The crystal structure described by Si(PH2)4 is Indium-like structured and crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four silanetetrayltetrakis(phosphane) molecules. Si(1) is bonded in a tetrahedral geometry to one P(1), one P(2), one P(3), and one P(4) atom. There are four inequivalent P sites. In the first P site, P(1) is bonded in a distorted T-shaped geometry to one Si(1); one H(1,6); and one H(7) atom. In the second P site, P(2) is bonded in a distorted T-shaped geometry to one Si(1); one H(1,6); and one H(2) atom. In the third P site, P(3) is bonded in a distorted T-shaped geometry to one Si(1); one H(3,8); and one H(4) atom. In the fourth P site, P(4) is bonded in a distorted T-shaped geometry to one Si(1); one H(3,8); and one H(5) atom. There are six inequivalent H sites. In the first H site, H(4) is bonded in a single-bond geometry to one P(3) atom. In the second H site, H(5) is bonded in a single-bond geometry to one P(4) atom. In the third H site, H(7) is bonded in a single-bond geometry to one P(1) atom. In the fourth H site, H(1,6) is bonded in a single-bond geometry to one P(2) atom. In the fifth H site, H(2) is bonded in a single-bond geometry to one P(2) atom. In the sixth H site, H(3,8) is bonded in a single-bond geometry to one P(3) atom. is represented by the CIF card [CIF]
data_Si(PH2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.444
_cell_length_b   10.876
_cell_length_c   11.119
_cell_angle_alpha   78.549
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   882.350
_cell_formula_units_Z   4
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
  Si  Si0  1  0.935  0.756  0.354  1.0
  Si  Si1  1  0.435  0.244  0.146  1.0
  Si  Si2  1  0.065  0.244  0.646  1.0
  Si  Si3  1  0.565  0.756  0.854  1.0
  P  P4  1  0.853  0.703  0.904  1.0
  P  P5  1  0.353  0.297  0.596  1.0
  P  P6  1  0.147  0.297  0.096  1.0
  P  P7  1  0.647  0.703  0.404  1.0
  P  P8  1  0.063  0.809  0.520  1.0
  P  P9  1  0.563  0.191  0.980  1.0
  P  P10  1  0.937  0.191  0.480  1.0
  P  P11  1  0.437  0.809  0.020  1.0
  P  P12  1  0.543  0.923  0.698  1.0
  P  P13  1  0.043  0.077  0.802  1.0
  P  P14  1  0.457  0.077  0.302  1.0
  P  P15  1  0.957  0.923  0.198  1.0
  P  P16  1  0.079  0.589  0.306  1.0
  P  P17  1  0.579  0.411  0.194  1.0
  P  P18  1  0.921  0.411  0.694  1.0
  P  P19  1  0.421  0.589  0.806  1.0
  H  H20  1  0.260  0.812  0.972  1.0
  H  H21  1  0.760  0.188  0.528  1.0
  H  H22  1  0.740  0.188  0.028  1.0
  H  H23  1  0.240  0.812  0.472  1.0
  H  H24  1  0.424  0.682  0.082  1.0
  H  H25  1  0.924  0.318  0.418  1.0
  H  H26  1  0.576  0.318  0.918  1.0
  H  H27  1  0.076  0.682  0.582  1.0
  H  H28  1  0.833  0.997  0.249  1.0
  H  H29  1  0.333  0.003  0.251  1.0
  H  H30  1  0.167  0.003  0.751  1.0
  H  H31  1  0.667  0.997  0.749  1.0
  H  H32  1  0.826  0.877  0.125  1.0
  H  H33  1  0.326  0.123  0.375  1.0
  H  H34  1  0.174  0.123  0.875  1.0
  H  H35  1  0.674  0.877  0.625  1.0
  H  H36  1  0.495  0.604  0.686  1.0
  H  H37  1  0.995  0.396  0.814  1.0
  H  H38  1  0.505  0.396  0.314  1.0
  H  H39  1  0.005  0.604  0.186  1.0
  H  H40  1  0.690  0.581  0.469  1.0
  H  H41  1  0.190  0.419  0.031  1.0
  H  H42  1  0.310  0.419  0.531  1.0
  H  H43  1  0.810  0.581  0.969  1.0
  H  H44  1  0.612  0.663  0.292  1.0
  H  H45  1  0.112  0.337  0.208  1.0
  H  H46  1  0.388  0.337  0.708  1.0
  H  H47  1  0.888  0.663  0.792  1.0
  H  H48  1  0.262  0.657  0.765  1.0
  H  H49  1  0.762  0.343  0.735  1.0
  H  H50  1  0.738  0.343  0.235  1.0
  H  H51  1  0.238  0.657  0.265  1.0
[/CIF]
.
