The structure described by MnZn2SiO6 crystallizes in the monoclinic P2_1/c space group. Mn(1) is bonded to one O(1), two equivalent O(5), and three equivalent O(6) atoms to form distorted MnO6 octahedra that share corners with four equivalent Mn(1)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with three equivalent Zn(1)O4 tetrahedra, and edges with two equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-53°. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form ZnO4 tetrahedra that share corners with three equivalent Mn(1)O6 octahedra, corners with two equivalent Zn(2)O4 tetrahedra, and corners with three equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 57-60°. In the second Zn site, Zn(2) is bonded to one O(2), one O(3), and two equivalent O(4) atoms to form ZnO4 tetrahedra that share corners with two equivalent Zn(1)O4 tetrahedra, corners with two equivalent Zn(2)O4 tetrahedra, and corners with four equivalent Si(1)O4 tetrahedra. Si(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SiO4 tetrahedra that share  a cornercorner with one Mn(1)O6 octahedra, corners with three equivalent Zn(1)O4 tetrahedra, and corners with four equivalent Zn(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 51°. There are six inequivalent O sites. In the first O site, O(5) is bonded in a trigonal planar geometry to two equivalent Mn(1) and one Zn(1) atom. In the second O site, O(6) is bonded in a 3-coordinate geometry to three equivalent Mn(1) atoms. In the third O site, O(1) is bonded in a trigonal planar geometry to one Mn(1), one Zn(1), and one Si(1) atom. In the fourth O site, O(2) is bonded in a trigonal non-coplanar geometry to one Zn(1), one Zn(2), and one Si(1) atom. In the fifth O site, O(3) is bonded in a trigonal planar geometry to one Zn(1), one Zn(2), and one Si(1) atom. In the sixth O site, O(4) is bonded in a trigonal planar geometry to two equivalent Zn(2) and one Si(1) atom. is represented by the CIF card [CIF]
data_MnZn2SiO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.220
_cell_length_b   8.001
_cell_length_c   11.528
_cell_angle_alpha   81.335
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   475.966
_cell_formula_units_Z   4
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
  Mn  Mn0  1  0.243  0.064  0.960  1.0
  Mn  Mn1  1  0.743  0.436  0.040  1.0
  Mn  Mn2  1  0.757  0.936  0.040  1.0
  Mn  Mn3  1  0.257  0.564  0.960  1.0
  Zn  Zn4  1  0.913  0.366  0.772  1.0
  Zn  Zn5  1  0.413  0.134  0.228  1.0
  Zn  Zn6  1  0.087  0.634  0.228  1.0
  Zn  Zn7  1  0.587  0.866  0.772  1.0
  Zn  Zn8  1  0.578  0.222  0.580  1.0
  Zn  Zn9  1  0.078  0.278  0.420  1.0
  Zn  Zn10  1  0.422  0.778  0.420  1.0
  Zn  Zn11  1  0.922  0.722  0.580  1.0
  Si  Si12  1  0.092  0.051  0.683  1.0
  Si  Si13  1  0.592  0.449  0.317  1.0
  Si  Si14  1  0.908  0.949  0.317  1.0
  Si  Si15  1  0.408  0.551  0.683  1.0
  O  O16  1  0.093  0.145  0.802  1.0
  O  O17  1  0.593  0.355  0.198  1.0
  O  O18  1  0.907  0.855  0.198  1.0
  O  O19  1  0.407  0.645  0.802  1.0
  O  O20  1  0.388  0.017  0.645  1.0
  O  O21  1  0.888  0.483  0.355  1.0
  O  O22  1  0.612  0.983  0.355  1.0
  O  O23  1  0.112  0.517  0.645  1.0
  O  O24  1  0.569  0.374  0.703  1.0
  O  O25  1  0.069  0.126  0.297  1.0
  O  O26  1  0.431  0.626  0.297  1.0
  O  O27  1  0.931  0.874  0.703  1.0
  O  O28  1  0.953  0.182  0.577  1.0
  O  O29  1  0.453  0.318  0.423  1.0
  O  O30  1  0.047  0.818  0.423  1.0
  O  O31  1  0.547  0.682  0.577  1.0
  O  O32  1  0.563  0.998  0.900  1.0
  O  O33  1  0.063  0.502  0.100  1.0
  O  O34  1  0.437  0.002  0.100  1.0
  O  O35  1  0.937  0.498  0.900  1.0
  O  O36  1  0.437  0.359  0.970  1.0
  O  O37  1  0.937  0.141  0.030  1.0
  O  O38  1  0.563  0.641  0.030  1.0
  O  O39  1  0.063  0.859  0.970  1.0
[/CIF]
.
