data_global
_chemical_name_mineral 'Sanidine-Ge'
loop_
_publ_author_name
'Kroll H'
'Flogel J'
'Breit U'
'Lons J'
'Pentinghaus H'
_journal_name_full 'European Journal of Mineralogy'
_journal_volume 3 
_journal_year 1991
_journal_page_first 739
_journal_page_last 749
_publ_section_title
;
 Order and anti-order in Ge-substituted alkali feldspars
 Sample: K[AlGe3O8] synthesized at 600 deg C
;
_database_code_amcsd 0006421
_chemical_formula_sum 'K (Al Ge3) O8'
_cell_length_a 8.8163
_cell_length_b 13.5536
_cell_length_c 7.4577
_cell_angle_alpha 90
_cell_angle_beta 115.898
_cell_angle_gamma 90
_cell_volume 801.646
_exptl_crystal_density_diffrn      3.413
_symmetry_space_group_name_H-M 'C 1 2/m 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  'x,-y,z'
  '1/2+x,1/2-y,z'
  '-x,y,-z'
  '1/2-x,1/2+y,-z'
  '-x,-y,-z'
  '1/2-x,1/2-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
K   0.27760   0.00000   0.13540   1.00000   0.02964
AlT1   0.00661   0.18313   0.22294   0.28400   0.01039
GeT1   0.00661   0.18313   0.22294   0.71600   0.01039
AlT2   0.70244   0.11766   0.34424   0.21600   0.01026
GeT2   0.70244   0.11766   0.34424   0.78400   0.01026
OA1   0.00000   0.14080   0.00000   1.00000   0.01786
OA2   0.61560   0.00000   0.28350   1.00000   0.01532
OB   0.81910   0.14060   0.21430   1.00000   0.02647
OC   0.02200   0.30940   0.25710   1.00000   0.01925
OD   0.18260   0.12430   0.40040   1.00000   0.02394