 pentagonal pyramid, and  an edgeedge with one Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 44°. In the second Zn site, Zn(2) is bonded to one O(1), one O(2), one O(4), one O(5), one O(6), and one O(9) atom to form distorted ZnO6 pentagonal pyramids that share  a cornercorner with one Cr(2)O6 octahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra,  an edgeedge with one Cr(2)O6 octahedra, edges with two equivalent Cr(1)O6 octahedra,  an edgeedge with one Zn(1)O6 pentagonal pyramid, and  an edgeedge with one Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 44°. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(2), one O(7), and one O(8) atom to form SiO4 tetrahedra that share corners with two equivalent Cr(1)O6 octahedra, corners with two equivalent Cr(2)O6 octahedra,  a cornercorner with one Zn(1)O6 pentagonal pyramid, corners with two equivalent Zn(2)O6 pentagonal pyramids, and  an edgeedge with one Zn(1)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles range from 27-51°. In the second Si site, Si(2) is bonded to one O(3), one O(4), one O(5), and one O(6) atom to form SiO4 tetrahedra that share corners with two equivalent Cr(1)O6 octahedra, corners with two equivalent Cr(2)O6 octahedra,  a cornercorner with one Zn(2)O6 pentagonal pyramid, corners with two equivalent Zn(1)O6 pentagonal pyramids, and  an edgeedge with one Zn(2)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles range from 27-51°. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Cr(2), one Zn(2), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Cr(1), one Zn(1), one Zn(2), and one Si(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Cr(2), one Zn(1), and one Si(2) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Cr(1), one Zn(1), one Zn(2), and one Si(2) atom. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one Cr(1), one Zn(2), and one Si(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Cr(2), one Zn(2), and one Si(2) atom. In the seventh O site, O(7) is bonded in a distorted T-shaped geometry to one Cr(1), one Zn(1), and one Si(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Cr(2), one Zn(1), and one Si(1) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Cr(1), one Cr(2), and one Zn(2) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Cr(1), one Cr(2), and one Zn(1) atom. is represented by the CIF file [CIF]
data_ZnCrSiO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.423
_cell_length_b   7.079
_cell_length_c   8.133
_cell_angle_alpha   90.043
_cell_angle_beta   40.730
_cell_angle_gamma   72.277
_symmetry_Int_Tables_number   1
_cell_volume   180.113
_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
  Zn  Zn0  1  0.402  0.240  0.730  1.0
  Zn  Zn1  1  0.603  0.728  0.258  1.0
  Cr  Cr2  1  0.498  0.487  0.997  1.0
  Cr  Cr3  1  0.500  0.986  0.995  1.0
  Si  Si4  1  0.542  0.230  0.320  1.0
  Si  Si5  1  0.454  0.742  0.672  1.0
  O  O6  1  0.519  0.040  0.225  1.0
  O  O7  1  0.663  0.387  0.147  1.0
  O  O8  1  0.480  0.932  0.764  1.0
  O  O9  1  0.330  0.587  0.849  1.0
  O  O10  1  0.892  0.606  0.340  1.0
  O  O11  1  0.122  0.835  0.680  1.0
  O  O12  1  0.107  0.362  0.653  1.0
  O  O13  1  0.878  0.134  0.309  1.0
  O  O14  1  0.490  0.737  0.075  1.0
  O  O15  1  0.509  0.234  0.915  1.0
[/CIF]
.