data_global
_chemical_name_mineral 'Muscovite-3T'
loop_
_publ_author_name
'Guven N'
'Burnham C W'
_journal_name_full 'Zeitschrift fur Kristallographie'
_journal_volume 125 
_journal_year 1967
_journal_page_first 163
_journal_page_last 183
_publ_section_title
;
 The crystal structure of 3T muscovite
 Snohomish County, Washington, USA
;
_database_code_amcsd 0010646
_chemical_compound_source 'in granodiorite near Sunrise Copper Prospect, Sultan Basin,'
_chemical_formula_sum '(K.9 Na.06 Ca.02 Ba.02) Al2.53 Fe.08 Mg.08 Ti.01 Si3.3 O12 H2'
_cell_length_a 5.1963
_cell_length_b 5.1963
_cell_length_c 29.9705
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 700.831
_exptl_crystal_density_diffrn      2.857
_symmetry_space_group_name_H-M 'P 31 1 2'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-x+y,y,1/3-z'
  '-y,x-y,1/3+z'
  '-y,-x,2/3-z'
  '-x+y,-x,2/3+z'
  'x,x-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   0.13000  -0.13000   0.83333   0.90000   0.02191
Na   0.13000  -0.13000   0.83333   0.06000   0.02191
Ca   0.13000  -0.13000   0.83333   0.02000   0.02191
Ba   0.13000  -0.13000   0.83333   0.02000   0.02191
Al1  -0.23000   0.23000   0.33333   0.83000   0.01203
Fe3+1  -0.23000   0.23000   0.33333   0.04000   0.01203
Fe2+1  -0.23000   0.23000   0.33333   0.04000   0.01203
Mg1  -0.23000   0.23000   0.33333   0.08000   0.01203
Ti1  -0.23000   0.23000   0.33333   0.01000   0.01203
Al2   0.10000  -0.10000   0.33333   1.00000   0.00937
Si1   0.79600   0.20000  -0.08940   0.65000   0.00241
Al1   0.79600   0.20000  -0.08940   0.35000   0.00241
Si2   0.46200   0.55000  -0.08950   1.00000   0.00823
Oa   0.75000   0.17800  -0.03570   1.00000   0.01938
Ob   0.52200   0.56600  -0.03630   1.00000   0.00507
O-H   0.11200  -0.08500  -0.03370   1.00000   0.00494
Oc   0.66600   0.85700  -0.11100   1.00000   0.00937
Od   0.14000   0.45100  -0.10580   1.00000   0.01013
Oe   0.56300   0.31100  -0.10980   1.00000   0.00215