The structure described by BaP10 crystallizes in the orthorhombic Cmc2_1 space group. Ba(1) is bonded in a 12-coordinate geometry to one P(2), one P(3), one P(5), one P(6), two equivalent P(1), two equivalent P(4), two equivalent P(7), and two equivalent P(8) atoms. There are eight inequivalent P sites. In the first P site, P(1) is bonded to two equivalent Ba(1), one P(3), and one P(6) atom to form PBa2P2 tetrahedra that share corners with two equivalent P(1)Ba2P2 tetrahedra, corners with two equivalent P(2)BaP3 tetrahedra, corners with two equivalent P(5)BaP3 tetrahedra, corners with two equivalent P(6)BaP3 tetrahedra, corners with six equivalent P(8)BaP3 tetrahedra, corners with two equivalent P(4)Ba2P2 trigonal pyramids, corners with six equivalent P(7)BaP3 trigonal pyramids, and  an edgeedge with one P(4)Ba2P2 trigonal pyramid. In the second P site, P(2) is bonded to one Ba(1), one P(4), and two equivalent P(7) atoms to form PBaP3 tetrahedra that share corners with two equivalent P(1)Ba2P2 tetrahedra, corners with two equivalent P(5)BaP3 tetrahedra, corners with three equivalent P(6)BaP3 tetrahedra, corners with four equivalent P(8)BaP3 tetrahedra, corners with two equivalent P(4)Ba2P2 trigonal pyramids, and corners with two equivalent P(7)BaP3 trigonal pyramids. In the third P site, P(3) is bonded in a distorted trigonal non-coplanar geometry to one Ba(1), one P(1), and two equivalent P(8) atoms. In the fourth P site, P(4) is bonded to two equivalent Ba(1), one P(2), and one P(5) atom to form distorted PBa2P2 trigonal pyramids that share corners with two equivalent P(1)Ba2P2 tetrahedra, corners with two equivalent P(2)BaP3 tetrahedra, corners with two equivalent P(5)BaP3 tetrahedra, corners with two equivalent P(6)BaP3 tetrahedra, corners with six equivalent P(8)BaP3 tetrahedra, corners with two equivalent P(4)Ba2P2 trigonal pyramids, corners with two equivalent P(7)BaP3 trigonal pyramids,  an edgeedge with one P(1)Ba2P2 tetrahedra, and edges with two equivalent P(7)BaP3 trigonal pyramids. In the fifth P site, P(5) is bonded to one Ba(1), one P(4), and two equivalent P(8) atoms to form PBaP3 tetrahedra that share  a cornercorner with one P(6)BaP3 tetrahedra, corners with two equivalent P(1)Ba2P2 tetrahedra, corners with two equivalent P(2)BaP3 tetrahedra, corners with two equivalent P(8)BaP3 tetrahedra, corners with two equivalent P(4)Ba2P2 trigonal pyramids, and corners with four equivalent P(7)BaP3 trigonal pyramids. In the sixth P site, P(6) is bonded to one Ba(1), one P(1), and two equivalent P(7) atoms to form distorted PBaP3 tetrahedra that share  a cornercorner with one P(5)BaP3 tetrahedra, corners with two equivalent P(1)Ba2P2 tetrahedra, corners with three equivalent P(2)BaP3 tetrahedra, corners with four equivalent P(8)BaP3 tetrahedra, corners with two equivalent P(4)Ba2P2 trigonal pyramids, and corners with two equivalent P(7)BaP3 trigonal pyramids. In the seventh P site, P(7) is bonded to one Ba(1), one P(2), one P(6), and one P(8) atom to form distorted PBaP3 trigonal pyramids that share  a cornercorner with one P(2)BaP3 tetrahedra,  a cornercorner with one P(6)BaP3 tetrahedra, corners with two equivalent P(5)BaP3 tetrahedra, corners with two equivalent P(8)BaP3 tetrahedra, corners with three equivalent P(1)Ba2P2 tetrahedra,  a cornercorner with one P(4)Ba2P2 trigonal pyramid,  a cornercorner with one P(7)BaP3 trigonal pyramid,  an edgeedge with one P(4)Ba2P2 trigonal pyramid, and  an