The structure described by Mn3Cu(PO4)4 crystallizes in the monoclinic Pm space group. There are three inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(3), one O(7), two equivalent O(11), and two equivalent O(5) atoms to form distorted MnO6 pentagonal pyramids that share corners with four equivalent Mn(3)O6 pentagonal pyramids,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, and  an edgeedge with one P(4)O4 tetrahedra. In the second Mn site, Mn(2) is bonded to one O(10), one O(6), two equivalent O(2), and two equivalent O(8) atoms to form distorted MnO6 pentagonal pyramids that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, corners with two equivalent P(3)O4 tetrahedra, and  an edgeedge with one P(1)O4 tetrahedra. In the third Mn site, Mn(3) is bonded to one O(1), one O(9), two equivalent O(11), and two equivalent O(5) atoms to form distorted MnO6 pentagonal pyramids that share corners with four equivalent Mn(1)O6 pentagonal pyramids,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, corners with two equivalent P(4)O4 tetrahedra, and  an edgeedge with one P(2)O4 tetrahedra. Cu(1) is bonded in a 6-coordinate geometry to one O(12), one O(4), two equivalent O(2), and two equivalent O(8) atoms. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(10), and two equivalent O(2) atoms to form PO4 tetrahedra that share  a cornercorner with one Mn(2)O6 pentagonal pyramid,  a cornercorner with one Mn(3)O6 pentagonal pyramid, and  an edgeedge with one Mn(2)O6 pentagonal pyramid. In the second P site, P(2) is bonded to one O(6), one O(9), and two equivalent O(5) atoms to form PO4 tetrahedra that share  a cornercorner with one Mn(2)O6 pentagonal pyramid,  a cornercorner with one Mn(3)O6 pentagonal pyramid, corners with two equivalent Mn(1)O6 pentagonal pyramids, and  an edgeedge with one Mn(3)O6 pentagonal pyramid. In the third P site, P(3) is bonded to one O(4), one O(7), and two equivalent O(8) atoms to form PO4 tetrahedra that share  a cornercorner with one Mn(1)O6 pentagonal pyramid and corners with two equivalent Mn(2)O6 pentagonal pyramids. In the fourth P site, P(4) is bonded to one O(12), one O(3), and two equivalent O(11) atoms to form PO4 tetrahedra that share  a cornercorner with one Mn(1)O6 pentagonal pyramid, corners with two equivalent Mn(3)O6 pentagonal pyramids, and  an edgeedge with one Mn(1)O6 pentagonal pyramid. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Mn(3) and one P(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Mn(2), one Cu(1), and one P(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Mn(1) and one P(4) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Cu(1) and one P(3) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Mn(1), one Mn(3), and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Mn(2) and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Mn(1) and one P(3) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Mn(2), one Cu(1), and one P(3) atom. In the ninth O site, O(9) is bonded in a 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(2) and one P(1) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Mn(1), one Mn(3), and one P(4) atom. In the twelfth O site, O(12) is bonded in a distorted bent 120 degrees geometry to one Cu(1) and one P(4) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Mn3Cu(PO4)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.009
_cell_length_b   4.905
_cell_length_c   9.830
_cell_angle_alpha   89.211
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   289.697
_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
  Mn  Mn0  1  0.000  0.435  0.786  1.0
  Mn  Mn1  1  0.500  0.558  0.214  1.0
  Mn  Mn2  1  0.500  0.934  0.717  1.0
  Cu  Cu3  1  0.000  0.093  0.290  1.0
  P  P4  1  0.500  0.080  0.399  1.0
  P  P5  1  0.500  0.412  0.902  1.0
  P  P6  1  0.000  0.579  0.101  1.0
  P  P7  1  0.000  0.923  0.599  1.0
  O  O8  1  0.500  0.145  0.552  1.0
  O  O9  1  0.302  0.233  0.327  1.0
  O  O10  1  0.698  0.233  0.327  1.0
  O  O11  1  0.000  0.233  0.620  1.0
  O  O12  1  0.000  0.264  0.118  1.0
  O  O13  1  0.300  0.272  0.829  1.0
  O  O14  1  0.700  0.272  0.829  1.0
  O  O15  1  0.500  0.342  0.054  1.0
  O  O16  1  0.000  0.646  0.947  1.0
  O  O17  1  0.797  0.716  0.170  1.0
  O  O18  1  0.203  0.716  0.170  1.0
  O  O19  1  0.500  0.725  0.883  1.0
  O  O20  1  0.500  0.772  0.378  1.0
  O  O21  1  0.801  0.775  0.671  1.0
  O  O22  1  0.199  0.775  0.671  1.0
  O  O23  1  0.000  0.868  0.445  1.0
[/CIF]
.
