The crystal structure described by MnSiO3 crystallizes in the triclinic P-1 space group. There are five inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(10), one O(12), one O(2), and two equivalent O(6) atoms to form MnO6 octahedra that share  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Si(5)O4 tetrahedra, corners with three equivalent Si(4)O4 tetrahedra,  an edgeedge with one Mn(1)O6 octahedra,  an edgeedge with one Mn(3)O6 octahedra, and edges with two equivalent Mn(5)O6 octahedra. In the second Mn site, Mn(2) is bonded in a 4-coordinate geometry to one O(12), one O(2), one O(5), and one O(8) atom. In the third Mn site, Mn(3) is bonded to one O(1), one O(12), one O(5), one O(7), and two equivalent O(4) atoms to form MnO6 octahedra that share  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Mn(1)O6 octahedra,  an edgeedge with one Mn(3)O6 octahedra, and  an edgeedge with one Mn(5)O6 octahedra. In the fourth Mn site, Mn(4) is bonded in a 5-coordinate geometry to one O(14), one O(15), one O(4), one O(7), and one O(8) atom. In the fifth Mn site, Mn(5) is bonded to one O(1), one O(10), one O(15), one O(3), one O(6), and one O(7) atom to form distorted MnO6 octahedra that share  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra,  an edgeedge with one Mn(3)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, and  an edgeedge with one Si(1)O4 tetrahedra. There are five inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(14), one O(3), one O(5), and one O(7) atom to form SiO4 tetrahedra that share corners with two equivalent Mn(3)O6 octahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, and  an edgeedge with one Mn(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 11-63°. In the second Si site, Si(2) is bonded to one O(14), one O(15), one O(4), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Mn(5)O6 octahedra, corners with two equivalent Mn(3)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra, and  a cornercorner with one Si(5)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-67°. In the third Si site, Si(3) is bonded to one O(1), one O(13), one O(3), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Mn(1)O6 octahedra,  a cornercorner with one Mn(3)O6 octahedra, corners with two equivalent Mn(5)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra, and  a cornercorner with one Si(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-70°. In the fourth Si site, Si(4) is bonded to one O(11), one O(13), one O(2), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Mn(5)O6 octahedra, corners with three equivalent Mn(1)O6 octahedra,  a cornercorner with one Si(3)O4 tetrahedra, and  a cornercorner with one Si(5)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 45-67°. In the fifth Si site, Si(5) is bonded to one O(10), one O(11), one O(12), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Mn(3)O6 octahedra,  a cornercorner with one Mn(5)O6 octahedra, corners with two equivalent Mn(1)O6 octahedra,  a cornercorner with one Si(2)O4 tetrahedra, and  a cornercorner with one Si(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 47-63°. There are fifteen inequivalent O sites. In the first O site, O(1) is bonded to one Mn(1), one Mn(3), one Mn(5), and one Si(3) atom to form a mixture of distorted corner and edge-sharing OMn3Si tetrahedra. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Mn(1), one Mn(2), and one Si(4) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Mn(5), one Si(1), and one Si(3) atom. In the fourth O site, O(4) is bonded to one Mn(4), two equivalent Mn(3), and one Si(2) atom to form a mixture of distorted corner and edge-sharing OMn3Si tetrahedra. