The crystal structure described by MnZn(SiO3)2 is Esseneite structured and crystallizes in the monoclinic C2/c space group. Mn(1) is bonded to two equivalent O(2) and four equivalent O(3) atoms to form MnO6 octahedra that share corners with six equivalent Si(1)O4 tetrahedra and edges with two equivalent Mn(1)O6 octahedra. Zn(1) is bonded in a rectangular see-saw-like geometry to two equivalent O(2) and two equivalent O(3) atoms. Si(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form SiO4 tetrahedra that share corners with three equivalent Mn(1)O6 octahedra and corners with two equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 41-62°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to two equivalent Si(1) atoms. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Mn(1), one Zn(1), and one Si(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Mn(1), one Zn(1), and one Si(1) atom. is represented by the CIF file [CIF]
data_MnZn(SiO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.409
_cell_length_b   6.905
_cell_length_c   6.905
_cell_angle_alpha   87.343
_cell_angle_beta   74.962
_cell_angle_gamma   74.962
_symmetry_Int_Tables_number   1
_cell_volume   240.502
_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
  Mn  Mn0  1  0.750  0.894  0.106  1.0
  Mn  Mn1  1  0.250  0.106  0.894  1.0
  Zn  Zn2  1  0.750  0.237  0.763  1.0
  Zn  Zn3  1  0.250  0.763  0.237  1.0
  Si  Si4  1  0.219  0.220  0.386  1.0
  Si  Si5  1  0.281  0.614  0.780  1.0
  Si  Si6  1  0.719  0.386  0.220  1.0
  Si  Si7  1  0.781  0.780  0.614  1.0
  O  O8  1  0.461  0.328  0.377  1.0
  O  O9  1  0.039  0.623  0.672  1.0
  O  O10  1  0.539  0.672  0.623  1.0
  O  O11  1  0.961  0.377  0.328  1.0
  O  O12  1  0.117  0.151  0.615  1.0
  O  O13  1  0.383  0.385  0.849  1.0
  O  O14  1  0.883  0.849  0.385  1.0
  O  O15  1  0.617  0.615  0.151  1.0
  O  O16  1  0.838  0.213  0.039  1.0
  O  O17  1  0.662  0.961  0.787  1.0
  O  O18  1  0.338  0.039  0.213  1.0
  O  O19  1  0.162  0.787  0.961  1.0
[/CIF]
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The crystal structure described by MnZn(SiO3)2 is Esseneite structured and crystallizes in the monoclinic C2/c space group. Mn(1) is bonded to two equivalent O(2) and four equivalent O(3) atoms to form MnO6 octahedra that share corners with six equivalent Si(1)O4 tetrahedra and edges with two equivalent Mn(1)O6 octahedra. Zn(1) is bonded in a rectangular see-saw-like geometry to two equivalent O(2) and two equivalent O(3) atoms. Si(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form SiO4 tetrahedra that share corners with three equivalent Mn(1)O6 octahedra and corners with two equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 41-62°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to two equivalent Si(1) atoms. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Mn(1), one Zn(1), and one Si(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Mn(1), one Zn(1), and one Si(1) atom. is represented by the CIF file [CIF]
data_MnZn(SiO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.409
_cell_length_b   6.905
_cell_length_c   6.905
_cell_angle_alpha   87.343
_cell_angle_beta   74.962
_cell_angle_gamma   74.962
_symmetry_Int_Tables_number   1
_cell_volume   240.502
_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
  Mn  Mn0  1  0.750  0.894  0.106  1.0
  Mn  Mn1  1  0.250  0.106  0.894  1.0
  Zn  Zn2  1  0.750  0.237  0.763  1.0
  Zn  Zn3  1  0.250  0.763  0.237  1.0
  Si  Si4  1  0.219  0.220  0.386  1.0
  Si  Si5  1  0.281  0.614  0.780  1.0
  Si  Si6  1  0.719  0.386  0.220  1.0
  Si  Si7  1  0.781  0.780  0.614  1.0
  O  O8  1  0.461  0.328  0.377  1.0
  O  O9  1  0.039  0.623  0.672  1.0
  O  O10  1  0.539  0.672  0.623  1.0
  O  O11  1  0.961  0.377  0.328  1.0
  O  O12  1  0.117  0.151  0.615  1.0
  O  O13  1  0.383  0.385  0.849  1.0
  O  O14  1  0.883  0.849  0.385  1.0
  O  O15  1  0.617  0.615  0.151  1.0
  O  O16  1  0.838  0.213  0.039  1.0
  O  O17  1  0.662  0.961  0.787  1.0
  O  O18  1  0.338  0.039  0.213  1.0
  O  O19  1  0.162  0.787  0.961  1.0
[/CIF]
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