The material structure described by Nb4Mn2Zn3O16 crystallizes in the triclinic P1 space group. There are four inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to one O(1), one O(14), one O(15), one O(4), one O(5), and one O(9) atom to form distorted NbO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra, edges with two equivalent Nb(4)O6 octahedra, and  a faceface with one Zn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-59°. In the second Nb site, Nb(2) is bonded to one O(10), one O(13), one O(16), one O(2), one O(3), and one O(6) atom to form distorted NbO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra, corners with two equivalent Zn(1)O6 octahedra, and corners with two equivalent Zn(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 40-57°. In the third Nb site, Nb(3) is bonded in a 6-coordinate geometry to one O(10), one O(12), one O(16), one O(2), one O(3), and one O(7) atom. In the fourth Nb site, Nb(4) is bonded to one O(1), one O(11), one O(15), one O(4), one O(8), and one O(9) atom to form distorted NbO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra, corners with two equivalent Zn(1)O6 octahedra,  a cornercorner with one Zn(3)O4 tetrahedra, and edges with two equivalent Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 35-52°. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom to form MnO6 octahedra that share corners with two equivalent Nb(1)O6 octahedra, corners with two equivalent Nb(2)O6 octahedra, corners with two equivalent Nb(4)O6 octahedra, and edges with two equivalent Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 50-59°. In the second Mn site, Mn(2) is bonded to one O(1), one O(2), one O(5), one O(6), one O(7), and one O(8) atom to form MnO6 octahedra that share corners with two equivalent Nb(1)O6 octahedra, corners with two equivalent Nb(2)O6 octahedra, corners with two equivalent Nb(4)O6 octahedra, and edges with two equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-58°. There are three inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(12), one O(13), one O(14), one O(15), one O(16), and one O(9) atom to form distorted ZnO6 octahedra that share corners with two equivalent Nb(2)O6 octahedra, corners with two equivalent Nb(4)O6 octahedra, corners with two equivalent Zn(3)O4 tetrahedra, and  a faceface with one Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 35-57°. In the second Zn site, Zn(2) is bonded in a 4-coordinate geometry to one O(10), one O(11), one O(12), one O(14), and one O(9) atom. In the third Zn site, Zn(3) is bonded to one O(10), one O(11), one O(12), and one O(13) atom to form ZnO4 tetrahedra that share  a cornercorner with one Nb(4)O6 octahedra, corners with two equivalent Nb(2)O6 octahedra, and corners with two equivalent Zn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-78°. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Nb(1), one Nb(4), and one Mn(2) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Nb(2), one Nb(3), and one Mn(2) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Nb(2), one Nb(3), and one Mn(1) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Nb(1), one Nb(4), and one Mn(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Nb(1), one Mn(1), and one Mn(2) atom. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one Nb(2), one Mn(1), and one Mn(2) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Nb(3), one Mn(1), and one Mn(2) atom. