The structure described by MgMn6(PO4)6 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(16), one O(21), one O(4), and one O(5) atom to form MgO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, and  a cornercorner with one P(5)O4 tetrahedra. There are six inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(10), one O(15), one O(24), and one O(3) atom to form distorted MnO4 trigonal pyramids that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra, and  a cornercorner with one P(6)O4 tetrahedra. In the second Mn site, Mn(2) is bonded to one O(1), one O(12), one O(14), and one O(8) atom to form distorted MnO4 trigonal pyramids 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  a cornercorner with one P(6)O4 tetrahedra. In the third Mn site, Mn(3) is bonded in a distorted see-saw-like geometry to one O(11), one O(16), one O(7), and one O(9) atom. In the fourth Mn site, Mn(4) is bonded in a 5-coordinate geometry to one O(13), one O(21), one O(4), one O(6), and one O(7) atom. In the fifth Mn site, Mn(5) is bonded in a rectangular see-saw-like geometry to one O(20), one O(22), one O(23), and one O(5) atom. In the sixth Mn site, Mn(6) is bonded in a distorted see-saw-like geometry to one O(17), one O(18), one O(19), and one O(2) atom. There are six inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(17), one O(21), and one O(23) atom to form PO4 tetrahedra that share  a cornercorner with one Mg(1)O4 tetrahedra and  a cornercorner with one Mn(2)O4 trigonal pyramid. In the second P site, P(2) is bonded to one O(19), one O(24), one O(5), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Mg(1)O4 tetrahedra and  a cornercorner with one Mn(1)O4 trigonal pyramid. In the third P site, P(3) is bonded to one O(11), one O(12), one O(15), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one Mn(1)O4 trigonal pyramid and  a cornercorner with one Mn(2)O4 trigonal pyramid. In the fourth P site, P(4) is bonded to one O(18), one O(22), one O(4), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Mg(1)O4 tetrahedra and  a cornercorner with one Mn(2)O4 trigonal pyramid. In the fifth P site, P(5) is bonded to one O(16), one O(2), one O(20), and one O(3) atom to form PO4 tetrahedra that share  a cornercorner with one Mg(1)O4 tetrahedra and  a cornercorner with one Mn(1)O4 trigonal pyramid. In the sixth P site, P(6) is bonded to one O(10), one O(13), one O(14), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Mn(1)O4 trigonal pyramid and  a cornercorner with one Mn(2)O4 trigonal pyramid. There are twenty-four inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Mn(2) and one P(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Mn(6) and one P(5) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Mn(1) and one P(5) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Mn(4), and one P(4) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Mg(1), one Mn(5), and one P(2) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one Mn(4) and one P(3) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Mn(3), one Mn(4), and one P(6) atom. In the eighth O site, O(8) is bonded in a bent 150 degrees geometry to one Mn(2) and one P(4) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Mn(3) and one P(2) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Mn(1) and one P(6) atom. In the eleventh O site, O(11) is bonded in a bent 150 degrees geometry to one Mn(3) and one P(3) atom. In the twelfth O site, O(12) is bonded in a bent 150 degrees geometry to one Mn(2) and one P(3) atom. In the thirteenth O site, O(13) is bonded in an L-shaped geometry to one Mn(4) and one P(6) atom. In the fourteenth O site, O(14) is bonded in a bent 150 degrees geometry to one Mn(2) and one P(6) atom. In the fifteenth O site, O(15) is bonded in a bent 150 degrees geometry to one Mn(1) and one P(3) atom. In the sixteenth O site, O(16) is bonded in a trigonal planar geometry to one Mg(1), one Mn(3), and one P(5) atom. In the seventeenth O site, O(17) is bonded in a bent 120 degrees geometry to one Mn(6) and one P(1) atom. In the eighteenth O site, O(18) is bonded in a bent 150 degrees geometry to one Mn(6) and one P(4) atom. In the nineteenth O site, O(19) is bonded in a bent 150 degrees geometry to one Mn(6) and one P(2) atom. In the twentieth O site, O(20) is bonded in a bent 120 degrees geometry to one Mn(5) and one P(5) atom. In the twenty-first O site, O(21) is bonded in a distorted T-shaped geometry to one Mg(1), one Mn(4), and one P(1) atom. In the twenty-second O site, O(22) is bonded in a distorted bent 150 degrees geometry to one Mn(5) and one P(4) atom. In the twenty-third O site, O(23) is bonded in a distorted bent 120 degrees geometry to one Mn(5) and one P(1) atom. In the twenty-fourth O site, O(24) is bonded in a bent 150 degrees geometry to one Mn(1) and one P(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgMn6(PO4)6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.538
