The compound described by YCu3Mn4O12 crystallizes in the monoclinic Cm space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded to one O(14), one O(2), one O(3), one O(5), two equivalent O(10), two equivalent O(11), two equivalent O(15), and two equivalent O(8) atoms to form YO12 cuboctahedra that share faces with two equivalent Mn(3)O6 octahedra, faces with two equivalent Mn(4)O6 octahedra, and faces with four equivalent Mn(2)O6 octahedra. In the second Y site, Y(2) is bonded to one O(1), one O(13), one O(4), one O(6), two equivalent O(12), two equivalent O(16), two equivalent O(7), and two equivalent O(9) atoms to form YO12 cuboctahedra that share faces with two equivalent Mn(3)O6 octahedra, faces with two equivalent Mn(4)O6 octahedra, and faces with four equivalent Mn(1)O6 octahedra. There are four inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(12), one O(16), one O(4), one O(7), and one O(9) atom to form MnO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mn(3)O6 octahedra, corners with two equivalent Mn(4)O6 octahedra, and faces with two equivalent Y(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 39-42°. In the second Mn site, Mn(2) is bonded to one O(10), one O(11), one O(15), one O(2), one O(3), and one O(8) atom to form MnO6 octahedra that share corners with two equivalent Mn(2)O6 octahedra, corners with two equivalent Mn(3)O6 octahedra, corners with two equivalent Mn(4)O6 octahedra, and faces with two equivalent Y(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 40-43°. In the third Mn site, Mn(3) is bonded to one O(11), one O(13), one O(15), one O(5), one O(7), and one O(9) atom to form MnO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra, corners with two equivalent Mn(3)O6 octahedra,  a faceface with one Y(1)O12 cuboctahedra, and  a faceface with one Y(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 39-43°. In the fourth Mn site, Mn(4) is bonded to one O(10), one O(12), one O(14), one O(16), one O(6), and one O(8) atom to form MnO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra, corners with two equivalent Mn(4)O6 octahedra,  a faceface with one Y(1)O12 cuboctahedra, and  a faceface with one Y(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 41-42°. There are six inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a square co-planar geometry to two equivalent O(16) and two equivalent O(7) atoms. In the second Cu site, Cu(2) is bonded in a square co-planar geometry to one O(1), one O(13), one O(3), and one O(5) atom. In the third Cu site, Cu(3) is bonded in a square co-planar geometry to one O(14), one O(2), one O(4), and one O(6) atom. In the fourth Cu site, Cu(4) is bonded in a square co-planar geometry to two equivalent O(11) and two equivalent O(9) atoms. In the fifth Cu site, Cu(5) is bonded in a square co-planar geometry to two equivalent O(10) and two equivalent O(12) atoms. In the sixth Cu site, Cu(6) is bonded in a square co-planar geometry to two equivalent O(15) and two equivalent O(8) atoms. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Y(2), two equivalent Mn(1), and one Cu(2) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Y(1), two equivalent Mn(2), and one Cu(3) atom. In the third O site, O(3) is bonded to one Y(1), two equivalent Mn(2), and one Cu(2) atom to form a mixture of distorted edge and corner-sharing OYMn2Cu tetrahedra. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Y(2), two equivalent Mn(1), and one Cu(3) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Y(1), two equivalent Mn(3), and one Cu(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Y(2), two equivalent Mn(4), and one Cu(3) atom. In the seventh O site, O(7) is bonded to one Y(2), one Mn(1), one Mn(3), and one Cu(1) atom to form a mixture of distorted edge and corner-sharing OYMn2Cu tetrahedra. In the eighth O site, O(8) is bonded to one Y(1), one Mn(2), one Mn(4), and one Cu(6) atom to form a mixture of distorted edge and corner-sharing OYMn2Cu tetrahedra. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Y(2), one Mn(1), one Mn(3), and one Cu(4) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one Y(1), one Mn(2), one Mn(4), and one Cu(5) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Y(1), one Mn(2), one Mn(3), and one Cu(4) atom. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one Y(2), one Mn(1), one Mn(4), and one Cu(5) atom. In the thirteenth O site, O(13) is bonded in a 4-coordinate geometry to one Y(2), two equivalent Mn(3), and one Cu(2) atom. In the fourteenth O site, O(14) is bonded in a 3-coordinate geometry to one Y(1), two equivalent Mn(4), and one Cu(3) atom. In the fifteenth O site, O(15) is bonded to one Y(1), one Mn(2), one Mn(3), and one Cu(6) atom to form a mixture of distorted edge and corner-sharing OYMn2Cu tetrahedra. In the sixteenth O site, O(16) is bonded to one Y(2), one Mn(1), one Mn(4), and one Cu(1) atom to form a mixture of distorted edge and corner-sharing OYMn2Cu tetrahedra. is represented by the CIF file [CIF]
data_YMn4(CuO4)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.407
_cell_length_b   6.409
_cell_length_c   6.418
_cell_angle_alpha   110.107
_cell_angle_beta   108.595
_cell_angle_gamma   109.605
_symmetry_Int_Tables_number   1
_cell_volume   203.132
_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
  Cu  Cu0  1  0.500  0.500  1.000  1.0
  Cu  Cu1  1  0.500  0.000  0.500  1.0
  Cu  Cu2  1  0.000  0.500  0.500  1.0
  Mn  Mn3  1  0.500  0.500  0.500  1.0
  Mn  Mn4  1  0.500  1.000  1.000  1.0
  Mn  Mn5  1  0.000  1.000  0.500  1.0
  Mn  Mn6  1  0.000  0.500  0.000  1.0
  O  O7  1  0.700  0.827  0.527  1.0
  O  O8  1  0.301  0.173  0.473  1.0
  O  O9  1  0.300  0.827  0.128  1.0
  O  O10  1  0.130  0.299  0.831  1.0
  O  O11  1  0.171  0.476  0.305  1.0
  O  O12  1  0.829  0.134  0.305  1.0
  O  O13  1  0.532  0.702  0.831  1.0
  O  O14  1  0.829  0.524  0.695  1.0
  O  O15  1  0.700  0.173  0.872  1.0
  O  O16  1  0.870  0.701  0.169  1.0
  O  O17  1  0.171  0.866  0.695  1.0
  O  O18  1  0.468  0.298  0.169  1.0
  Y  Y19  1  1.000  0.000  1.000  1.0
[/CIF]
.
The compound described by YCu3Mn4O12 crystallizes in the monoclinic Cm space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded to one O(14), one O(2), one O(3), one O(5), two equivalent O(10), two equivalent O(11), two equivalent O(15), and two equivalent O(8) atoms to form YO12 cuboctahedra that share faces with two equivalent Mn(3)O6 octahedra, faces with two equivalent Mn(4)O6 octahedra, and faces with four equivalent Mn(2)O6 octahedra. In the second Y site, Y(2) is bonded to one O(1), one O(13), one O(4), one O(6), two equivalent O(12), two equivalent O(16), two equivalent O(7), and two equivalent O(9) atoms to form YO12 cuboctahedra that share faces with two equivalent Mn(3)O6 octahedra, faces with two equivalent Mn(4)O6 octahedra, and faces with four equivalent Mn(1)O6 octahedra. There are four inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(12), one O(16), one O(4), one O(7), and one O(9) atom to form MnO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mn(3)O6 octahedra, corners with two equivalent Mn(4)O6 octahedra, and faces with two equivalent Y(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 39-42°. In the second Mn site, Mn(2) is bonded to one O(10), one O(11), one O(15), one O(2), one O(3), and one O(8) atom to form MnO6 octahedra that share corners with two equivalent Mn(2)O6 octahedra, corners with two equivalent Mn(3)O6 octahedra, corners with two equivalent Mn(4)O6 octahedra, and faces with two equivalent Y(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 40-43°. In the third Mn site, Mn(3) is bonded to one O(11), one O(13), one O(15), one O(5), one O(7), and one O(9) atom to form MnO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra, corners with two equivalent Mn(3)O6 octahedra,  a faceface with one Y(1)O12 cuboctahedra, and  a faceface with one Y(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 39-43°. In the fourth Mn site, Mn(4) is bonded to one O(10), one O(12), one O(14), one O(16), one O(6), and one O(8) atom to form