edgeedge with one P(7)BaP3 trigonal pyramid. In the eighth P site, P(8) is bonded to one Ba(1), one P(3), one P(5), and one P(7) atom to form PBaP3 tetrahedra that share  a cornercorner with one P(5)BaP3 tetrahedra,  a cornercorner with one P(8)BaP3 tetrahedra, corners with two equivalent P(2)BaP3 tetrahedra, corners with two equivalent P(6)BaP3 tetrahedra, corners with three equivalent P(1)Ba2P2 tetrahedra, corners with two equivalent P(7)BaP3 trigonal pyramids, corners with three equivalent P(4)Ba2P2 trigonal pyramids, and  an edgeedge with one P(8)BaP3 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_BaP10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.480
_cell_length_b   7.222
_cell_length_c   12.125
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   116.656
_symmetry_Int_Tables_number   1
_cell_volume   507.078
_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
  Ba  Ba0  1  0.187  0.375  0.006  1.0
  Ba  Ba1  1  0.813  0.625  0.506  1.0
  P  P2  1  0.390  0.781  0.606  1.0
  P  P3  1  0.610  0.219  0.106  1.0
  P  P4  1  0.067  0.135  0.558  1.0
  P  P5  1  0.933  0.865  0.058  1.0
  P  P6  1  0.409  0.817  0.782  1.0
  P  P7  1  0.591  0.183  0.282  1.0
  P  P8  1  0.813  0.627  0.929  1.0
  P  P9  1  0.187  0.373  0.429  1.0
  P  P10  1  0.909  0.818  0.781  1.0
  P  P11  1  0.091  0.182  0.281  1.0
  P  P12  1  0.552  0.104  0.566  1.0
  P  P13  1  0.448  0.896  0.066  1.0
  P  P14  1  0.869  0.247  0.665  1.0
  P  P15  1  0.131  0.753  0.165  1.0
  P  P16  1  0.378  0.247  0.665  1.0
  P  P17  1  0.622  0.753  0.165  1.0
  P  P18  1  0.772  0.043  0.815  1.0
  P  P19  1  0.228  0.957  0.315  1.0
  P  P20  1  0.271  0.043  0.815  1.0
  P  P21  1  0.729  0.957  0.315  1.0
[/CIF]
.
The structure described by BaP10 crystallizes in the orthorhombic Cmc2_1 space group. Ba(1) is bonded in a 12-coordinate geometry to one P(2), one P(3), one P(5), one P(6), two equivalent P(1), two equivalent P(4), two equivalent P(7), and two equivalent P(8) atoms. There are eight inequivalent P sites. In the first P site, P(1) is bonded to two equivalent Ba(1), one P(3), and one P(6) atom to form PBa2P2 tetrahedra that share corners with two equivalent P(1)Ba2P2 tetrahedra, corners with two equivalent P(2)BaP3 tetrahedra, corners with two equivalent P(5)BaP3 tetrahedra, corners with two equivalent P(6)BaP3 tetrahedra, corners with six equivalent P(8)BaP3 tetrahedra, corners with two equivalent P(4)Ba2P2 trigonal pyramids, corners with six equivalent P(7)BaP3 trigonal pyramids, and  an edgeedge with one P(4)Ba2P2 trigonal pyramid. In the second P site, P(2) is bonded to one Ba(1), one P(4), and two equivalent P(7) atoms to form PBaP3 tetrahedra that share corners with two equivalent P(1)Ba2P2 tetrahedra, corners with two equivalent P(5)BaP3 tetrahedra, corners with three equivalent P(6)BaP3 tetrahedra, corners with four equivalent P(8)BaP3 tetrahedra, corners with two equivalent P(4)Ba2P2 trigonal pyramids, and corners with two equivalent P(7)BaP3 trigonal pyramids. In the third P site, P(3) is bonded in a distorted trigonal non-coplanar geometry to one Ba(1), one P(1), and two equivalent P(8) atoms. In the fourth P site, P(4) is bonded to two equivalent Ba(1), one P(2), and one P(5) atom to form distorted PBa2P2 trigonal pyramids that share corners with two equivalent P(1)Ba2P2 tetrahedra, corners with two equivalent P(2)BaP3 tetrahedra, corners with two equivalent P(5)BaP3 tetrahedra, corners with two