The material described by Ca3Mn2(WO6)2 crystallizes in the triclinic P1 space group. There are three inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(2), one O(4), one O(5), one O(7), one O(8), and one O(9) atom. In the second Ca site, Ca(2) is bonded in a 8-coordinate geometry to one O(11), one O(12), one O(2), one O(3), one O(4), one O(5), one O(6), and one O(7) atom. In the third Ca site, Ca(3) is bonded in a 8-coordinate geometry to one O(1), one O(11), one O(12), one O(3), one O(4), one O(5), one O(6), and one O(8) atom. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(12), one O(2), one O(4), one O(6), one O(8), and one O(9) atom to form WO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra and corners with four equivalent Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 22-33°. In the second W site, W(2) is bonded to one O(1), one O(10), one O(11), one O(3), one O(5), and one O(7) atom to form WO6 octahedra that share corners with two equivalent Mn(2)O6 octahedra and corners with four equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 22-32°. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(12), one O(3), one O(5), one O(7), and one O(9) atom to form MnO6 octahedra that share corners with two equivalent W(1)O6 octahedra and corners with four equivalent W(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 22-32°. In the second Mn site, Mn(2) is bonded to one O(10), one O(11), one O(2), one O(4), one O(6), and one O(8) atom to form MnO6 octahedra that share corners with two equivalent W(2)O6 octahedra and corners with four equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 22-33°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(3), one W(2), and one Mn(1) atom. In the second O site, O(2) is bonded to one Ca(1), one Ca(2), one W(1), and one Mn(2) atom to form distorted OCa2MnW trigonal pyramids that share corners with two equivalent O(5)Ca3MnW trigonal bipyramids, corners with two equivalent O(7)Ca2MnW trigonal pyramids, and  an edgeedge with one O(12)Ca2MnW tetrahedra. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Ca(2), one Ca(3), one W(2), and one Mn(1) atom. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Ca(1), one Ca(2), one Ca(3), one W(1), and one Mn(2) atom. In the fifth O site, O(5) is bonded to one Ca(1), one Ca(2), one Ca(3), one W(2), and one Mn(1) atom to form a mixture of distorted edge and corner-sharing OCa3MnW trigonal bipyramids. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Ca(2), one Ca(3), one W(1), and one Mn(2) atom. In the seventh O site, O(7) is bonded to one Ca(1), one Ca(2), one W(2), and one Mn(1) atom to form distorted OCa2MnW trigonal pyramids that share corners with two equivalent O(5)Ca3MnW trigonal bipyramids, corners with two equivalent O(2)Ca2MnW trigonal pyramids,  an edgeedge with one O(12)Ca2MnW tetrahedra, and  an edgeedge with one O(5)Ca3MnW trigonal bipyramid. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(3), one W(1), and one Mn(2) atom. In the ninth O site, O(9) is bonded in a T-shaped geometry to one Ca(1), one W(1), and one Mn(1) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Ca(1), one W(2), and one Mn(2) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Ca(2), one Ca(3), one W(2), and one Mn(2) atom. In the twelfth O site, O(12) is bonded to one Ca(2), one Ca(3), one W(1), and one Mn(1) atom to form distorted OCa2MnW tetrahedra that share corners with three equivalent O(5)Ca3MnW trigonal bipyramids,  an edgeedge with one O(2)Ca2MnW trigonal pyramid, and  an edgeedge with one O(7)Ca2MnW trigonal pyramid. is represented by the CIF file [CIF]
data_Ca3Mn2(WO6)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.519
_cell_length_b   5.644
_cell_length_c   7.610
_cell_angle_alpha   90.541
_cell_angle_beta   89.812
_cell_angle_gamma   94.304
_symmetry_Int_Tables_number   1
_cell_volume   236.366
_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
  Ca  Ca0  1  0.000  0.051  0.255  1.0
  Ca  Ca1  1  0.002  0.953  0.751  1.0
  Ca  Ca2  1  0.480  0.448  0.750  1.0
  Mn  Mn3  1  0.993  0.501  0.501  1.0
  Mn  Mn4  1  0.503  0.989  0.000  1.0
  W  W5  1  0.995  0.502  0.010  1.0
  W  W6  1  0.501  0.990  0.492  1.0
  O  O7  1  0.716  0.276  0.461  1.0
  O  O8  1  0.831  0.789  0.035  1.0
  O  O9  1  0.286  0.712  0.554  1.0
  O  O10  1  0.190  0.236  0.950  1.0
  O  O11  1  0.229  0.186  0.542  1.0
  O  O12  1  0.288  0.712  0.943  1.0
  O  O13  1  0.784  0.816  0.468  1.0
  O  O14  1  0.716  0.282  0.038  1.0
  O  O15  1  0.073  0.484  0.251  1.0
  O  O16  1  0.413  0.972  0.249  1.0
  O  O17  1  0.581  0.024  0.752  1.0
  O  O18  1  0.905  0.522  0.749  1.0
[/CIF]
.
