The crystal structure described by CaMn2(PO4)2 crystallizes in the monoclinic Cc space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 8-coordinate geometry to one O(10), one O(11), one O(13), one O(14), one O(15), one O(16), one O(2), and one O(3) atom. In the second Ca site, Ca(2) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(13), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. There are four inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(12), one O(14), one O(4), one O(6), and one O(8) atom to form distorted MnO5 trigonal bipyramids that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, and corners with two equivalent P(4)O4 tetrahedra. In the second Mn site, Mn(2) is bonded to one O(15), one O(2), one O(3), one O(7), and one O(9) atom to form distorted MnO5 trigonal bipyramids that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, and corners with two equivalent P(2)O4 tetrahedra. In the third Mn site, Mn(3) is bonded in a 6-coordinate geometry to one O(1), one O(11), one O(15), one O(3), one O(4), and one O(6) atom. In the fourth Mn site, Mn(4) is bonded in a 6-coordinate geometry to one O(12), one O(14), one O(16), one O(5), one O(7), and one O(9) atom. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(10), one O(11), one O(12), and one O(15) atom to form PO4 tetrahedra that share  a cornercorner with one Mn(1)O5 trigonal bipyramid and  a cornercorner with one Mn(2)O5 trigonal bipyramid. In the second P site, P(2) is bonded to one O(3), one O(5), one O(7), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Mn(1)O5 trigonal bipyramid and corners with two equivalent Mn(2)O5 trigonal bipyramids. In the third P site, P(3) is bonded to one O(1), one O(13), one O(4), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Mn(1)O5 trigonal bipyramid and  a cornercorner with one Mn(2)O5 trigonal bipyramid. In the fourth P site, P(4) is bonded to one O(14), one O(16), one O(2), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one Mn(2)O5 trigonal bipyramid and corners with two equivalent Mn(1)O5 trigonal bipyramids. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Ca(2), one Mn(3), and one P(3) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Ca(1), one Mn(2), and one P(4) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Ca(1), one Mn(2), one Mn(3), and one P(2) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Ca(2), one Mn(1), one Mn(3), and one P(3) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Ca(2), one Mn(4), and one P(2) atom. In the sixth O site, O(6) is bonded in a 1-coordinate geometry to one Ca(2), one Mn(1), one Mn(3), and one P(4) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Ca(2), one Mn(2), one Mn(4), and one P(2) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Ca(2), one Mn(1), and one P(2) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Mn(2), one Mn(4), and one P(3) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Ca(1), one Ca(2), and one P(1) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal planar geometry to one Ca(1), one Mn(3), and one P(1) atom. In the twelfth O site, O(12) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(4), and one P(1) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one Ca(1), one Ca(2), and one P(3) atom. In the fourteenth O site, O(14) is bonded in a 4-coordinate geometry to one Ca(1), one Mn(1), one Mn(4), and one P(4) atom. In the fifteenth O site, O(15) is bonded in a 4-coordinate geometry to one Ca(1), one Mn(2), one Mn(3), and one P(1) atom. In the sixteenth O site, O(16) is bonded in a distorted bent 150 degrees geometry to one Ca(1), one Mn(4), and one P(4) atom. is represented by the CIF card [CIF]
data_CaMn2(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.108
_cell_length_b   9.108
_cell_length_c   17.484
_cell_angle_alpha   62.813
_cell_angle_beta   62.813
_cell_angle_gamma   32.477
_symmetry_Int_Tables_number   1
_cell_volume   685.018
_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
