data_global
_chemical_name_mineral 'Pertoldite'
loop_
_publ_author_name
'Yamanaka T'
'Ogata K'
_journal_name_full 'Journal of Applied Crystallography'
_journal_volume 24 
_journal_year 1991
_journal_page_first 111
_journal_page_last 118
_publ_section_title
;
 Structure refinement of GeO2 polymorphs at high pressures and
 temperatures by energy-dispersive spectra of powder diffraction
 Note: P = 2.9 GPa T = 493 K
;
_database_code_amcsd 0019060
_chemical_compound_source 'Synthetic'
_chemical_formula_sum 'Ge O2'
_cell_length_a 4.9097
_cell_length_b 4.9097
_cell_length_c 5.6249
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 117.424
_exptl_crystal_density_diffrn      4.438
_symmetry_space_group_name_H-M 'P 32 2 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'y,x,2/3-z'
  '-y,x-y,2/3+z'
  '-x,-x+y,1/3-z'
  '-x+y,-x,1/3+z'
  'x-y,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
Ge   0.45010   0.00000   0.00000   0.01140
O   0.39120   0.30430   0.08810   0.01646