The material described by Nb3Os2 crystallizes in the orthorhombic Cmm2 space group. There are seven inequivalent Nb sites. In the first Nb site, Nb(1) is bonded in a 15-coordinate geometry to one Nb(1), one Nb(6), two equivalent Nb(3), two equivalent Nb(5), two equivalent Nb(7), one Os(5), two equivalent Os(2), and four equivalent Os(4) atoms. In the second Nb site, Nb(2) is bonded in a 11-coordinate geometry to one Nb(2), two equivalent Nb(4), two equivalent Os(1), two equivalent Os(5), and four equivalent Os(3) atoms. In the third Nb site, Nb(3) is bonded in a 7-coordinate geometry to one Nb(1), one Nb(3), one Os(5), two equivalent Os(3), and two equivalent Os(4) atoms. In the fourth Nb site, Nb(4) is bonded in a 4-coordinate geometry to one Nb(2), two equivalent Os(3), and two equivalent Os(4) atoms. In the fifth Nb site, Nb(5) is bonded in a 7-coordinate geometry to two equivalent Nb(1), two equivalent Nb(7), one Os(2), two equivalent Os(3), and two equivalent Os(4) atoms. In the sixth Nb site, Nb(6) is bonded in a 7-coordinate geometry to one Nb(1), one Os(1), two equivalent Os(3), two equivalent Os(4), and two equivalent Os(5) atoms. In the seventh Nb site, Nb(7) is bonded in a 7-coordinate geometry to two equivalent Nb(1), two equivalent Nb(5), one Os(2), two equivalent Os(3), and two equivalent Os(4) atoms. There are five inequivalent Os sites. In the first Os site, Os(1) is bonded to two equivalent Nb(6), four equivalent Nb(2), two equivalent Os(5), and four equivalent Os(3) atoms to form distorted OsNb6Os6 cuboctahedra that share corners with eight equivalent Os(3)Nb9Os3 cuboctahedra, corners with eight equivalent Os(4)Nb9Os3 cuboctahedra, edges with two equivalent Os(1)Nb6Os6 cuboctahedra, and faces with four equivalent Os(3)Nb9Os3 cuboctahedra. In the second Os site, Os(2) is bonded to two equivalent Nb(5), two equivalent Nb(7), four equivalent Nb(1), and four equivalent Os(4) atoms to form OsNb8Os4 cuboctahedra that share corners with eight equivalent Os(3)Nb9Os3 cuboctahedra, corners with eight equivalent Os(4)Nb9Os3 cuboctahedra, edges with two equivalent Os(2)Nb8Os4 cuboctahedra, and faces with four equivalent Os(4)Nb9Os3 cuboctahedra. In the third Os site, Os(3) is bonded to one Nb(5), one Nb(6), one Nb(7), two equivalent Nb(2), two equivalent Nb(3), two equivalent Nb(4), one Os(1), one Os(3), and one Os(5) atom to form distorted OsNb9Os3 cuboctahedra that share corners with two equivalent Os(1)Nb6Os6 cuboctahedra, corners with two equivalent Os(2)Nb8Os4 cuboctahedra, corners with three equivalent Os(3)Nb9Os3 cuboctahedra, corners with four equivalent Os(4)Nb9Os3 cuboctahedra, edges with three equivalent Os(3)Nb9Os3 cuboctahedra,  a faceface with one Os(1)Nb6Os6 cuboctahedra, faces with two equivalent Os(3)Nb9Os3 cuboctahedra, and faces with four equivalent Os(4)Nb9Os3 cuboctahedra. In the fourth Os site, Os(4) is bonded to one Nb(5), one Nb(6), one Nb(7), two equivalent Nb(1), two equivalent Nb(3), two equivalent Nb(4), one Os(2), one Os(4), and one Os(5) atom to form distorted OsNb9Os3 cuboctahedra that share corners with two equivalent Os(1)Nb6Os6 cuboctahedra, corners with two equivalent Os(2)Nb8Os4 cuboctahedra, corners with three equivalent Os(4)Nb9Os3 cuboctahedra, corners with four equivalent Os(3)Nb9Os3 cuboctahedra, edges with three equivalent Os(4)Nb9Os3 cuboctahedra,  a faceface with one Os(2)Nb8Os4 cuboctahedra, faces with two equivalent Os(4)Nb9Os3 cuboctahedra, and faces with four equivalent Os(3)Nb9Os3 cuboctahedra. In the fifth Os site, Os(5) is bonded in a distorted linear geometry to one Nb(1), two equivalent Nb(2), two equivalent Nb(3), two equivalent Nb(6), one Os(1), two equivalent Os(3), and two equivalent Os(4) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Nb3Os2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.088