The structure described by Mn3Cu(PO4)4 crystallizes in the monoclinic Pm space group. There are three inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(3), one O(7), two equivalent O(11), and two equivalent O(5) atoms to form distorted MnO6 pentagonal pyramids that share corners with four equivalent Mn(3)O6 pentagonal pyramids,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, and  an edgeedge with one P(4)O4 tetrahedra. In the second Mn site, Mn(2) is bonded to one O(10), one O(6), two equivalent O(2), and two equivalent O(8) atoms to form distorted MnO6 pentagonal pyramids that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, corners with two equivalent P(3)O4 tetrahedra, and  an edgeedge with one P(1)O4 tetrahedra. In the third Mn site, Mn(3) is bonded to one O(1), one O(9), two equivalent O(11), and two equivalent O(5) atoms to form distorted MnO6 pentagonal pyramids that share corners with four equivalent Mn(1)O6 pentagonal pyramids,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, corners with two equivalent P(4)O4 tetrahedra, and  an edgeedge with one P(2)O4 tetrahedra. Cu(1) is bonded in a 6-coordinate geometry to one O(12), one O(4), two equivalent O(2), and two equivalent O(8) atoms. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(10), and two equivalent O(2) atoms to form PO4 tetrahedra that share  a cornercorner with one Mn(2)O6 pentagonal pyramid,  a cornercorner with one Mn(3)O6 pentagonal pyramid, and  an edgeedge with one Mn(2)O6 pentagonal pyramid. In the second P site, P(2) is bonded to one O(6), one O(9), and two equivalent O(5) atoms to form PO4 tetrahedra that share  a cornercorner with one Mn(2)O6 pentagonal pyramid,  a cornercorner with one Mn(3)O6 pentagonal pyramid, corners with two equivalent Mn(1)O6 pentagonal pyramids, and  an edgeedge with one Mn(3)O6 pentagonal pyramid. In the third P site, P(3) is bonded to one O(4), one O(7), and two equivalent O(8) atoms to form PO4 tetrahedra that share  a cornercorner with one Mn(1)O6 pentagonal pyramid and corners with two equivalent Mn(2)O6 pentagonal pyramids. In the fourth P site, P(4) is bonded to one O(12), one O(3), and two equivalent O(11) atoms to form PO4 tetrahedra that share  a cornercorner with one Mn(1)O6 pentagonal pyramid, corners with two equivalent Mn(3)O6 pentagonal pyramids, and  an edgeedge with one Mn(1)O6 pentagonal pyramid. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Mn(3) and one P(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Mn(2), one Cu(1), and one P(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Mn(1) and one P(4) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Cu(1) and one P(3) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Mn(1), one Mn(3), and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Mn(2) and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Mn(1) and one P(3) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Mn(2), one Cu(1), and one P(3) atom. In the ninth O site, O(9) is bonded in a 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(2) and one P(1) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Mn(1), one Mn(3), and one P(4) atom. In the twelfth O site, O(12) is bonded in a distorted bent 120 degrees geometry to one Cu(1) and one P(4) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Mn3Cu(PO4)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.009
_cell_length_b   4.905
_cell_length_c   9.830
_cell_angle_alpha   89.211
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   289.697
_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
  Mn  Mn0  1  0.000  0.435  0.786  1.0
  Mn  Mn1  1  0.500  0.558  0.214  1.0
  Mn  Mn2  1  0.500  0.934  0.717  1.0
  Cu  Cu3  1  0.000  0.093  0.290  1.0
  P  P4  1  0.500  0.080  0.399  1.0
  P  P5  1  0.500  0.412  0.902  1.0
  P  P6  1  0.000  0.579  0.101  1.0
  P  P7  1  0.000  0.923  0.599  1.0
  O  O8  1  0.500  0.145  0.552  1.0
  O  O9  1  0.302  0.233  0.327  1.0
  O  O10  1  0.698  0.233  0.327  1.0
  O  O11  1  0.000  0.233  0.620  1.0
  O  O12  1  0.000  0.264  0.118  1.0
  O  O13  1  0.300  0.272  0.829  1.0
  O  O14  1  0.700  0.272  0.829  1.0
  O  O15  1  0.500  0.342  0.054  1.0
  O  O16  1  0.000  0.646  0.947  1.0
  O  O17  1  0.797  0.716  0.170  1.0
  O  O18  1  0.203  0.716  0.170  1.0
  O  O19  1  0.500  0.725  0.883  1.0
  O  O20  1  0.500  0.772  0.378  1.0
  O  O21  1  0.801  0.775  0.671  1.0
  O  O22  1  0.199  0.775  0.671  1.0
  O  O23  1  0.000  0.868  0.445  1.0
[/CIF]
.