The compound described by NaMn2O4 is Spinel structured and crystallizes in the orthorhombic Imma space group. Na(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form NaO4 tetrahedra that share corners with six equivalent Mn(1)O6 octahedra and corners with six equivalent Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 57-67°. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form distorted MnO6 octahedra that share corners with six equivalent Na(1)O4 tetrahedra, edges with two equivalent Mn(1)O6 octahedra, and edges with four equivalent Mn(2)O6 octahedra. In the second Mn site, Mn(2) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form MnO6 octahedra that share corners with six equivalent Na(1)O4 tetrahedra, edges with two equivalent Mn(2)O6 octahedra, and edges with four equivalent Mn(1)O6 octahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Mn(2), and two equivalent Mn(1) atoms to form a mixture of corner and edge-sharing ONaMn3 tetrahedra. In the second O site, O(2) is bonded to one Na(1), one Mn(1), and two equivalent Mn(2) atoms to form a mixture of distorted corner and edge-sharing ONaMn3 trigonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_NaMn2O4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.020
_cell_length_b   6.247
_cell_length_c   5.939
_cell_angle_alpha   61.624
_cell_angle_beta   89.981
_cell_angle_gamma   118.778
_symmetry_Int_Tables_number   1
_cell_volume   164.471
_cell_formula_units_Z   2
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
  Na  Na0  1  0.010  0.020  0.990  1.0
  Na  Na1  1  0.740  0.480  0.760  1.0
  Mn  Mn2  1  0.375  0.250  0.375  1.0
  Mn  Mn3  1  0.875  0.250  0.375  1.0
  Mn  Mn4  1  0.375  0.750  0.375  1.0
  Mn  Mn5  1  0.375  0.750  0.875  1.0
  O  O6  1  0.160  0.320  0.125  1.0
  O  O7  1  0.590  0.180  0.195  1.0
  O  O8  1  0.579  0.740  0.130  1.0
  O  O9  1  0.161  0.740  0.130  1.0
  O  O10  1  0.590  0.180  0.625  1.0
  O  O11  1  0.160  0.320  0.555  1.0
  O  O12  1  0.589  0.760  0.620  1.0
  O  O13  1  0.172  0.760  0.620  1.0
[/CIF]
.
The compound described by NaMn2O4 is Spinel structured and crystallizes in the orthorhombic Imma space group. Na(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form NaO4 tetrahedra that share corners with six equivalent Mn(1)O6 octahedra and corners with six equivalent Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 57-67°. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form distorted MnO6 octahedra that share corners with six equivalent Na(1)O4 tetrahedra, edges with two equivalent Mn(1)O6 octahedra, and edges with four equivalent Mn(2)O6 octahedra. In the second Mn site, Mn(2) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form MnO6 octahedra that share corners with six equivalent Na(1)O4 tetrahedra, edges with two equivalent Mn(2)O6 octahedra, and edges with four equivalent Mn(1)O6 octahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Mn(2), and two equivalent Mn(1) atoms to form a mixture of corner and edge-sharing ONaMn3 tetrahedra. In the second O site, O(2) is bonded to one Na(1), one Mn(1), and two equivalent Mn(2) atoms to form a mixture of distorted corner and edge-sharing ONaMn3 trigonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_NaMn2O4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.020
_cell_length_b   6.247
_cell_length_c   5.939
_cell_angle_alpha   61.624
_cell_angle_beta   89.981
_cell_angle_gamma   118.778
_symmetry_Int_Tables_number   1
_cell_volume   164.471
_cell_formula_units_Z   2
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
  Na  Na0  1  0.010  0.020  0.990  1.0
  Na  Na1  1  0.740  0.480  0.760  1.0
  Mn  Mn2  1  0.375  0.250  0.375  1.0
  Mn  Mn3  1  0.875  0.250  0.375  1.0
  Mn  Mn4  1  0.375  0.750  0.375  1.0
  Mn  Mn5  1  0.375  0.750  0.875  1.0
  O  O6  1  0.160  0.320  0.125  1.0
  O  O7  1  0.590  0.180  0.195  1.0
  O  O8  1  0.579  0.740  0.130  1.0
  O  O9  1  0.161  0.740  0.130  1.0
  O  O10  1  0.590  0.180  0.625  1.0
  O  O11  1  0.160  0.320  0.555  1.0
  O  O12  1  0.589  0.760  0.620  1.0
  O  O13  1  0.172  0.760  0.620  1.0
[/CIF]
.