data_global
_chemical_name_mineral 'Muscovite'
loop_
_publ_author_name
'Guggenheim S'
'Chang Y H'
'Koster van Groos A F'
_journal_name_full 'American Mineralogist'
_journal_volume 72 
_journal_year 1987
_journal_page_first 537
_journal_page_last 550
_publ_section_title
;
 Muscovite dehydroxylation: High-temperature studies
 Sample: T = 300 deg C, from Diamond mine, Keystone, South Dakota
;
_database_code_amcsd 0001077
_chemical_formula_sum '(K.93 Na.07) Al2.73 Fe.16 Si3.1 O11.83 (F.17 H1.83)'
_cell_length_a 5.215
_cell_length_b 9.053
_cell_length_c 20.15
_cell_angle_alpha 90
_cell_angle_beta 95.72
_cell_angle_gamma 90
_cell_volume 946.573
_exptl_crystal_density_diffrn      2.821
_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
K   0.00000   0.09820   0.25000   0.93000
Na   0.00000   0.09820   0.25000   0.07000
Al   0.25110   0.08350   0.00000   0.91500
Fe   0.25110   0.08350   0.00000   0.08000
AlT1   0.46450   0.92970   0.13510   0.22500
SiT1   0.46450   0.92970   0.13510   0.77500
AlT2   0.45140   0.25840   0.13540   0.22500
SiT2   0.45140   0.25840   0.13540   0.77500
O1   0.42300   0.09390   0.16840   1.00000
O2   0.24700   0.81270   0.15700   1.00000
O3   0.24800   0.36750   0.16820   1.00000
O4   0.46100   0.94390   0.05400   1.00000
O5   0.38400   0.25170   0.05300   1.00000
O-H   0.45500   0.56240   0.05050   0.91500
F   0.45500   0.56240   0.05050   0.08500
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
K 0.03274 0.03737 0.03462 0.00000 0.00474 0.00000
Na 0.03274 0.03737 0.03462 0.00000 0.00474 0.00000
Al 0.00982 0.01204 0.01426 -0.00190 0.00264 0.00184
Fe 0.00982 0.01204 0.01426 -0.00190 0.00264 0.00184
AlT1 0.00791 0.01038 0.01426 0.00000 0.00264 0.00000
SiT1 0.00791 0.01038 0.01426 0.00000 0.00264 0.00000
AlT2 0.00805 0.01038 0.01426 0.00000 0.00211 0.00000
SiT2 0.00805 0.01038 0.01426 0.00000 0.00211 0.00000
O1 0.02183 0.01868 0.01629 -0.00238 0.00053 0.00276
O2 0.01773 0.02657 0.02851 -0.00714 -0.00105 0.00644
O3 0.02046 0.02034 0.02851 0.00714 0.00369 0.00000
O4 0.01228 0.01744 0.01629 0.00000 0.00580 0.00368
O5 0.01364 0.01868 0.01222 0.00238 0.00158 0.00460
O-H 0.01364 0.01744 0.02240 0.00000 0.00527 -0.00276
F 0.01364 0.01744 0.02240 0.00000 0.00527 -0.00276