  Ca  Ca0  1  0.480  0.834  0.856  1.0
  Ca  Ca1  1  0.165  0.516  0.645  1.0
  Ca  Ca2  1  0.834  0.480  0.356  1.0
  Ca  Ca3  1  0.516  0.165  0.145  1.0
  Mn  Mn4  1  0.197  0.616  0.960  1.0
  Mn  Mn5  1  0.383  0.800  0.539  1.0
  Mn  Mn6  1  0.800  0.383  0.039  1.0
  Mn  Mn7  1  0.504  0.002  0.999  1.0
  Mn  Mn8  1  0.616  0.197  0.460  1.0
  Mn  Mn9  1  0.652  0.347  0.250  1.0
  Mn  Mn10  1  0.347  0.652  0.750  1.0
  Mn  Mn11  1  0.002  0.504  0.499  1.0
  P  P12  1  0.050  0.514  0.867  1.0
  P  P13  1  0.770  0.194  0.609  1.0
  P  P14  1  0.947  0.486  0.134  1.0
  P  P15  1  0.194  0.770  0.109  1.0
  P  P16  1  0.514  0.050  0.367  1.0
  P  P17  1  0.486  0.947  0.634  1.0
  P  P18  1  0.226  0.805  0.391  1.0
  P  P19  1  0.805  0.226  0.891  1.0
  O  O20  1  0.699  0.805  0.108  1.0
  O  O21  1  0.797  0.358  0.929  1.0
  O  O22  1  0.805  0.699  0.608  1.0
  O  O23  1  0.806  0.350  0.539  1.0
  O  O24  1  0.190  0.360  0.055  1.0
  O  O25  1  0.565  0.344  0.689  1.0
  O  O26  1  0.648  0.189  0.960  1.0
  O  O27  1  0.886  0.063  0.130  1.0
  O  O28  1  0.189  0.648  0.460  1.0
  O  O29  1  0.641  0.196  0.573  1.0
  O  O30  1  0.869  0.376  0.145  1.0
  O  O31  1  0.603  0.950  0.287  1.0
  O  O32  1  0.196  0.641  0.073  1.0
  O  O33  1  0.063  0.886  0.630  1.0
  O  O34  1  0.300  0.195  0.894  1.0
  O  O35  1  0.124  0.628  0.855  1.0
  O  O36  1  0.950  0.603  0.787  1.0
  O  O37  1  0.350  0.806  0.039  1.0
  O  O38  1  0.376  0.869  0.645  1.0
  O  O39  1  0.399  0.045  0.713  1.0
  O  O40  1  0.934  0.113  0.370  1.0
  O  O41  1  0.360  0.190  0.555  1.0
  O  O42  1  0.113  0.934  0.870  1.0
  O  O43  1  0.344  0.565  0.189  1.0
  O  O44  1  0.358  0.797  0.429  1.0
  O  O45  1  0.195  0.300  0.394  1.0
  O  O46  1  0.045  0.399  0.213  1.0
  O  O47  1  0.643  0.805  0.445  1.0
  O  O48  1  0.805  0.643  0.945  1.0
  O  O49  1  0.655  0.433  0.811  1.0
  O  O50  1  0.433  0.655  0.311  1.0
  O  O51  1  0.628  0.124  0.355  1.0
[/CIF]
.
The crystal structure described by CaMn2(PO4)2 crystallizes in the monoclinic Cc space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 8-coordinate geometry to one O(10), one O(11), one O(13), one O(14), one O(15), one O(16), one O(2), and one O(3) atom. In the second Ca site, Ca(2) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(13), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. There are four inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(12), one O(14), one O(4), one O(6), and one O(8) atom to form distorted MnO5 trigonal bipyramids that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, and corners with two equivalent P(4)O4 tetrahedra. In the second Mn site, Mn(2) is bonded to one O(15), one O(2), one O(3), one O(7), and one O(9) atom to form distorted MnO5 trigonal bipyramids that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, and corners with two equivalent P(2)O4 tetrahedra. In the third Mn site, Mn(3) is bonded in a 6-coordinate geometry to one O(1), one O(11), one O(15), one O(3), one O(4), and one O(6) atom. In the fourth Mn site, Mn(4) is bonded in a 6-coordinate geometry to one O(12), one O(14), one O(16), one O(5), one O(7), and one O(9) atom. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(10), one O(11), one O(12), and one O(15) atom to form PO4 tetrahedra that share  a cornercorner with one Mn(1)O5 trigonal bipyramid and  a cornercorner with one Mn(2)O5 trigonal bipyramid. In the second P site, P(2) is bonded to one O(3), one O(5), one O(7), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Mn(1)O5 trigonal bipyramid and corners with two equivalent Mn(2)O5 trigonal bipyramids. In the third P site, P(3) is bonded to one O(1), one O(13), one O(4), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Mn(1)O5 trigonal bipyramid and  a cornercorner with one Mn(2)O5 trigonal bipyramid. In the fourth P site, P(4) is bonded to one O(14), one O(16), one O(2), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one Mn(2)O5 trigonal bipyramid and corners with two equivalent Mn(1)O5 trigonal bipyramids. