data_global
_chemical_name_mineral 'Muscovite'
loop_
_publ_author_name
'Comodi P'
'Zanazzi P F'
_journal_name_full 'Physics and Chemistry of Minerals'
_journal_volume 22 
_journal_year 1995
_journal_page_first 170
_journal_page_last 177
_publ_section_title
;
 High-pressure structural study of muscovite
 Sample: Na-Ms, P = 0.0001 GPa, in air
;
_database_code_amcsd 0007910
_chemical_formula_sum 'K.6 Na.37 Al2.8 Ti.02 Fe.1 Mg.04 Si3.04 O12 H2'
_cell_length_a 5.165
_cell_length_b 8.964
_cell_length_c 19.798
_cell_angle_alpha 90
_cell_angle_beta 95.4
_cell_angle_gamma 90
_cell_volume 912.561
_exptl_crystal_density_diffrn      2.871
_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   0.09760   0.25000   0.60000   0.03060
Na   0.00000   0.09760   0.25000   0.37000   0.03060
AlM2   0.24950   0.08320   0.00000   0.92000   0.01020
TiM2   0.24950   0.08320   0.00000   0.01000   0.01020
FeM2   0.24950   0.08320   0.00000   0.05000   0.01020
MgM2   0.24950   0.08320   0.00000   0.02000   0.01020
SiT1   0.96330   0.42910   0.13730   0.76000   0.01400
AlT1   0.96330   0.42910   0.13730   0.24000   0.01400
SiT2   0.45020   0.25810   0.13720   0.76000   0.01370
AlT2   0.45020   0.25810   0.13720   0.24000   0.01370
O1   0.96140   0.44410   0.05440   1.00000   0.01550
O2   0.38390   0.25090   0.05430   1.00000   0.01520
O3   0.40460   0.09250   0.17060   1.00000   0.01940
O4   0.75310   0.30540   0.15930   1.00000   0.02230
O5   0.25320   0.37420   0.17090   1.00000   0.01860
O-H   0.95670   0.06200   0.05060   1.00000   0.01550