The crystal structure described by Si(PH2)4 is Indium-like structured and crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four silanetetrayltetrakis(phosphane) molecules. Si(1) is bonded in a tetrahedral geometry to one P(1), one P(2), one P(3), and one P(4) atom. There are four inequivalent P sites. In the first P site, P(1) is bonded in a distorted T-shaped geometry to one Si(1); one H(1,6); and one H(7) atom. In the second P site, P(2) is bonded in a distorted T-shaped geometry to one Si(1); one H(1,6); and one H(2) atom. In the third P site, P(3) is bonded in a distorted T-shaped geometry to one Si(1); one H(3,8); and one H(4) atom. In the fourth P site, P(4) is bonded in a distorted T-shaped geometry to one Si(1); one H(3,8); and one H(5) atom. There are six inequivalent H sites. In the first H site, H(4) is bonded in a single-bond geometry to one P(3) atom. In the second H site, H(5) is bonded in a single-bond geometry to one P(4) atom. In the third H site, H(7) is bonded in a single-bond geometry to one P(1) atom. In the fourth H site, H(1,6) is bonded in a single-bond geometry to one P(2) atom. In the fifth H site, H(2) is bonded in a single-bond geometry to one P(2) atom. In the sixth H site, H(3,8) is bonded in a single-bond geometry to one P(3) atom. is represented by the CIF card [CIF]
data_Si(PH2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.444
_cell_length_b   10.876
_cell_length_c   11.119
_cell_angle_alpha   78.549
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   882.350
_cell_formula_units_Z   4
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
  Si  Si0  1  0.935  0.756  0.354  1.0
  Si  Si1  1  0.435  0.244  0.146  1.0
  Si  Si2  1  0.065  0.244  0.646  1.0
  Si  Si3  1  0.565  0.756  0.854  1.0
  P  P4  1  0.853  0.703  0.904  1.0
  P  P5  1  0.353  0.297  0.596  1.0
  P  P6  1  0.147  0.297  0.096  1.0
  P  P7  1  0.647  0.703  0.404  1.0
  P  P8  1  0.063  0.809  0.520  1.0
  P  P9  1  0.563  0.191  0.980  1.0
  P  P10  1  0.937  0.191  0.480  1.0
  P  P11  1  0.437  0.809  0.020  1.0
  P  P12  1  0.543  0.923  0.698  1.0
  P  P13  1  0.043  0.077  0.802  1.0
  P  P14  1  0.457  0.077  0.302  1.0
  P  P15  1  0.957  0.923  0.198  1.0
  P  P16  1  0.079  0.589  0.306  1.0
  P  P17  1  0.579  0.411  0.194  1.0
  P  P18  1  0.921  0.411  0.694  1.0
  P  P19  1  0.421  0.589  0.806  1.0
  H  H20  1  0.260  0.812  0.972  1.0
  H  H21  1  0.760  0.188  0.528  1.0
  H  H22  1  0.740  0.188  0.028  1.0
  H  H23  1  0.240  0.812  0.472  1.0
  H  H24  1  0.424  0.682  0.082  1.0
  H  H25  1  0.924  0.318  0.418  1.0
  H  H26  1  0.576  0.318  0.918  1.0
  H  H27  1  0.076  0.682  0.582  1.0
  H  H28  1  0.833  0.997  0.249  1.0
  H  H29  1  0.333  0.003  0.251  1.0
  H  H30  1  0.167  0.003  0.751  1.0
  H  H31  1  0.667  0.997  0.749  1.0
  H  H32  1  0.826  0.877  0.125  1.0
  H  H33  1  0.326  0.123  0.375  1.0
  H  H34  1  0.174  0.123  0.875  1.0
  H  H35  1  0.674  0.877  0.625  1.0
  H  H36  1  0.495  0.604  0.686  1.0
  H  H37  1  0.995  0.396  0.814  1.0
  H  H38  1  0.505  0.396  0.314  1.0
  H  H39  1  0.005  0.604  0.186  1.0
  H  H40  1  0.690  0.581  0.469  1.0
  H  H41  1  0.190  0.419  0.031  1.0
  H  H42  1  0.310  0.419  0.531  1.0
  H  H43  1  0.810  0.581  0.969  1.0
  H  H44  1  0.612  0.663  0.292  1.0
  H  H45  1  0.112  0.337  0.208  1.0
  H  H46  1  0.388  0.337  0.708  1.0
  H  H47  1  0.888  0.663  0.792  1.0
  H  H48  1  0.262  0.657  0.765  1.0
  H  H49  1  0.762  0.343  0.735  1.0
  H  H50  1  0.738  0.343  0.235  1.0
  H  H51  1  0.238  0.657  0.265  1.0
[/CIF]
.