data_global
_chemical_name_mineral 'Mullite'
loop_
_publ_author_name
'Voll D'
'Lengauer C'
'Beran A'
'Schneider H'
_journal_name_full 'European Journal of Mineralogy'
_journal_volume 13 
_journal_year 2001
_journal_page_first 591
_journal_page_last 604
_publ_section_title
;
 Infrared band assignment and structural refinement of
 Al-Si, Al-Ge, and Ga-Ge mullites
 Sample: Ga-Ge powder data
;
_database_code_amcsd 0006891
_chemical_formula_sum 'Ga2.31 Ge.69 O4.84'
_cell_length_a 7.8674
_cell_length_b 8.0305
_cell_length_c 3.0148
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 190.473
_exptl_crystal_density_diffrn      5.032
_symmetry_space_group_name_H-M 'P b a m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2-y,z'
  '1/2-x,1/2+y,-z'
  '1/2-x,1/2+y,z'
  '1/2+x,1/2-y,-z'
  'x,y,-z'
  '-x,-y,z'
  '-x,-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
GaM   0.00000   0.00000   0.00000   1.00000   0.01077
GaT   0.14980   0.34090   0.50000   0.50000   0.01089
GeT   0.14980   0.34090   0.50000   0.34500   0.01089
GaT*   0.26760   0.21230   0.50000   0.15500   0.01520
Od   0.13000   0.21630   0.00000   1.00000   0.01773
Oab   0.36450   0.42330   0.50000   1.00000   0.01520
Oc   0.50000   0.00000   0.50000   0.54000   0.03293
Oc*   0.44100   0.04900   0.50000   0.15000   0.04179