_cell_length_b   9.245
_cell_length_c   8.654
_cell_angle_alpha   108.633
_cell_angle_beta   107.418
_cell_angle_gamma   107.881
_symmetry_Int_Tables_number   1
_cell_volume   552.947
_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
  Mg  Mg0  1  0.508  0.605  0.101  1.0
  Mn  Mn1  1  0.042  0.449  0.273  1.0
  Mn  Mn2  1  0.279  0.064  0.443  1.0
  Mn  Mn3  1  0.789  0.929  0.566  1.0
  Mn  Mn4  1  0.537  0.803  0.873  1.0
  Mn  Mn5  1  0.447  0.229  0.046  1.0
  Mn  Mn6  1  0.923  0.534  0.760  1.0
  P  P7  1  0.554  0.396  0.791  1.0
  P  P8  1  0.092  0.297  0.907  1.0
  P  P9  1  0.892  0.081  0.268  1.0
  P  P10  1  0.307  0.867  0.068  1.0
  P  P11  1  0.772  0.566  0.409  1.0
  P  P12  1  0.365  0.781  0.551  1.0
  O  O13  1  0.352  0.276  0.642  1.0
  O  O14  1  0.854  0.649  0.621  1.0
  O  O15  1  0.935  0.590  0.357  1.0
  O  O16  1  0.427  0.768  0.045  1.0
  O  O17  1  0.305  0.382  0.016  1.0
  O  O18  1  0.761  0.986  0.061  1.0
  O  O19  1  0.579  0.847  0.657  1.0
  O  O20  1  0.364  0.967  0.272  1.0
  O  O21  1  0.027  0.110  0.781  1.0
  O  O22  1  0.280  0.645  0.352  1.0
  O  O23  1  0.804  0.018  0.377  1.0
  O  O24  1  0.064  0.051  0.280  1.0
  O  O25  1  0.300  0.695  0.665  1.0
  O  O26  1  0.326  0.937  0.574  1.0
  O  O27  1  0.943  0.275  0.336  1.0
  O  O28  1  0.690  0.682  0.352  1.0
  O  O29  1  0.676  0.385  0.691  1.0
  O  O30  1  0.104  0.737  0.976  1.0
  O  O31  1  0.037  0.393  0.800  1.0
  O  O32  1  0.626  0.383  0.317  1.0
  O  O33  1  0.571  0.580  0.883  1.0
  O  O34  1  0.350  0.982  0.979  1.0
  O  O35  1  0.606  0.344  0.943  1.0
  O  O36  1  0.009  0.306  0.044  1.0
[/CIF]
.
The structure described by MgMn6(PO4)6 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(16), one O(21), one O(4), and one O(5) atom to form MgO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, and  a cornercorner with one P(5)O4 tetrahedra. There are six inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(10), one O(15), one O(24), and one O(3) atom to form distorted MnO4 trigonal pyramids that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra, and  a cornercorner with one P(6)O4 tetrahedra. In the second Mn site, Mn(2) is bonded to one O(1), one O(12), one O(14), and one O(8) atom to form distorted MnO4 trigonal pyramids 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  a cornercorner with one P(6)O4 tetrahedra. In the third Mn site, Mn(3) is bonded in a distorted see-saw-like geometry to one O(11), one O(16), one O(7), and one O(9) atom. In the fourth Mn site, Mn(4) is bonded in a 5-coordinate geometry to one O(13), one O(21), one O(4), one O(6), and one O(7) atom. In the fifth Mn site, Mn(5) is bonded in a rectangular see-saw-like geometry to one O(20), one O(22), one O(23), and one O(5) atom. In the sixth Mn site, Mn(6) is bonded in a distorted see-saw-like geometry to one O(17), one O(18), one O(19), and one O(2) atom. There are six inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(17), one O(21), and one O(23) atom to form PO4 tetrahedra that share  a cornercorner with one Mg(1)O4 tetrahedra and  a cornercorner with one Mn(2)O4 trigonal pyramid. In the second P site, P(2) is bonded to one O(19), one O(24), one O(5), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Mg(1)O4 tetrahedra and  a cornercorner with one Mn(1)O4 trigonal pyramid. In the third P site, P(3) is bonded to one O(11), one O(12), one O(15), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one Mn(1)O4 trigonal pyramid and  a cornercorner with one Mn(2)O4 trigonal pyramid. In the fourth P site, P(4) is bonded to one O(18), one O(22), one O(4), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Mg(1)O4 tetrahedra and  a cornercorner with one Mn(2)O4 trigonal pyramid. In the fifth P site, P(5) is bonded to one O(16), one O(2), one O(20), and one O(3) atom to