data_global
_chemical_name_mineral 'Muscovite'
loop_
_publ_author_name
'Guven N'
_journal_name_full 'Zeitschrift fur Kristallographie'
_journal_volume 134 
_journal_year 1971
_journal_page_first 196
_journal_page_last 212
_publ_section_title
;
 The crystal structures of 2M1 phengite and 2M1 muscovite
 Note: sample 2M1 phengite
;
_database_code_amcsd 0019601
_chemical_compound_source 'Tiburon Peninsula, California, USA'
_chemical_formula_sum 'K.87 Na.07 Ba.01 Ca.02 Al2.038 Mg.5 Ti.01 Fe.14 Si3.392 O12 H2'
_cell_length_a 5.2112
_cell_length_b 9.0383
_cell_length_c 19.9473
_cell_angle_alpha 90
_cell_angle_beta 95.769
_cell_angle_gamma 90
_cell_volume 934.767
_exptl_crystal_density_diffrn      2.860
_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
K   0.00000   0.09640   0.25000   0.87000   0.02229
Na   0.00000   0.09640   0.25000   0.07000   0.02229
Ba   0.00000   0.09640   0.25000   0.01000   0.02229
Ca   0.00000   0.09640   0.25000   0.02000   0.02229
Al   0.24670   0.08250   0.00010   0.71500   0.00937
Mg   0.24670   0.08250   0.00010   0.25000   0.00937
Ti   0.24670   0.08250   0.00010   0.00500   0.00937
Fe   0.24670   0.08250   0.00010   0.07000   0.00937
AlT1   0.96320   0.42970   0.13550   0.15200   0.00760
SiT1   0.96320   0.42970   0.13550   0.84800   0.00760
AlT2   0.45250   0.25810   0.13540   0.15200   0.00760
SiT2   0.45250   0.25810   0.13540   0.84800   0.00760
Oa   0.95680   0.43960   0.05440   1.00000   0.01305
Ob   0.39330   0.24960   0.05370   1.00000   0.01355
Oc   0.44260   0.09310   0.16780   1.00000   0.01646
Od   0.73720   0.32570   0.16010   1.00000   0.01786
Oe   0.23260   0.35740   0.16820   1.00000   0.01558
O-H   0.95310   0.06560   0.05260   1.00000   0.01532