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Mn(2), one Mn(3), and one Si(1) atom. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Mn(5), two equivalent Mn(1), and one Si(4) atom. In the seventh O site, O(7) is bonded in a distorted rectangular see-saw-like geometry to one Mn(3), one Mn(4), one Mn(5), and one Si(1) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Mn(2), one Mn(4), and one Si(3) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Si(2) and one Si(5) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(5), and one Si(5) atom. In the eleventh O site, O(11) is bonded in a bent 150 degrees geometry to one Si(4) and one Si(5) atom. In the twelfth O site, O(12) is bonded to one Mn(1), one Mn(2), one Mn(3), and one Si(5) atom to form a mixture of distorted corner and edge-sharing OMn3Si trigonal pyramids. In the thirteenth O site, O(13) is bonded in a bent 150 degrees geometry to one Si(3) and one Si(4) atom. In the fourteenth O site, O(14) is bonded in a 3-coordinate geometry to one Mn(4), one Si(1), and one Si(2) atom. In the fifteenth O site, O(15) is bonded in a distorted trigonal planar geometry to one Mn(4), one Mn(5), and one Si(2) atom. is represented by the CIF card [CIF]
data_MnSiO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.692
_cell_length_b   7.611
_cell_length_c   11.853
_cell_angle_alpha   105.504
_cell_angle_beta   92.441
_cell_angle_gamma   94.381
_symmetry_Int_Tables_number   1
_cell_volume   578.732
_cell_formula_units_Z   10
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  0.128  0.317  0.445  1.0
  Mn  Mn1  1  0.655  0.034  0.706  1.0
  Mn  Mn2  1  0.028  0.122  0.147  1.0
  Mn  Mn3  1  0.345  0.966  0.294  1.0
  Mn  Mn4  1  0.204  0.701  0.028  1.0
  Mn  Mn5  1  0.796  0.299  0.972  1.0
  Mn  Mn6  1  0.815  0.490  0.270  1.0
  Mn  Mn7  1  0.185  0.510  0.730  1.0
  Mn  Mn8  1  0.972  0.878  0.853  1.0
  Mn  Mn9  1  0.872  0.683  0.555  1.0
  Si  Si10  1  0.496  0.222  0.123  1.0
  Si  Si11  1  0.245  0.256  0.910  1.0
  Si  Si12  1  0.701  0.452  0.734  1.0
  Si  Si13  1  0.299  0.548  0.266  1.0
  Si  Si14  1  0.755  0.744  0.090  1.0
  Si  Si15  1  0.363  0.740  0.534  1.0
  Si  Si16  1  0.151  0.077  0.654  1.0
  Si  Si17  1  0.637  0.260  0.466  1.0
  Si  Si18  1  0.504  0.778  0.877  1.0
  Si  Si19  1  0.849  0.923  0.346  1.0
  O  O20  1  0.891  0.596  0.731  1.0
  O  O21  1  0.418  0.231  0.399  1.0
  O  O22  1  0.484  0.425  0.217  1.0
  O  O23  1  0.943  0.844  0.040  1.0
  O  O24  1  0.338  0.067  0.144  1.0
  O  O25  1  0.195  0.599  0.566  1.0
  O  O26  1  0.266  0.801  0.870  1.0
  O  O27  1  0.261  0.697  0.195  1.0
  O  O28  1  0.703  0.859  0.223  1.0
  O  O29  1  0.662  0.933  0.856  1.0
  O  O30  1  0.297  0.141  0.777  1.0
  O  O31  1  0.109  0.404  0.269  1.0
  O  O32  1  0.895  0.747  0.390  1.0
  O  O33  1  0.284  0.946  0.560  1.0
  O  O34  1  0.716  0.054  0.440  1.0
  O  O35  1  0.057  0.156  0.960  1.0
  O  O36  1  0.105  0.253  0.610  1.0
  O  O37  1  0.957  0.955  0.680  1.0
  O  O38  1  0.390  0.676  0.394  1.0
  O  O39  1  0.448  0.258  0.993  1.0
  O  O40  1  0.610  0.324  0.606  1.0
  O  O41  1  0.187  0.454  0.904  1.0
  O  O42  1  0.734  0.199  0.130  1.0
  O  O43  1  0.739  0.303  0.805  1.0
  O  O44  1  0.552  0.742  0.007  1.0
  O  O45  1  0.813  0.546  0.096  1.0
  O  O46  1  0.043  0.045  0.320  1.0
  O  O47  1  0.516  0.575  0.783  1.0
  O  O48  1  0.805  0.401  0.434  1.0
  O  O49  1  0.582  0.769  0.601  1.0
[/CIF]
.