form PO4 tetrahedra that share  a cornercorner with one Mg(1)O4 tetrahedra and  a cornercorner with one Mn(1)O4 trigonal pyramid. In the sixth P site, P(6) is bonded to one O(10), one O(13), one O(14), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Mn(1)O4 trigonal pyramid and  a cornercorner with one Mn(2)O4 trigonal pyramid. There are twenty-four inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Mn(2) and one P(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Mn(6) and one P(5) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Mn(1) and one P(5) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Mn(4), and one P(4) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Mg(1), one Mn(5), and one P(2) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one Mn(4) and one P(3) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Mn(3), one Mn(4), and one P(6) atom. In the eighth O site, O(8) is bonded in a bent 150 degrees geometry to one Mn(2) and one P(4) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Mn(3) and one P(2) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Mn(1) and one P(6) atom. In the eleventh O site, O(11) is bonded in a bent 150 degrees geometry to one Mn(3) and one P(3) atom. In the twelfth O site, O(12) is bonded in a bent 150 degrees geometry to one Mn(2) and one P(3) atom. In the thirteenth O site, O(13) is bonded in an L-shaped geometry to one Mn(4) and one P(6) atom. In the fourteenth O site, O(14) is bonded in a bent 150 degrees geometry to one Mn(2) and one P(6) atom. In the fifteenth O site, O(15) is bonded in a bent 150 degrees geometry to one Mn(1) and one P(3) atom. In the sixteenth O site, O(16) is bonded in a trigonal planar geometry to one Mg(1), one Mn(3), and one P(5) atom. In the seventeenth O site, O(17) is bonded in a bent 120 degrees geometry to one Mn(6) and one P(1) atom. In the eighteenth O site, O(18) is bonded in a bent 150 degrees geometry to one Mn(6) and one P(4) atom. In the nineteenth O site, O(19) is bonded in a bent 150 degrees geometry to one Mn(6) and one P(2) atom. In the twentieth O site, O(20) is bonded in a bent 120 degrees geometry to one Mn(5) and one P(5) atom. In the twenty-first O site, O(21) is bonded in a distorted T-shaped geometry to one Mg(1), one Mn(4), and one P(1) atom. In the twenty-second O site, O(22) is bonded in a distorted bent 150 degrees geometry to one Mn(5) and one P(4) atom. In the twenty-third O site, O(23) is bonded in a distorted bent 120 degrees geometry to one Mn(5) and one P(1) atom. In the twenty-fourth O site, O(24) is bonded in a bent 150 degrees geometry to one Mn(1) and one P(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgMn6(PO4)6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.538
_cell_length_b   9.245
_cell_length_c   8.654
_cell_angle_alpha   108.633
_cell_angle_beta   107.418
_cell_angle_gamma   107.881
_symmetry_Int_Tables_number   1
_cell_volume   552.947
_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
  Mg  Mg0  1  0.508  0.605  0.101  1.0
  Mn  Mn1  1  0.042  0.449  0.273  1.0
  Mn  Mn2  1  0.279  0.064  0.443  1.0
  Mn  Mn3  1  0.789  0.929  0.566  1.0
  Mn  Mn4  1  0.537  0.803  0.873  1.0
  Mn  Mn5  1  0.447  0.229  0.046  1.0
  Mn  Mn6  1  0.923  0.534  0.760  1.0
  P  P7  1  0.554  0.396  0.791  1.0
  P  P8  1  0.092  0.297  0.907  1.0
  P  P9  1  0.892  0.081  0.268  1.0
  P  P10  1  0.307  0.867  0.068  1.0
  P  P11  1  0.772  0.566  0.409  1.0
  P  P12  1  0.365  0.781  0.551  1.0
  O  O13  1  0.352  0.276  0.642  1.0
  O  O14  1  0.854  0.649  0.621  1.0
  O  O15  1  0.935  0.590  0.357  1.0
  O  O16  1  0.427  0.768  0.045  1.0
  O  O17  1  0.305  0.382  0.016  1.0
  O  O18  1  0.761  0.986  0.061  1.0
  O  O19  1  0.579  0.847  0.657  1.0
  O  O20  1  0.364  0.967  0.272  1.0
  O  O21  1  0.027  0.110  0.781  1.0
  O  O22  1  0.280  0.645  0.352  1.0
  O  O23  1  0.804  0.018  0.377  1.0
  O  O24  1  0.064  0.051  0.280  1.0
  O  O25  1  0.300  0.695  0.665  1.0
  O  O26  1  0.326  0.937  0.574  1.0
  O  O27  1  0.943  0.275  0.336  1.0
  O  O28  1  0.690  0.682  0.352  1.0
  O  O29  1  0.676  0.385  0.691  1.0
  O  O30  1  0.104  0.737  0.976  1.0
  O  O31  1  0.037  0.393  0.800  1.0
  O  O32  1  0.626  0.383  0.317  1.0
  O  O33  1  0.571  0.580  0.883  1.0
  O  O34  1  0.350  0.982  0.979  1.0
  O  O35  1  0.606  0.344  0.943  1.0
  O  O36  1  0.009  0.306  0.044  1.0
[/CIF]
.