MnO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra, corners with two equivalent Mn(4)O6 octahedra,  a faceface with one Y(1)O12 cuboctahedra, and  a faceface with one Y(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 41-42°. There are six inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a square co-planar geometry to two equivalent O(16) and two equivalent O(7) atoms. In the second Cu site, Cu(2) is bonded in a square co-planar geometry to one O(1), one O(13), one O(3), and one O(5) atom. In the third Cu site, Cu(3) is bonded in a square co-planar geometry to one O(14), one O(2), one O(4), and one O(6) atom. In the fourth Cu site, Cu(4) is bonded in a square co-planar geometry to two equivalent O(11) and two equivalent O(9) atoms. In the fifth Cu site, Cu(5) is bonded in a square co-planar geometry to two equivalent O(10) and two equivalent O(12) atoms. In the sixth Cu site, Cu(6) is bonded in a square co-planar geometry to two equivalent O(15) and two equivalent O(8) atoms. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Y(2), two equivalent Mn(1), and one Cu(2) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Y(1), two equivalent Mn(2), and one Cu(3) atom. In the third O site, O(3) is bonded to one Y(1), two equivalent Mn(2), and one Cu(2) atom to form a mixture of distorted edge and corner-sharing OYMn2Cu tetrahedra. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Y(2), two equivalent Mn(1), and one Cu(3) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Y(1), two equivalent Mn(3), and one Cu(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Y(2), two equivalent Mn(4), and one Cu(3) atom. In the seventh O site, O(7) is bonded to one Y(2), one Mn(1), one Mn(3), and one Cu(1) atom to form a mixture of distorted edge and corner-sharing OYMn2Cu tetrahedra. In the eighth O site, O(8) is bonded to one Y(1), one Mn(2), one Mn(4), and one Cu(6) atom to form a mixture of distorted edge and corner-sharing OYMn2Cu tetrahedra. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Y(2), one Mn(1), one Mn(3), and one Cu(4) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one Y(1), one Mn(2), one Mn(4), and one Cu(5) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Y(1), one Mn(2), one Mn(3), and one Cu(4) atom. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one Y(2), one Mn(1), one Mn(4), and one Cu(5) atom. In the thirteenth O site, O(13) is bonded in a 4-coordinate geometry to one Y(2), two equivalent Mn(3), and one Cu(2) atom. In the fourteenth O site, O(14) is bonded in a 3-coordinate geometry to one Y(1), two equivalent Mn(4), and one Cu(3) atom. In the fifteenth O site, O(15) is bonded to one Y(1), one Mn(2), one Mn(3), and one Cu(6) atom to form a mixture of distorted edge and corner-sharing OYMn2Cu tetrahedra. In the sixteenth O site, O(16) is bonded to one Y(2), one Mn(1), one Mn(4), and one Cu(1) atom to form a mixture of distorted edge and corner-sharing OYMn2Cu tetrahedra. is represented by the CIF file [CIF]
data_YMn4(CuO4)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.407
_cell_length_b   6.409
_cell_length_c   6.418
_cell_angle_alpha   110.107
_cell_angle_beta   108.595
_cell_angle_gamma   109.605
_symmetry_Int_Tables_number   1
_cell_volume   203.132
_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
  Cu  Cu0  1  0.500  0.500  1.000  1.0
  Cu  Cu1  1  0.500  0.000  0.500  1.0
  Cu  Cu2  1  0.000  0.500  0.500  1.0
  Mn  Mn3  1  0.500  0.500  0.500  1.0
  Mn  Mn4  1  0.500  1.000  1.000  1.0
  Mn  Mn5  1  0.000  1.000  0.500  1.0
  Mn  Mn6  1  0.000  0.500  0.000  1.0
  O  O7  1  0.700  0.827  0.527  1.0
  O  O8  1  0.301  0.173  0.473  1.0
  O  O9  1  0.300  0.827  0.128  1.0
  O  O10  1  0.130  0.299  0.831  1.0
  O  O11  1  0.171  0.476  0.305  1.0
  O  O12  1  0.829  0.134  0.305  1.0
  O  O13  1  0.532  0.702  0.831  1.0
  O  O14  1  0.829  0.524  0.695  1.0
  O  O15  1  0.700  0.173  0.872  1.0
  O  O16  1  0.870  0.701  0.169  1.0
  O  O17  1  0.171  0.866  0.695  1.0
  O  O18  1  0.468  0.298  0.169  1.0
  Y  Y19  1  1.000  0.000  1.000  1.0
[/CIF]
.