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Nb(4), one Mn(1), and one Mn(2) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Nb(1), one Nb(4), one Zn(1), and one Zn(2) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one Nb(2), one Nb(3), one Zn(2), and one Zn(3) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal non-coplanar geometry to one Nb(4), one Zn(2), and one Zn(3) atom. In the twelfth O site, O(12) is bonded in a distorted tetrahedral geometry to one Nb(3), one Zn(1), one Zn(2), and one Zn(3) atom. In the thirteenth O site, O(13) is bonded in a distorted trigonal planar geometry to one Nb(2), one Zn(1), and one Zn(3) atom. In the fourteenth O site, O(14) is bonded in a distorted T-shaped geometry to one Nb(1), one Zn(1), and one Zn(2) atom. In the fifteenth O site, O(15) is bonded in a 3-coordinate geometry to one Nb(1), one Nb(4), and one Zn(1) atom. In the sixteenth O site, O(16) is bonded in a trigonal planar geometry to one Nb(2), one Nb(3), and one Zn(1) atom. is represented by the CIF file [CIF]
data_Mn2Nb4Zn3O16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.192
_cell_length_b   5.946
_cell_length_c   9.962
_cell_angle_alpha   102.487
_cell_angle_beta   90.039
_cell_angle_gamma   91.395
_symmetry_Int_Tables_number   1
_cell_volume   300.182
_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  0.246  0.639  0.994  1.0
  Mn  Mn1  1  0.758  0.346  0.997  1.0
  Nb  Nb2  1  0.252  0.054  0.777  1.0
  Nb  Nb3  1  0.241  0.289  0.252  1.0
  Nb  Nb4  1  0.734  0.947  0.219  1.0
  Nb  Nb5  1  0.758  0.704  0.747  1.0
  O  O6  1  0.928  0.040  0.868  1.0
  O  O7  1  0.578  0.196  0.132  1.0
  O  O8  1  0.061  0.958  0.137  1.0
  O  O9  1  0.414  0.798  0.865  1.0
  O  O10  1  0.446  0.312  0.886  1.0
  O  O11  1  0.080  0.432  0.104  1.0
  O  O12  1  0.561  0.689  0.110  1.0
  O  O13  1  0.922  0.556  0.889  1.0
  O  O14  1  0.563  0.921  0.645  1.0
  O  O15  1  0.919  0.280  0.348  1.0
  O  O16  1  0.649  0.444  0.610  1.0
  O  O17  1  0.858  0.842  0.388  1.0
  O  O18  1  0.364  0.567  0.366  1.0
  O  O19  1  0.137  0.156  0.618  1.0
  O  O20  1  0.061  0.738  0.649  1.0
  O  O21  1  0.423  0.075  0.350  1.0
  Zn  Zn22  1  0.235  0.876  0.465  1.0
  Zn  Zn23  1  0.773  0.129  0.556  1.0
  Zn  Zn24  1  0.723  0.555  0.436  1.0
[/CIF]
.
The material structure described by Nb4Mn2Zn3O16 crystallizes in the triclinic P1 space group. There are four inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to one O(1), one O(14), one O(15), one O(4), one O(5), and one O(9) atom to form distorted NbO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra, edges with two equivalent Nb(4)O6 octahedra, and  a faceface with one Zn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-59°. In the second Nb site, Nb(2) is bonded to one O(10), one O(13), one O(16), one O(2), one O(3), and one O(6) atom to form distorted NbO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra, corners with two equivalent Zn(1)O6 octahedra, and corners with two equivalent Zn(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 40-57°. In the third Nb site, Nb(3) is bonded in a 6-coordinate geometry to one O(10), one O(12), one O(16), one O(2), one O(3), and one O(7) atom. In the fourth Nb site, Nb(4) is bonded to one O(1), one O(11), one O(15), one O(4), one O(8), and one O(9) atom to form distorted NbO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra, corners with two equivalent Zn(1)O6 octahedra,  a cornercorner with one Zn(3)O4 tetrahedra, and edges with two equivalent Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 35-52°. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom to form MnO6 octahedra that share corners with two equivalent Nb(1)O6 octahedra, corners with two equivalent Nb(2)O6 octahedra, corners with two equivalent Nb(4)O6 octahedra, and edges with two equivalent Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 50-59°. In the second Mn site, Mn(2) is bonded to one O(1), one O(2), one O(5), one O(6), one O(7), and one O(8) atom to form MnO6 octahedra that share corners with two equivalent Nb(1)O6 octahedra, corners with two equivalent Nb(2)O6 octahedra, corners with two equivalent Nb(4)O6 octahedra, and edges with two equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-58°. There are three inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(12), one O(13), one O(14), one O(15), one O(16), and one O(9) atom to form distorted ZnO6 octahedra that share corners with two equivalent Nb(2)O6 octahedra, corners with two equivalent Nb(4)O6 octahedra, corners with two equivalent Zn(3)O4 tetrahedra, and  a faceface with one Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 35-57°. In the second Zn site, Zn(2) is bonded in a 4-coordinate geometry to one O(10), one O(11), one O(12), one O(14), and one O(9) atom. In the third Zn site, Zn(3) is bonded to one O(10), one O(11), one O(12), and one O(13) atom to form ZnO4 tetrahedra that share  a cornercorner with one Nb(4)O6 octahedra, corners with two equivalent Nb(2)O6 octahedra, and corners with two equivalent Zn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-78°. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Nb(1), one Nb(4), and one Mn(2) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Nb(2), one Nb(3), and one Mn(2) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Nb(2), one Nb(3), and one Mn(1) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Nb(1), one Nb(4), and one Mn(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Nb(1), one Mn(1), and one Mn(2) atom. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one Nb(2), one Mn(1), and one Mn(2) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Nb(3), one Mn(1), and one Mn(2) atom. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Nb(4), one Mn(1), and one Mn(2) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Nb(1), one Nb(4), one Zn(1), and one Zn(2) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one Nb(2), one Nb(3), one Zn(2), and one Zn(3) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal non-coplanar geometry to one Nb(4), one Zn(2), and one Zn(3) atom. In the twelfth O site, O(12) is bonded in a distorted tetrahedral geometry to one Nb(3), one Zn(1), one Zn(2), and one Zn(3) atom. In the thirteenth O site, O(13) is bonded in a distorted trigonal planar geometry to one Nb(2), one Zn(1), and one Zn(3) atom. In the fourteenth O site, O(14) is bonded in a distorted T-shaped geometry to one Nb(1), one Zn(1), and one Zn(2) atom. In the fifteenth O site, O(15) is bonded in a 3-coordinate geometry to one Nb(1), one Nb(4), and one Zn(1) atom. In the sixteenth O site, O(16) is bonded in a trigonal planar geometry to one Nb(2), one Nb(3), and one Zn(1) atom. is represented by the CIF file [CIF]
data_Mn2Nb4Zn3O16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.192
_cell_length_b   5.946
_cell_length_c   9.962
_cell_angle_alpha   102.487
_cell_angle_beta   90.039
_cell_angle_gamma   91.395
_symmetry_Int_Tables_number   1
_cell_volume   300.182
_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  0.246  0.639  0.994  1.0
  Mn  Mn1  1  0.758  0.346  0.997  1.0
  Nb  Nb2  1  0.252  0.054  0.777  1.0
  Nb  Nb3  1  0.241  0.289  0.252  1.0
  Nb  Nb4  1  0.734  0.947  0.219  1.0
  Nb  Nb5  1  0.758  0.704  0.747  1.0
  O  O6  1  0.928  0.040  0.868  1.0
  O  O7  1  0.578  0.196  0.132  1.0
  O  O8  1  0.061  0.958  0.137  1.0
  O  O9  1  0.414  0.798  0.865  1.0
  O  O10  1  0.446  0.312  0.886  1.0
  O  O11  1  0.080  0.432  0.104  1.0
  O  O12  1  0.561  0.689  0.110  1.0
  O  O13  1  0.922  0.556  0.889  1.0
  O  O14  1  0.563  0.921  0.645  1.0
  O  O15  1  0.919  0.280  0.348  1.0
  O  O16  1  0.649  0.444  0.610  1.0
  O  O17  1  0.858  0.842  0.388  1.0
  O  O18  1  0.364  0.567  0.366  1.0
  O  O19  1  0.137  0.156  0.618  1.0
  O  O20  1  0.061  0.738  0.649  1.0
  O  O21  1  0.423  0.075  0.350  1.0
  Zn  Zn22  1  0.235  0.876  0.465  1.0
  Zn  Zn23  1  0.773  0.129  0.556  1.0
  Zn  Zn24  1  0.723  0.555  0.436  1.0
[/CIF]
.