data_global
_chemical_name_mineral 'Muscovite-2M1'
loop_
_publ_author_name
'Brigatti M F'
'Frigieri P'
'Poppi L'
_journal_name_full 'American Mineralogist'
_journal_volume 83 
_journal_year 1998
_journal_page_first 775
_journal_page_last 785
_publ_section_title
;
 Crystal chemistry of Mg-, Fe-bearing muscovites-2M1
 Sample CC1b from peraluminous granites at Northern Victoria Land, Antarctica
;
_database_code_amcsd 0002018
_chemical_formula_sum '(K.92 Na.08) Si3.2 Al2.64 Ti.06 Fe.06 Mg.06 H.3 O12'
_cell_length_a 5.186
_cell_length_b 9.005
_cell_length_c 20.031
_cell_angle_alpha 90
_cell_angle_beta 95.78
_cell_angle_gamma 90
_cell_volume 930.690
_exptl_crystal_density_diffrn      2.847
_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   0.09858   0.25000   0.92000
Na   0.00000   0.09858   0.25000   0.08000
Si1   0.45162   0.25835   0.13548   0.80000
Al1   0.45162   0.25835   0.13548   0.20000
Si2   0.96505   0.42957   0.13546   0.80000
Al2   0.96505   0.42957   0.13546   0.20000
Ti2   0.24910   0.08314   0.00002   0.03000
Fe2   0.24910   0.08314   0.00002   0.03000
Mg2   0.24910   0.08314   0.00002   0.03000
Al2   0.24910   0.08314   0.00002   0.91000
Al1   0.75000   0.25000   0.00000   0.02000
H   0.89100   0.13000   0.06000   0.15000
O11   0.75030   0.31140   0.15768   1.00000
O21   0.24940   0.36980   0.16880   1.00000
O22   0.41800   0.09300   0.16826   1.00000
O31   0.38540   0.25130   0.05351   1.00000
O32   0.96130   0.44330   0.05344   1.00000
O4   0.95720   0.06190   0.05034   1.00000
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 0.02212 0.02206 0.02193 0.00000 0.00287 0.00000
Na 0.02212 0.02206 0.02193 0.00000 0.00287 0.00000
Si1 0.00486 0.00546 0.00865 -0.00009 0.00094 0.00027
Al1 0.00486 0.00546 0.00865 -0.00009 0.00094 0.00027
Si2 0.00512 0.00472 0.00865 0.00009 0.00135 0.00036
Al2 0.00512 0.00472 0.00865 0.00009 0.00135 0.00036
Ti2 0.00593 0.00653 0.00966 -0.00038 0.00120 0.00045
Fe2 0.00593 0.00653 0.00966 -0.00038 0.00120 0.00045
Mg2 0.00593 0.00653 0.00966 -0.00038 0.00120 0.00045
Al2 0.00593 0.00653 0.00966 -0.00038 0.00120 0.00045
O11 0.01295 0.01725 0.01610 -0.00424 -0.00052 0.00482
O21 0.01133 0.01479 0.01469 0.00377 0.00078 -0.00245
O22 0.01861 0.00945 0.01268 0.00118 0.00349 0.00009
O31 0.00985 0.00781 0.00885 -0.00094 0.00193 0.00045
O32 0.00809 0.00863 0.01026 0.00094 0.00177 0.00036
O4 0.00917 0.00986 0.01147 -0.00118 0.00313 -0.00236