data_global
loop_
_publ_author_name
'Glinnemann, J.'
'King, H. E.'
'Schulz, H.'
'Hahn, T.'
'La Placa, S. J.'
'Dacol, F.'
_publ_section_title
;Crystal structures of the low-temperature quartz-type phases of SiO2 and GeO2 at elevated pressure

 P = 10.2GPa = 102 kbar
;
_journal_name_full               'Zeitschrift fur Kristallographie'
_journal_page_first              177
_journal_page_last               212
_journal_volume                  198
_journal_year                    1992
_chemical_formula_sum            'Si O2'
_symmetry_space_group_name_H-M   'P 31 2 1'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                120
_cell_length_a                   4.604
_cell_length_b                   4.604
_cell_length_c                   5.207
_cell_volume                     95.585
#BEGIN Tags that were not found in dictionaries:
_chemical_name                   Quartz
#END Tags that were not found in dictionaries
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
y,x,1/3-z
-y,x-y,1/3+z
-x,-x+y,2/3-z
-x+y,-x,2/3+z
x-y,-y,-z
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Si 0.44580 0.00000 0.00000
O 0.39510 0.30310 -0.09210
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Si 0.00520 0.00390 0.00480 0.00195 0.00030 0.00060
O 0.01060 0.00720 0.00760 0.00610 0.00170 0.00200