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Ca(2), one Mn(3), and one P(3) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Ca(1), one Mn(2), and one P(4) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Ca(1), one Mn(2), one Mn(3), and one P(2) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Ca(2), one Mn(1), one Mn(3), and one P(3) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Ca(2), one Mn(4), and one P(2) atom. In the sixth O site, O(6) is bonded in a 1-coordinate geometry to one Ca(2), one Mn(1), one Mn(3), and one P(4) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Ca(2), one Mn(2), one Mn(4), and one P(2) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Ca(2), one Mn(1), and one P(2) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Mn(2), one Mn(4), and one P(3) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Ca(1), one Ca(2), and one P(1) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal planar geometry to one Ca(1), one Mn(3), and one P(1) atom. In the twelfth O site, O(12) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(4), and one P(1) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one Ca(1), one Ca(2), and one P(3) atom. In the fourteenth O site, O(14) is bonded in a 4-coordinate geometry to one Ca(1), one Mn(1), one Mn(4), and one P(4) atom. In the fifteenth O site, O(15) is bonded in a 4-coordinate geometry to one Ca(1), one Mn(2), one Mn(3), and one P(1) atom. In the sixteenth O site, O(16) is bonded in a distorted bent 150 degrees geometry to one Ca(1), one Mn(4), and one P(4) atom. is represented by the CIF card [CIF]
data_CaMn2(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.108
_cell_length_b   9.108
_cell_length_c   17.484
_cell_angle_alpha   62.813
_cell_angle_beta   62.813
_cell_angle_gamma   32.477
_symmetry_Int_Tables_number   1
_cell_volume   685.018
_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
  Ca  Ca0  1  0.480  0.834  0.856  1.0
  Ca  Ca1  1  0.165  0.516  0.645  1.0
  Ca  Ca2  1  0.834  0.480  0.356  1.0
  Ca  Ca3  1  0.516  0.165  0.145  1.0
  Mn  Mn4  1  0.197  0.616  0.960  1.0
  Mn  Mn5  1  0.383  0.800  0.539  1.0
  Mn  Mn6  1  0.800  0.383  0.039  1.0
  Mn  Mn7  1  0.504  0.002  0.999  1.0
  Mn  Mn8  1  0.616  0.197  0.460  1.0
  Mn  Mn9  1  0.652  0.347  0.250  1.0
  Mn  Mn10  1  0.347  0.652  0.750  1.0
  Mn  Mn11  1  0.002  0.504  0.499  1.0
  P  P12  1  0.050  0.514  0.867  1.0
  P  P13  1  0.770  0.194  0.609  1.0
  P  P14  1  0.947  0.486  0.134  1.0
  P  P15  1  0.194  0.770  0.109  1.0
  P  P16  1  0.514  0.050  0.367  1.0
  P  P17  1  0.486  0.947  0.634  1.0
  P  P18  1  0.226  0.805  0.391  1.0
  P  P19  1  0.805  0.226  0.891  1.0
  O  O20  1  0.699  0.805  0.108  1.0
  O  O21  1  0.797  0.358  0.929  1.0
  O  O22  1  0.805  0.699  0.608  1.0
  O  O23  1  0.806  0.350  0.539  1.0
  O  O24  1  0.190  0.360  0.055  1.0
  O  O25  1  0.565  0.344  0.689  1.0
  O  O26  1  0.648  0.189  0.960  1.0
  O  O27  1  0.886  0.063  0.130  1.0
  O  O28  1  0.189  0.648  0.460  1.0
  O  O29  1  0.641  0.196  0.573  1.0
  O  O30  1  0.869  0.376  0.145  1.0
  O  O31  1  0.603  0.950  0.287  1.0
  O  O32  1  0.196  0.641  0.073  1.0
  O  O33  1  0.063  0.886  0.630  1.0
  O  O34  1  0.300  0.195  0.894  1.0
  O  O35  1  0.124  0.628  0.855  1.0
  O  O36  1  0.950  0.603  0.787  1.0
  O  O37  1  0.350  0.806  0.039  1.0
  O  O38  1  0.376  0.869  0.645  1.0
  O  O39  1  0.399  0.045  0.713  1.0
  O  O40  1  0.934  0.113  0.370  1.0
  O  O41  1  0.360  0.190  0.555  1.0
  O  O42  1  0.113  0.934  0.870  1.0
  O  O43  1  0.344  0.565  0.189  1.0
  O  O44  1  0.358  0.797  0.429  1.0
  O  O45  1  0.195  0.300  0.394  1.0
  O  O46  1  0.045  0.399  0.213  1.0
  O  O47  1  0.643  0.805  0.445  1.0
  O  O48  1  0.805  0.643  0.945  1.0
  O  O49  1  0.655  0.433  0.811  1.0
  O  O50  1  0.433  0.655  0.311  1.0
  O  O51  1  0.628  0.124  0.355  1.0
[/CIF]
.