The crystal structure described by MnSiO3 crystallizes in the triclinic P-1 space group. There are five inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(10), one O(12), one O(2), and two equivalent O(6) atoms to form MnO6 octahedra that share  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Si(5)O4 tetrahedra, corners with three equivalent Si(4)O4 tetrahedra,  an edgeedge with one Mn(1)O6 octahedra,  an edgeedge with one Mn(3)O6 octahedra, and edges with two equivalent Mn(5)O6 octahedra. In the second Mn site, Mn(2) is bonded in a 4-coordinate geometry to one O(12), one O(2), one O(5), and one O(8) atom. In the third Mn site, Mn(3) is bonded to one O(1), one O(12), one O(5), one O(7), and two equivalent O(4) atoms to form MnO6 octahedra that share  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Mn(1)O6 octahedra,  an edgeedge with one Mn(3)O6 octahedra, and  an edgeedge with one Mn(5)O6 octahedra. In the fourth Mn site, Mn(4) is bonded in a 5-coordinate geometry to one O(14), one O(15), one O(4), one O(7), and one O(8) atom. In the fifth Mn site, Mn(5) is bonded to one O(1), one O(10), one O(15), one O(3), one O(6), and one O(7) atom to form distorted MnO6 octahedra that share  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra,  an edgeedge with one Mn(3)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, and  an edgeedge with one Si(1)O4 tetrahedra. There are five inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(14), one O(3), one O(5), and one O(7) atom to form SiO4 tetrahedra that share corners with two equivalent Mn(3)O6 octahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, and  an edgeedge with one Mn(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 11-63°. In the second Si site, Si(2) is bonded to one O(14), one O(15), one O(4), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Mn(5)O6 octahedra, corners with two equivalent Mn(3)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra, and  a cornercorner with one Si(5)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-67°. In the third Si site, Si(3) is bonded to one O(1), one O(13), one O(3), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Mn(1)O6 octahedra,  a cornercorner with one Mn(3)O6 octahedra, corners with two equivalent Mn(5)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra, and  a cornercorner with one Si(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-70°. In the fourth Si site, Si(4) is bonded to one O(11), one O(13), one O(2), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Mn(5)O6 octahedra, corners with three equivalent Mn(1)O6 octahedra,  a cornercorner with one Si(3)O4 tetrahedra, and  a cornercorner with one Si(5)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 45-67°. In the fifth Si site, Si(5) is bonded to one O(10), one O(11), one O(12), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Mn(3)O6 octahedra,  a cornercorner with one Mn(5)O6 octahedra, corners with two equivalent Mn(1)O6 octahedra,  a cornercorner with one Si(2)O4 tetrahedra, and  a cornercorner with one Si(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 47-63°. There are fifteen inequivalent O sites. In the first O site, O(1) is bonded to one Mn(1), one Mn(3), one Mn(5), and one Si(3) atom to form a mixture of distorted corner and edge-sharing OMn3Si tetrahedra. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Mn(1), one Mn(2), and one Si(4) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Mn(5), one Si(1), and one Si(3) atom. In the fourth O site, O(4) is bonded to one Mn(4), two equivalent Mn(3), and one Si(2) atom to form a mixture of distorted corner and edge-sharing OMn3Si tetrahedra. