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: single-crystal refinement
;
_database_code_amcsd 0005485
_chemical_formula_sum 'Al1.93 Si3.772 K.894 (O12 H2)'
_cell_length_a 5.180
_cell_length_b 8.993
_cell_length_c 20.069
_cell_angle_alpha 90
_cell_angle_beta 95.69
_cell_angle_gamma 90
_cell_volume 930.283
_exptl_crystal_density_diffrn      2.763
_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
_atom_site_U_iso_or_equiv
Al   0.25100   0.08380   0.00000   0.96500   0.00710
SiT1   0.45140   0.25820   0.13550   0.94400   0.00810
SiT2   0.03450   0.42950   0.36460   0.94200   0.00780
K   0.00000   0.09860   0.25000   0.89400   0.02260
O-H   0.04290   0.06170   0.45010   1.00000   0.01350
O1   0.38360   0.25110   0.05360   1.00000   0.01360
O2   0.03800   0.44470   0.44630   1.00000   0.01340
O3   0.41280   0.09250   0.16820   1.00000   0.01890
O4   0.25160   0.37260   0.16880   1.00000   0.01890
O5   0.24690   0.30830   0.34260   1.00000   0.02080