data_9011056
_publ_section_title
;
 The crystal structures of new forms of silicon and germanium
 Locality: synthetic
;
_journal_name_full               'Acta Crystallographica'
_journal_page_first              752
_journal_page_last               755
_journal_paper_doi               10.1107/S0365110X64001840
_journal_volume                  17
_journal_year                    1964
_chemical_formula_sum            Si
_chemical_name_mineral           Silicon
_space_group_IT_number           206
_symmetry_space_group_name_Hall  '-I 2b 2c 3'
_symmetry_space_group_name_H-M   'I a -3'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_length_a                   6.636
_cell_length_b                   6.636
_cell_length_c                   6.636
_cell_volume                     292.226
_exptl_crystal_density_diffrn    2.553
_[local]_cod_cif_authors_sg_H-M  'I a 3'
_cod_database_code               9011056
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
1/2+x,1/2+y,1/2+z
1/2+z,x,1/2-y
+z,1/2+x,-y
1/2+z,-x,y
+z,1/2-x,1/2+y
-z,x,1/2+y
1/2-z,1/2+x,+y
-z,-x,-y
1/2-z,1/2-x,1/2-y
1/2+y,1/2-z,-x
+y,-z,1/2-x
-y,1/2-z,x
1/2-y,-z,1/2+x
1/2-y,z,-x
-y,1/2+z,1/2-x
y,z,x
1/2+y,1/2+z,1/2+x
x,1/2-y,1/2+z
1/2+x,-y,+z
-x,y,1/2+z
1/2-x,1/2+y,+z
x,1/2+y,-z
1/2+x,+y,1/2-z
-x,-y,-z
1/2-x,1/2-y,1/2-z
1/2-z,-x,1/2+y
-z,1/2-x,+y
1/2-z,x,-y
-z,1/2+x,1/2-y
z,-x,1/2-y
1/2+z,1/2-x,-y
z,x,y
1/2+z,1/2+x,1/2+y
1/2-y,1/2+z,x
-y,+z,1/2+x
y,1/2+z,-x
1/2+y,+z,1/2-x
1/2+y,-z,x
+y,1/2-z,1/2+x
-y,-z,-x
1/2-y,1/2-z,1/2-x
-x,1/2+y,1/2-z
1/2-x,+y,-z
x,-y,1/2-z
1/2+x,1/2-y,-z
-x,1/2-y,z
1/2-x,-y,1/2+z
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
Si 0.10030 0.10030 0.10030 0.01127