_cell_length_b   9.914
_cell_length_c   9.914
_cell_angle_alpha   89.814
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   500.065
_cell_formula_units_Z   6
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
  Nb  Nb0  1  0.504  0.105  0.895  1.0
  Nb  Nb1  1  0.504  0.895  0.105  1.0
  Nb  Nb2  1  0.991  0.398  0.398  1.0
  Nb  Nb3  1  0.991  0.602  0.602  1.0
  Nb  Nb4  1  0.502  0.372  0.961  1.0
  Nb  Nb5  1  0.502  0.628  0.039  1.0
  Nb  Nb6  1  0.004  0.129  0.466  1.0
  Nb  Nb7  1  0.004  0.871  0.534  1.0
  Nb  Nb8  1  0.502  0.961  0.372  1.0
  Nb  Nb9  1  0.502  0.039  0.628  1.0
  Nb  Nb10  1  0.004  0.466  0.129  1.0
  Nb  Nb11  1  0.004  0.534  0.871  1.0
  Nb  Nb12  1  0.750  0.181  0.181  1.0
  Nb  Nb13  1  0.750  0.819  0.819  1.0
  Nb  Nb14  1  0.752  0.680  0.320  1.0
  Nb  Nb15  1  0.752  0.320  0.680  1.0
  Nb  Nb16  1  0.251  0.819  0.819  1.0
  Nb  Nb17  1  0.251  0.181  0.181  1.0
  Os  Os18  1  0.473  0.500  0.500  1.0
  Os  Os19  1  0.002  0.000  0.000  1.0
  Os  Os20  1  0.500  0.435  0.244  1.0
  Os  Os21  1  0.500  0.565  0.756  1.0
  Os  Os22  1  0.003  0.071  0.741  1.0
  Os  Os23  1  0.003  0.929  0.259  1.0
  Os  Os24  1  0.500  0.244  0.435  1.0
  Os  Os25  1  0.500  0.756  0.565  1.0
  Os  Os26  1  0.003  0.741  0.071  1.0
  Os  Os27  1  0.003  0.259  0.929  1.0
  Os  Os28  1  0.250  0.319  0.681  1.0
  Os  Os29  1  0.250  0.681  0.319  1.0
[/CIF]
.
The material described by Nb3Os2 crystallizes in the orthorhombic Cmm2 space group. There are seven inequivalent Nb sites. In the first Nb site, Nb(1) is bonded in a 15-coordinate geometry to one Nb(1), one Nb(6), two equivalent Nb(3), two equivalent Nb(5), two equivalent Nb(7), one Os(5), two equivalent Os(2), and four equivalent Os(4) atoms. In the second Nb site, Nb(2) is bonded in a 11-coordinate geometry to one Nb(2), two equivalent Nb(4), two equivalent Os(1), two equivalent Os(5), and four equivalent Os(3) atoms. In the third Nb site, Nb(3) is bonded in a 7-coordinate geometry to one Nb(1), one Nb(3), one Os(5), two equivalent Os(3), and two equivalent Os(4) atoms. In the fourth Nb site, Nb(4) is bonded in a 4-coordinate geometry to one Nb(2), two equivalent Os(3), and two equivalent Os(4) atoms. In the fifth Nb site, Nb(5) is bonded in a 7-coordinate geometry to two equivalent Nb(1), two equivalent Nb(7), one Os(2), two equivalent Os(3), and two equivalent Os(4) atoms. In the sixth Nb site, Nb(6) is bonded in a 7-coordinate geometry to one Nb(1), one Os(1), two equivalent Os(3), two equivalent Os(4), and two equivalent Os(5) atoms. In the seventh Nb site, Nb(7) is bonded in a 7-coordinate geometry to two equivalent Nb(1), two equivalent Nb(5), one Os(2), two equivalent Os(3), and two equivalent Os(4) atoms. There are five inequivalent Os sites. In the first Os site, Os(1) is bonded to two equivalent Nb(6), four equivalent Nb(2), two equivalent Os(5), and four equivalent Os(3) atoms to form distorted OsNb6Os6 cuboctahedra that share corners with eight equivalent Os(3)Nb9Os3 cuboctahedra, corners with eight equivalent Os(4)Nb9Os3 cuboctahedra, edges with two equivalent Os(1)Nb6Os6 cuboctahedra, and faces with four