The material described by Ca3Mn2(WO6)2 crystallizes in the triclinic P1 space group. There are three inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(2), one O(4), one O(5), one O(7), one O(8), and one O(9) atom. In the second Ca site, Ca(2) is bonded in a 8-coordinate geometry to one O(11), one O(12), one O(2), one O(3), one O(4), one O(5), one O(6), and one O(7) atom. In the third Ca site, Ca(3) is bonded in a 8-coordinate geometry to one O(1), one O(11), one O(12), one O(3), one O(4), one O(5), one O(6), and one O(8) atom. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(12), one O(2), one O(4), one O(6), one O(8), and one O(9) atom to form WO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra and corners with four equivalent Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 22-33°. In the second W site, W(2) is bonded to one O(1), one O(10), one O(11), one O(3), one O(5), and one O(7) atom to form WO6 octahedra that share corners with two equivalent Mn(2)O6 octahedra and corners with four equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 22-32°. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(12), one O(3), one O(5), one O(7), and one O(9) atom to form MnO6 octahedra that share corners with two equivalent W(1)O6 octahedra and corners with four equivalent W(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 22-32°. In the second Mn site, Mn(2) is bonded to one O(10), one O(11), one O(2), one O(4), one O(6), and one O(8) atom to form MnO6 octahedra that share corners with two equivalent W(2)O6 octahedra and corners with four equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 22-33°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(3), one W(2), and one Mn(1) atom. In the second O site, O(2) is bonded to one Ca(1), one Ca(2), one W(1), and one Mn(2) atom to form distorted OCa2MnW trigonal pyramids that share corners with two equivalent O(5)Ca3MnW trigonal bipyramids, corners with two equivalent O(7)Ca2MnW trigonal pyramids, and  an edgeedge with one O(12)Ca2MnW tetrahedra. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Ca(2), one Ca(3), one W(2), and one Mn(1) atom. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Ca(1), one Ca(2), one Ca(3), one W(1), and one Mn(2) atom. In the fifth O site, O(5) is bonded to one Ca(1), one Ca(2), one Ca(3), one W(2), and one Mn(1) atom to form a mixture of distorted edge and corner-sharing OCa3MnW trigonal bipyramids. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Ca(2), one Ca(3), one W(1), and one Mn(2) atom. In the seventh O site, O(7) is bonded to one Ca(1), one Ca(2), one W(2), and one Mn(1) atom to form distorted OCa2MnW trigonal pyramids that share corners with two equivalent O(5)Ca3MnW trigonal bipyramids, corners with two equivalent O(2)Ca2MnW trigonal pyramids,  an edgeedge with one O(12)Ca2MnW tetrahedra, and  an edgeedge with one O(5)Ca3MnW trigonal bipyramid. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(3), one W(1), and one Mn(2) atom. In the ninth O site, O(9) is bonded in a T-shaped geometry to one Ca(1), one W(1), and one Mn(1) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Ca(1), one W(2), and one Mn(2) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Ca(2), one Ca(3), one W(2), and one Mn(2) atom. In the twelfth O site, O(12) is bonded to one Ca(2), one Ca(3), one W(1), and one Mn(1) atom to form distorted OCa2MnW tetrahedra that share corners with three equivalent O(5)Ca3MnW trigonal bipyramids,  an edgeedge with one O(2)Ca2MnW trigonal pyramid, and  an edgeedge with one O(7)Ca2MnW trigonal pyramid. is represented by the CIF file [CIF]
data_Ca3Mn2(WO6)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.519
_cell_length_b   5.644
_cell_length_c   7.610
_cell_angle_alpha   90.541
_cell_angle_beta   89.812
_cell_angle_gamma   94.304
_symmetry_Int_Tables_number   1
_cell_volume   236.366
_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
  Ca  Ca0  1  0.000  0.051  0.255  1.0
  Ca  Ca1  1  0.002  0.953  0.751  1.0
  Ca  Ca2  1  0.480  0.448  0.750  1.0
  Mn  Mn3  1  0.993  0.501  0.501  1.0
  Mn  Mn4  1  0.503  0.989  0.000  1.0
  W  W5  1  0.995  0.502  0.010  1.0
  W  W6  1  0.501  0.990  0.492  1.0
  O  O7  1  0.716  0.276  0.461  1.0
  O  O8  1  0.831  0.789  0.035  1.0
  O  O9  1  0.286  0.712  0.554  1.0
  O  O10  1  0.190  0.236  0.950  1.0
  O  O11  1  0.229  0.186  0.542  1.0
  O  O12  1  0.288  0.712  0.943  1.0
  O  O13  1  0.784  0.816  0.468  1.0
  O  O14  1  0.716  0.282  0.038  1.0
  O  O15  1  0.073  0.484  0.251  1.0
  O  O16  1  0.413  0.972  0.249  1.0
  O  O17  1  0.581  0.024  0.752  1.0
  O  O18  1  0.905  0.522  0.749  1.0
[/CIF]
.