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 GA1 from a pegmatite on Maddalena Island, Italy
;
_database_code_amcsd 0002013
_chemical_formula_sum '(K.99 Na.01) Si3.32 Al2.37 Fe.3 Mn.06 H.3 O11.96 F.04'
_cell_length_a 5.226
_cell_length_b 9.074
_cell_length_c 20.039
_cell_angle_alpha 90
_cell_angle_beta 95.74
_cell_angle_gamma 90
_cell_volume 945.499
_exptl_crystal_density_diffrn      2.870
_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   0.09620   0.25000   0.99000
Na   0.00000   0.09620   0.25000   0.01000
Si1   0.45270   0.25782   0.13538   0.83000
Al1   0.45270   0.25782   0.13538   0.17000
Si2   0.96420   0.42858   0.13538   0.83000
Al2   0.96420   0.42858   0.13538   0.17000
Fe2   0.24970   0.08323   0.00002   0.15000
Mn2   0.24970   0.08323   0.00002   0.03000
Al2   0.24970   0.08323   0.00002   0.82000
Al1   0.75000   0.25000   0.00000   0.05000
H   0.87600   0.14300   0.04600   0.15000
O11   0.74020   0.32110   0.15966   1.00000
O21   0.24100   0.36110   0.16867   1.00000
O22   0.43440   0.09270   0.16815   1.00000
O31   0.39240   0.25140   0.05367   1.00000
O32   0.95720   0.43980   0.05377   1.00000
O4   0.95490   0.06460   0.05098   0.98000
F4   0.95490   0.06460   0.05098   0.02000
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 0.02192 0.02528 0.02296 0.00000 0.00126 0.00000
Na 0.02192 0.02528 0.02296 0.00000 0.00126 0.00000
Si1 0.00575 0.00776 0.00785 0.00072 -0.00026 0.00027
Al1 0.00575 0.00776 0.00785 0.00072 -0.00026 0.00027
Si2 0.00644 0.00663 0.00745 0.00000 0.00032 0.00064
Al2 0.00644 0.00663 0.00745 0.00000 0.00032 0.00064
Fe2 0.00767 0.00909 0.00947 0.00022 0.00021 0.00008
Mn2 0.00767 0.00909 0.00947 0.00022 0.00021 0.00008
Al2 0.00767 0.00909 0.00947 0.00022 0.00021 0.00008
O11 0.01315 0.02378 0.01692 -0.00645 -0.00105 0.00302
O21 0.01438 0.02169 0.01450 0.00741 0.00053 -0.00082
O22 0.02205 0.01168 0.01490 0.00143 0.00053 0.00009
O31 0.01288 0.01710 0.00886 0.00072 0.00042 0.00211
O32 0.01452 0.01710 0.00926 -0.00048 0.00053 0.00110
O4 0.02041 0.01669 0.00987 0.00454 0.00210 -0.00220
F4 0.02041 0.01669 0.00987 0.00454 0.00210 -0.00220