equivalent Os(3)Nb9Os3 cuboctahedra. In the second Os site, Os(2) is bonded to two equivalent Nb(5), two equivalent Nb(7), four equivalent Nb(1), and four equivalent Os(4) atoms to form OsNb8Os4 cuboctahedra that share corners with eight equivalent Os(3)Nb9Os3 cuboctahedra, corners with eight equivalent Os(4)Nb9Os3 cuboctahedra, edges with two equivalent Os(2)Nb8Os4 cuboctahedra, and faces with four equivalent Os(4)Nb9Os3 cuboctahedra. In the third Os site, Os(3) is bonded to one Nb(5), one Nb(6), one Nb(7), two equivalent Nb(2), two equivalent Nb(3), two equivalent Nb(4), one Os(1), one Os(3), and one Os(5) atom to form distorted OsNb9Os3 cuboctahedra that share corners with two equivalent Os(1)Nb6Os6 cuboctahedra, corners with two equivalent Os(2)Nb8Os4 cuboctahedra, corners with three equivalent Os(3)Nb9Os3 cuboctahedra, corners with four equivalent Os(4)Nb9Os3 cuboctahedra, edges with three equivalent Os(3)Nb9Os3 cuboctahedra,  a faceface with one Os(1)Nb6Os6 cuboctahedra, faces with two equivalent Os(3)Nb9Os3 cuboctahedra, and faces with four equivalent Os(4)Nb9Os3 cuboctahedra. In the fourth Os site, Os(4) is bonded to one Nb(5), one Nb(6), one Nb(7), two equivalent Nb(1), two equivalent Nb(3), two equivalent Nb(4), one Os(2), one Os(4), and one Os(5) atom to form distorted OsNb9Os3 cuboctahedra that share corners with two equivalent Os(1)Nb6Os6 cuboctahedra, corners with two equivalent Os(2)Nb8Os4 cuboctahedra, corners with three equivalent Os(4)Nb9Os3 cuboctahedra, corners with four equivalent Os(3)Nb9Os3 cuboctahedra, edges with three equivalent Os(4)Nb9Os3 cuboctahedra,  a faceface with one Os(2)Nb8Os4 cuboctahedra, faces with two equivalent Os(4)Nb9Os3 cuboctahedra, and faces with four equivalent Os(3)Nb9Os3 cuboctahedra. In the fifth Os site, Os(5) is bonded in a distorted linear geometry to one Nb(1), two equivalent Nb(2), two equivalent Nb(3), two equivalent Nb(6), one Os(1), two equivalent Os(3), and two equivalent Os(4) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Nb3Os2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.088
_cell_length_b   9.914
_cell_length_c   9.914
_cell_angle_alpha   89.814
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   500.065
_cell_formula_units_Z   6
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
  Nb  Nb0  1  0.504  0.105  0.895  1.0
  Nb  Nb1  1  0.504  0.895  0.105  1.0
  Nb  Nb2  1  0.991  0.398  0.398  1.0
  Nb  Nb3  1  0.991  0.602  0.602  1.0
  Nb  Nb4  1  0.502  0.372  0.961  1.0
  Nb  Nb5  1  0.502  0.628  0.039  1.0
  Nb  Nb6  1  0.004  0.129  0.466  1.0
  Nb  Nb7  1  0.004  0.871  0.534  1.0
  Nb  Nb8  1  0.502  0.961  0.372  1.0
  Nb  Nb9  1  0.502  0.039  0.628  1.0
  Nb  Nb10  1  0.004  0.466  0.129  1.0
  Nb  Nb11  1  0.004  0.534  0.871  1.0
  Nb  Nb12  1  0.750  0.181  0.181  1.0
  Nb  Nb13  1  0.750  0.819  0.819  1.0
  Nb  Nb14  1  0.752  0.680  0.320  1.0
  Nb  Nb15  1  0.752  0.320  0.680  1.0
  Nb  Nb16  1  0.251  0.819  0.819  1.0
  Nb  Nb17  1  0.251  0.181  0.181  1.0
  Os  Os18  1  0.473  0.500  0.500  1.0
  Os  Os19  1  0.002  0.000  0.000  1.0
  Os  Os20  1  0.500  0.435  0.244  1.0
  Os  Os21  1  0.500  0.565  0.756  1.0
  Os  Os22  1  0.003  0.071  0.741  1.0
  Os  Os23  1  0.003  0.929  0.259  1.0
  Os  Os24  1  0.500  0.244  0.435  1.0
  Os  Os25  1  0.500  0.756  0.565  1.0
  Os  Os26  1  0.003  0.741  0.071  1.0
  Os  Os27  1  0.003  0.259  0.929  1.0
  Os  Os28  1  0.250  0.319  0.681  1.0
  Os  Os29  1  0.250  0.681  0.319  1.0
[/CIF]
.