The structure described by Na15Ge8SnP crystallizes in the orthorhombic Cmcm space group. There are six inequivalent Na sites. In the first Na site, Na(1) is bonded in a 5-coordinate geometry to one Ge(1), one Ge(2), two equivalent Ge(3), and one P(1) atom. In the second Na site, Na(2) is bonded in a 3-coordinate geometry to two equivalent Sn(1), one Ge(1), one Ge(2), and one P(1) atom. In the third Na site, Na(3) is bonded in a 6-coordinate geometry to two equivalent Sn(1), one Ge(1), one Ge(2), and two equivalent Ge(3) atoms. In the fourth Na site, Na(4) is bonded to one Sn(1), two equivalent Ge(3), and one P(1) atom to form corner-sharing NaSnGe2P tetrahedra. In the fifth Na site, Na(5) is bonded in a 5-coordinate geometry to one Sn(1), one Ge(2), two equivalent Ge(1), and two equivalent Ge(3) atoms. In the sixth Na site, Na(6) is bonded in a 5-coordinate geometry to four equivalent Ge(3) and one P(1) atom. Sn(1) is bonded in a 14-coordinate geometry to two equivalent Na(4), four equivalent Na(2), four equivalent Na(3), and four equivalent Na(5) atoms. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a distorted q6 geometry to one Na(2), one Na(3), two equivalent Na(1), four equivalent Na(5), one Ge(2), and two equivalent Ge(3) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to one Na(2), one Na(3), two equivalent Na(1), two equivalent Na(5), one Ge(1), and two equivalent Ge(3) atoms. In the third Ge site, Ge(3) is bonded in a 10-coordinate geometry to one Na(3), one Na(4), one Na(6), two equivalent Na(1), two equivalent Na(5), one Ge(1), one Ge(2), and one Ge(3) atom. P(1) is bonded in a 9-coordinate geometry to one Na(6), two equivalent Na(2), two equivalent Na(4), and four equivalent Na(1) atoms. is represented by the CIF file [CIF]
data_Na15SnGe8P
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.799
_cell_length_b   10.799
_cell_length_c   11.129
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   107.228
_symmetry_Int_Tables_number   1
_cell_volume   1239.466
_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  0.543  0.281  0.383  1.0
  Na  Na1  1  0.229  0.063  0.250  1.0
  Na  Na2  1  0.063  0.229  0.250  1.0
  Na  Na3  1  0.457  0.719  0.883  1.0
  Na  Na4  1  0.802  0.990  0.250  1.0
  Na  Na5  1  0.750  0.750  0.503  1.0
  Na  Na6  1  0.719  0.457  0.883  1.0
  Na  Na7  1  0.322  0.943  0.498  1.0
  Na  Na8  1  0.250  0.250  0.003  1.0
  Na  Na9  1  0.943  0.322  0.498  1.0
  Na  Na10  1  0.678  0.057  0.998  1.0
  Na  Na11  1  0.198  0.010  0.750  1.0
  Na  Na12  1  0.750  0.750  0.997  1.0
  Na  Na13  1  0.010  0.198  0.750  1.0
  Na  Na14  1  0.432  0.432  0.750  1.0
  Na  Na15  1  0.057  0.678  0.502  1.0
  Na  Na16  1  0.057  0.678  0.998  1.0
  Na  Na17  1  0.678  0.057  0.502  1.0
  Na  Na18  1  0.990  0.802  0.250  1.0
  Na  Na19  1  0.281  0.543  0.383  1.0
  Na  Na20  1  0.719  0.457  0.617  1.0
  Na  Na21  1  0.281  0.543  0.117  1.0
  Na  Na22  1  0.771  0.937  0.750  1.0
  Na  Na23  1  0.943  0.322  0.002  1.0
  Na  Na24  1  0.457  0.719  0.617  1.0
  Na  Na25  1  0.250  0.250  0.497  1.0
  Na  Na26  1  0.937  0.771  0.750  1.0
  Na  Na27  1  0.322  0.943  0.002  1.0
  Na  Na28  1  0.543  0.281  0.117  1.0
  Na  Na29  1  0.568  0.568  0.250  1.0
  Sn  Sn30  1  0.000  0.000  0.500  1.0
  Sn  Sn31  1  0.000  0.000  0.000  1.0
  Ge  Ge32  1  0.503  0.011  0.250  1.0
  Ge  Ge33  1  0.195  0.696  0.750  1.0
  Ge  Ge34  1  0.696  0.195  0.750  1.0
  Ge  Ge35  1  0.810  0.517  0.363  1.0
  Ge  Ge36  1  0.483  0.190  0.637  1.0
  Ge  Ge37  1  0.190  0.483  0.637  1.0
  Ge  Ge38  1  0.497  0.989  0.750  1.0
  Ge  Ge39  1  0.190  0.483  0.863  1.0
  Ge  Ge40  1  0.989  0.497  0.750  1.0
  Ge  Ge41  1  0.517  0.810  0.363  1.0
  Ge  Ge42  1  0.483  0.190  0.863  1.0
  Ge  Ge43  1  0.810  0.517  0.137  1.0
  Ge  Ge44  1  0.304  0.805  0.250  1.0
  Ge  Ge45  1  0.011  0.503  0.250  1.0
  Ge  Ge46  1  0.517  0.810  0.137  1.0
  Ge  Ge47  1  0.805  0.304  0.250  1.0
  P  P48  1  0.344  0.344  0.250  1.0
  P  P49  1  0.656  0.656  0.750  1.0
[/CIF]
.
