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 = 525 deg C, from Panasqueira, Portugal
;
_database_code_amcsd 0001079
_chemical_formula_sum 'K Al2.908 Si3.092 O11.88 (F.12 H1.88)'
_cell_length_a 5.182
_cell_length_b 8.993
_cell_length_c 20.232
_cell_angle_alpha 90
_cell_angle_beta 95.75
_cell_angle_gamma 90
_cell_volume 938.102
_exptl_crystal_density_diffrn      2.823
_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   0.09830   0.25000   1.00000
Al   0.25120   0.08330   0.00013   1.00000
AlT1   0.46440   0.93000   0.13402   0.22700
SiT1   0.46440   0.93000   0.13402   0.77300
AlT2   0.45100   0.25890   0.13416   0.22700
SiT2   0.45100   0.25890   0.13416   0.77300
O1   0.42260   0.09330   0.16660   1.00000
O2   0.24510   0.81560   0.15630   1.00000
O3   0.24560   0.36640   0.16690   1.00000
O4   0.46170   0.94390   0.05310   1.00000
O5   0.38300   0.25220   0.05300   1.00000
O-H   0.45680   0.56220   0.04970   0.94000
F   0.45680   0.56220   0.04970   0.06000
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 0.04687 0.05203 0.04393 0.00000 0.00473 0.00000
Al 0.01199 0.01393 0.01745 -0.00117 0.00074 0.00101
AlT1 0.01266 0.01352 0.01622 -0.00070 0.00142 0.00128
SiT1 0.01266 0.01352 0.01622 -0.00070 0.00142 0.00128
AlT2 0.01387 0.01516 0.01642 -0.00070 0.00000 0.00055
SiT2 0.01387 0.01516 0.01642 -0.00070 0.00000 0.00055
O1 0.03771 0.02008 0.02484 0.00023 0.00736 -0.00092
O2 0.02424 0.03974 0.03079 -0.01010 -0.00210 0.00734
O3 0.02289 0.03319 0.02525 0.00987 -0.00315 -0.00459
O4 0.01347 0.02294 0.01991 0.00282 0.00158 0.00367
O5 0.02020 0.01598 0.01704 0.00211 -0.00105 0.00275
O-H 0.01481 0.02253 0.02299 -0.00399 0.00368 -0.00367
F 0.01481 0.02253 0.02299 -0.00399 0.00368 -0.00367