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Mn(2), one Mn(3), and one Si(1) atom. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Mn(5), two equivalent Mn(1), and one Si(4) atom. In the seventh O site, O(7) is bonded in a distorted rectangular see-saw-like geometry to one Mn(3), one Mn(4), one Mn(5), and one Si(1) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Mn(2), one Mn(4), and one Si(3) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Si(2) and one Si(5) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(5), and one Si(5) atom. In the eleventh O site, O(11) is bonded in a bent 150 degrees geometry to one Si(4) and one Si(5) atom. In the twelfth O site, O(12) is bonded to one Mn(1), one Mn(2), one Mn(3), and one Si(5) atom to form a mixture of distorted corner and edge-sharing OMn3Si trigonal pyramids. In the thirteenth O site, O(13) is bonded in a bent 150 degrees geometry to one Si(3) and one Si(4) atom. In the fourteenth O site, O(14) is bonded in a 3-coordinate geometry to one Mn(4), one Si(1), and one Si(2) atom. In the fifteenth O site, O(15) is bonded in a distorted trigonal planar geometry to one Mn(4), one Mn(5), and one Si(2) atom. is represented by the CIF card [CIF]
data_MnSiO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.692
_cell_length_b   7.611
_cell_length_c   11.853
_cell_angle_alpha   105.504
_cell_angle_beta   92.441
_cell_angle_gamma   94.381
_symmetry_Int_Tables_number   1
_cell_volume   578.732
_cell_formula_units_Z   10
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  0.128  0.317  0.445  1.0
  Mn  Mn1  1  0.655  0.034  0.706  1.0
  Mn  Mn2  1  0.028  0.122  0.147  1.0
  Mn  Mn3  1  0.345  0.966  0.294  1.0
  Mn  Mn4  1  0.204  0.701  0.028  1.0
  Mn  Mn5  1  0.796  0.299  0.972  1.0
  Mn  Mn6  1  0.815  0.490  0.270  1.0
  Mn  Mn7  1  0.185  0.510  0.730  1.0
  Mn  Mn8  1  0.972  0.878  0.853  1.0
  Mn  Mn9  1  0.872  0.683  0.555  1.0
  Si  Si10  1  0.496  0.222  0.123  1.0
  Si  Si11  1  0.245  0.256  0.910  1.0
  Si  Si12  1  0.701  0.452  0.734  1.0
  Si  Si13  1  0.299  0.548  0.266  1.0
  Si  Si14  1  0.755  0.744  0.090  1.0
  Si  Si15  1  0.363  0.740  0.534  1.0
  Si  Si16  1  0.151  0.077  0.654  1.0
  Si  Si17  1  0.637  0.260  0.466  1.0
  Si  Si18  1  0.504  0.778  0.877  1.0
  Si  Si19  1  0.849  0.923  0.346  1.0
  O  O20  1  0.891  0.596  0.731  1.0
  O  O21  1  0.418  0.231  0.399  1.0
  O  O22  1  0.484  0.425  0.217  1.0
  O  O23  1  0.943  0.844  0.040  1.0
  O  O24  1  0.338  0.067  0.144  1.0
  O  O25  1  0.195  0.599  0.566  1.0
  O  O26  1  0.266  0.801  0.870  1.0
  O  O27  1  0.261  0.697  0.195  1.0
  O  O28  1  0.703  0.859  0.223  1.0
  O  O29  1  0.662  0.933  0.856  1.0
  O  O30  1  0.297  0.141  0.777  1.0
  O  O31  1  0.109  0.404  0.269  1.0
  O  O32  1  0.895  0.747  0.390  1.0
  O  O33  1  0.284  0.946  0.560  1.0
  O  O34  1  0.716  0.054  0.440  1.0
  O  O35  1  0.057  0.156  0.960  1.0
  O  O36  1  0.105  0.253  0.610  1.0
  O  O37  1  0.957  0.955  0.680  1.0
  O  O38  1  0.390  0.676  0.394  1.0
  O  O39  1  0.448  0.258  0.993  1.0
  O  O40  1  0.610  0.324  0.606  1.0
  O  O41  1  0.187  0.454  0.904  1.0
  O  O42  1  0.734  0.199  0.130  1.0
  O  O43  1  0.739  0.303  0.805  1.0
  O  O44  1  0.552  0.742  0.007  1.0
  O  O45  1  0.813  0.546  0.096  1.0
  O  O46  1  0.043  0.045  0.320  1.0
  O  O47  1  0.516  0.575  0.783  1.0
  O  O48  1  0.805  0.401  0.434  1.0
  O  O49  1  0.582  0.769  0.601  1.0
[/CIF]
.