equivalent P(6)BaP3 tetrahedra, corners with six equivalent P(8)BaP3 tetrahedra, corners with two equivalent P(4)Ba2P2 trigonal pyramids, corners with two equivalent P(7)BaP3 trigonal pyramids,  an edgeedge with one P(1)Ba2P2 tetrahedra, and edges with two equivalent P(7)BaP3 trigonal pyramids. In the fifth P site, P(5) is bonded to one Ba(1), one P(4), and two equivalent P(8) atoms to form PBaP3 tetrahedra that share  a cornercorner with one P(6)BaP3 tetrahedra, corners with two equivalent P(1)Ba2P2 tetrahedra, corners with two equivalent P(2)BaP3 tetrahedra, corners with two equivalent P(8)BaP3 tetrahedra, corners with two equivalent P(4)Ba2P2 trigonal pyramids, and corners with four equivalent P(7)BaP3 trigonal pyramids. In the sixth P site, P(6) is bonded to one Ba(1), one P(1), and two equivalent P(7) atoms to form distorted PBaP3 tetrahedra that share  a cornercorner with one P(5)BaP3 tetrahedra, corners with two equivalent P(1)Ba2P2 tetrahedra, corners with three equivalent P(2)BaP3 tetrahedra, corners with four equivalent P(8)BaP3 tetrahedra, corners with two equivalent P(4)Ba2P2 trigonal pyramids, and corners with two equivalent P(7)BaP3 trigonal pyramids. In the seventh P site, P(7) is bonded to one Ba(1), one P(2), one P(6), and one P(8) atom to form distorted PBaP3 trigonal pyramids that share  a cornercorner with one P(2)BaP3 tetrahedra,  a cornercorner with one P(6)BaP3 tetrahedra, corners with two equivalent P(5)BaP3 tetrahedra, corners with two equivalent P(8)BaP3 tetrahedra, corners with three equivalent P(1)Ba2P2 tetrahedra,  a cornercorner with one P(4)Ba2P2 trigonal pyramid,  a cornercorner with one P(7)BaP3 trigonal pyramid,  an edgeedge with one P(4)Ba2P2 trigonal pyramid, and  an edgeedge with one P(7)BaP3 trigonal pyramid. In the eighth P site, P(8) is bonded to one Ba(1), one P(3), one P(5), and one P(7) atom to form PBaP3 tetrahedra that share  a cornercorner with one P(5)BaP3 tetrahedra,  a cornercorner with one P(8)BaP3 tetrahedra, corners with two equivalent P(2)BaP3 tetrahedra, corners with two equivalent P(6)BaP3 tetrahedra, corners with three equivalent P(1)Ba2P2 tetrahedra, corners with two equivalent P(7)BaP3 trigonal pyramids, corners with three equivalent P(4)Ba2P2 trigonal pyramids, and  an edgeedge with one P(8)BaP3 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_BaP10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.480
_cell_length_b   7.222
_cell_length_c   12.125
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   116.656
_symmetry_Int_Tables_number   1
_cell_volume   507.078
_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
  Ba  Ba0  1  0.187  0.375  0.006  1.0
  Ba  Ba1  1  0.813  0.625  0.506  1.0
  P  P2  1  0.390  0.781  0.606  1.0
  P  P3  1  0.610  0.219  0.106  1.0
  P  P4  1  0.067  0.135  0.558  1.0
  P  P5  1  0.933  0.865  0.058  1.0
  P  P6  1  0.409  0.817  0.782  1.0
  P  P7  1  0.591  0.183  0.282  1.0
  P  P8  1  0.813  0.627  0.929  1.0
  P  P9  1  0.187  0.373  0.429  1.0
  P  P10  1  0.909  0.818  0.781  1.0
  P  P11  1  0.091  0.182  0.281  1.0
  P  P12  1  0.552  0.104  0.566  1.0
  P  P13  1  0.448  0.896  0.066  1.0
  P  P14  1  0.869  0.247  0.665  1.0
  P  P15  1  0.131  0.753  0.165  1.0
  P  P16  1  0.378  0.247  0.665  1.0
  P  P17  1  0.622  0.753  0.165  1.0
  P  P18  1  0.772  0.043  0.815  1.0
  P  P19  1  0.228  0.957  0.315  1.0
  P  P20  1  0.271  0.043  0.815  1.0
  P  P21  1  0.729  0.957  0.315  1.0
[/CIF]
.