The structure described by Na15Ge8SnP crystallizes in the orthorhombic Cmcm space group. There are six inequivalent Na sites. In the first Na site, Na(1) is bonded in a 5-coordinate geometry to one Ge(1), one Ge(2), two equivalent Ge(3), and one P(1) atom. In the second Na site, Na(2) is bonded in a 3-coordinate geometry to two equivalent Sn(1), one Ge(1), one Ge(2), and one P(1) atom. In the third Na site, Na(3) is bonded in a 6-coordinate geometry to two equivalent Sn(1), one Ge(1), one Ge(2), and two equivalent Ge(3) atoms. In the fourth Na site, Na(4) is bonded to one Sn(1), two equivalent Ge(3), and one P(1) atom to form corner-sharing NaSnGe2P tetrahedra. In the fifth Na site, Na(5) is bonded in a 5-coordinate geometry to one Sn(1), one Ge(2), two equivalent Ge(1), and two equivalent Ge(3) atoms. In the sixth Na site, Na(6) is bonded in a 5-coordinate geometry to four equivalent Ge(3) and one P(1) atom. Sn(1) is bonded in a 14-coordinate geometry to two equivalent Na(4), four equivalent Na(2), four equivalent Na(3), and four equivalent Na(5) atoms. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a distorted q6 geometry to one Na(2), one Na(3), two equivalent Na(1), four equivalent Na(5), one Ge(2), and two equivalent Ge(3) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to one Na(2), one Na(3), two equivalent Na(1), two equivalent Na(5), one Ge(1), and two equivalent Ge(3) atoms. In the third Ge site, Ge(3) is bonded in a 10-coordinate geometry to one Na(3), one Na(4), one Na(6), two equivalent Na(1), two equivalent Na(5), one Ge(1), one Ge(2), and one Ge(3) atom. P(1) is bonded in a 9-coordinate geometry to one Na(6), two equivalent Na(2), two equivalent Na(4), and four equivalent Na(1) atoms. is represented by the CIF file [CIF]
data_Na15SnGe8P
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.799
_cell_length_b   10.799
_cell_length_c   11.129
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   107.228
_symmetry_Int_Tables_number   1
_cell_volume   1239.466
_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  0.543  0.281  0.383  1.0
  Na  Na1  1  0.229  0.063  0.250  1.0
  Na  Na2  1  0.063  0.229  0.250  1.0
  Na  Na3  1  0.457  0.719  0.883  1.0
  Na  Na4  1  0.802  0.990  0.250  1.0
  Na  Na5  1  0.750  0.750  0.503  1.0
  Na  Na6  1  0.719  0.457  0.883  1.0
  Na  Na7  1  0.322  0.943  0.498  1.0
  Na  Na8  1  0.250  0.250  0.003  1.0
  Na  Na9  1  0.943  0.322  0.498  1.0
  Na  Na10  1  0.678  0.057  0.998  1.0
  Na  Na11  1  0.198  0.010  0.750  1.0
  Na  Na12  1  0.750  0.750  0.997  1.0
  Na  Na13  1  0.010  0.198  0.750  1.0
  Na  Na14  1  0.432  0.432  0.750  1.0
  Na  Na15  1  0.057  0.678  0.502  1.0
  Na  Na16  1  0.057  0.678  0.998  1.0
  Na  Na17  1  0.678  0.057  0.502  1.0
  Na  Na18  1  0.990  0.802  0.250  1.0
  Na  Na19  1  0.281  0.543  0.383  1.0
  Na  Na20  1  0.719  0.457  0.617  1.0
  Na  Na21  1  0.281  0.543  0.117  1.0
  Na  Na22  1  0.771  0.937  0.750  1.0
  Na  Na23  1  0.943  0.322  0.002  1.0
  Na  Na24  1  0.457  0.719  0.617  1.0
  Na  Na25  1  0.250  0.250  0.497  1.0
  Na  Na26  1  0.937  0.771  0.750  1.0
  Na  Na27  1  0.322  0.943  0.002  1.0
  Na  Na28  1  0.543  0.281  0.117  1.0
  Na  Na29  1  0.568  0.568  0.250  1.0
  Sn  Sn30  1  0.000  0.000  0.500  1.0
  Sn  Sn31  1  0.000  0.000  0.000  1.0
  Ge  Ge32  1  0.503  0.011  0.250  1.0
  Ge  Ge33  1  0.195  0.696  0.750  1.0
  Ge  Ge34  1  0.696  0.195  0.750  1.0
  Ge  Ge35  1  0.810  0.517  0.363  1.0
  Ge  Ge36  1  0.483  0.190  0.637  1.0
  Ge  Ge37  1  0.190  0.483  0.637  1.0
  Ge  Ge38  1  0.497  0.989  0.750  1.0
  Ge  Ge39  1  0.190  0.483  0.863  1.0
  Ge  Ge40  1  0.989  0.497  0.750  1.0
  Ge  Ge41  1  0.517  0.810  0.363  1.0
  Ge  Ge42  1  0.483  0.190  0.863  1.0
  Ge  Ge43  1  0.810  0.517  0.137  1.0
  Ge  Ge44  1  0.304  0.805  0.250  1.0
  Ge  Ge45  1  0.011  0.503  0.250  1.0
  Ge  Ge46  1  0.517  0.810  0.137  1.0
  Ge  Ge47  1  0.805  0.304  0.250  1.0
  P  P48  1  0.344  0.344  0.250  1.0
  P  P49  1  0.656  0.656  0.750  1.0
[/CIF]
.