data_global
_chemical_name_mineral 'Muscovite'
loop_
_publ_author_name
'Liang J'
'Hawthorne F C'
_journal_name_full 'The Canadian Mineralogist'
_journal_volume 34 
_journal_year 1996
_journal_page_first 115
_journal_page_last 122
_publ_section_title
;
 Rietveld refinement of micaceous materials: muscovite-2M1, a comparison
 with single-crystal structure refinement
 Sample: Rietveld refinement (reflection mode)
;
_database_code_amcsd 0005484
_chemical_formula_sum 'Al1.96 Si3.8 K.94 (O12 H2)'
_cell_length_a 5.1805
_cell_length_b 8.994
_cell_length_c 20.086
_cell_angle_alpha 90
_cell_angle_beta 95.740
_cell_angle_gamma 90
_cell_volume 931.183
_exptl_crystal_density_diffrn      2.785
_symmetry_space_group_name_H-M 'C 1 2/c 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  'x,-y,1/2+z'
  '1/2+x,1/2-y,1/2+z'
  '-x,y,1/2-z'
  '1/2-x,1/2+y,1/2-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
Al   0.24600   0.08100  -0.00120   0.98000
SiT1   0.44700   0.25600   0.13460   0.97000
SiT2   0.03200   0.42800   0.36420   0.93000
K   0.00000   0.10400   0.25000   0.94000
O-H   0.04500   0.06800   0.45260   1.00000
O1   0.37900   0.24600   0.05400   1.00000
O2   0.03500   0.44200   0.44830   1.00000
O3   0.41300   0.09000   0.16670   1.00000
O4   0.25700   0.37200   0.16910   1.00000
O5   0.24800   0.30700   0.34380   1.00000