The structure described by MnZn2SiO6 crystallizes in the monoclinic P2_1/c space group. Mn(1) is bonded to one O(1), two equivalent O(5), and three equivalent O(6) atoms to form distorted MnO6 octahedra that share corners with four equivalent Mn(1)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with three equivalent Zn(1)O4 tetrahedra, and edges with two equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-53°. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form ZnO4 tetrahedra that share corners with three equivalent Mn(1)O6 octahedra, corners with two equivalent Zn(2)O4 tetrahedra, and corners with three equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 57-60°. In the second Zn site, Zn(2) is bonded to one O(2), one O(3), and two equivalent O(4) atoms to form ZnO4 tetrahedra that share corners with two equivalent Zn(1)O4 tetrahedra, corners with two equivalent Zn(2)O4 tetrahedra, and corners with four equivalent Si(1)O4 tetrahedra. Si(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SiO4 tetrahedra that share  a cornercorner with one Mn(1)O6 octahedra, corners with three equivalent Zn(1)O4 tetrahedra, and corners with four equivalent Zn(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 51°. There are six inequivalent O sites. In the first O site, O(5) is bonded in a trigonal planar geometry to two equivalent Mn(1) and one Zn(1) atom. In the second O site, O(6) is bonded in a 3-coordinate geometry to three equivalent Mn(1) atoms. In the third O site, O(1) is bonded in a trigonal planar geometry to one Mn(1), one Zn(1), and one Si(1) atom. In the fourth O site, O(2) is bonded in a trigonal non-coplanar geometry to one Zn(1), one Zn(2), and one Si(1) atom. In the fifth O site, O(3) is bonded in a trigonal planar geometry to one Zn(1), one Zn(2), and one Si(1) atom. In the sixth O site, O(4) is bonded in a trigonal planar geometry to two equivalent Zn(2) and one Si(1) atom. is represented by the CIF card [CIF]
data_MnZn2SiO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.220
_cell_length_b   8.001
_cell_length_c   11.528
_cell_angle_alpha   81.335
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   475.966
_cell_formula_units_Z   4
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
  Mn  Mn0  1  0.243  0.064  0.960  1.0
  Mn  Mn1  1  0.743  0.436  0.040  1.0
  Mn  Mn2  1  0.757  0.936  0.040  1.0
  Mn  Mn3  1  0.257  0.564  0.960  1.0
  Zn  Zn4  1  0.913  0.366  0.772  1.0
  Zn  Zn5  1  0.413  0.134  0.228  1.0
  Zn  Zn6  1  0.087  0.634  0.228  1.0
  Zn  Zn7  1  0.587  0.866  0.772  1.0
  Zn  Zn8  1  0.578  0.222  0.580  1.0
  Zn  Zn9  1  0.078  0.278  0.420  1.0
  Zn  Zn10  1  0.422  0.778  0.420  1.0
  Zn  Zn11  1  0.922  0.722  0.580  1.0
  Si  Si12  1  0.092  0.051  0.683  1.0
  Si  Si13  1  0.592  0.449  0.317  1.0
  Si  Si14  1  0.908  0.949  0.317  1.0
  Si  Si15  1  0.408  0.551  0.683  1.0
  O  O16  1  0.093  0.145  0.802  1.0
  O  O17  1  0.593  0.355  0.198  1.0
  O  O18  1  0.907  0.855  0.198  1.0
  O  O19  1  0.407  0.645  0.802  1.0
  O  O20  1  0.388  0.017  0.645  1.0
  O  O21  1  0.888  0.483  0.355  1.0
  O  O22  1  0.612  0.983  0.355  1.0
  O  O23  1  0.112  0.517  0.645  1.0
  O  O24  1  0.569  0.374  0.703  1.0
  O  O25  1  0.069  0.126  0.297  1.0
  O  O26  1  0.431  0.626  0.297  1.0
  O  O27  1  0.931  0.874  0.703  1.0
  O  O28  1  0.953  0.182  0.577  1.0
  O  O29  1  0.453  0.318  0.423  1.0
  O  O30  1  0.047  0.818  0.423  1.0
  O  O31  1  0.547  0.682  0.577  1.0
  O  O32  1  0.563  0.998  0.900  1.0
  O  O33  1  0.063  0.502  0.100  1.0
  O  O34  1  0.437  0.002  0.100  1.0
  O  O35  1  0.937  0.498  0.900  1.0
  O  O36  1  0.437  0.359  0.970  1.0
  O  O37  1  0.937  0.141  0.030  1.0
  O  O38  1  0.563  0.641  0.030  1.0
  O  O39  1  0.063  0.859  0.970  1.0
[/CIF]
.