data_9005458
_chemical_name 'Phengite'
loop_
_publ_author_name
'Smyth J R'
'Jacobsen S D'
'Swope R J'
'Angel R J'
'Arlt T'
'Domanik K'
'Holloway J R'
_journal_name_full "European Journal of Mineralogy"
_journal_volume 12
_journal_year 2000
_journal_page_first 955
_journal_page_last 963
_publ_section_title
;
 Crystal structures and compressibilities of synthetic 2M_1 and 3T phengite mica
 Sample: synthetic 2M_1
;
_chemical_formula_sum 'K.964 Al1.368 Mg.73 Fe.038 Si3.808 O11.2 F.8 H1.2'
_cell_length_a 5.2046
_cell_length_b 9.0368
_cell_length_c 19.886
_cell_angle_alpha 90
_cell_angle_beta 95.615
_cell_angle_gamma 90
_cell_volume 930.809
_symmetry_space_group_name_H-M 'C 1 2/c 1'
loop_
_symmetry_equiv_pos_as_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
_atom_site_Uiso_or_equiv
K   0.00000   0.09360   0.25000   0.96400   0.03140
AlM2   0.24630   0.08152   0.00008   0.58800   0.01440
MgM2   0.24630   0.08152   0.00008   0.36500   0.01440
FeM2   0.24630   0.08152   0.00008   0.01900   0.01440
SiT1   0.46190   0.92804   0.13519   0.95200   0.01350
AlT1   0.46190   0.92804   0.13519   0.04800   0.01350
SiT2   0.45240   0.25805   0.13522   0.95200   0.01400
AlT2   0.45240   0.25805   0.13522   0.04800   0.01400
O1   0.46010   0.09310   0.16892   1.00000   0.01870
O2   0.22530   0.83490   0.16261   1.00000   0.01790
O3   0.22560   0.34780   0.16924   1.00000   0.01930
O4   0.45300   0.93490   0.05491   1.00000   0.01820
O5   0.40160   0.25130   0.05458   1.00000   0.01760
O-h6   0.45550   0.56610   0.05460   0.60000   0.02610
F6   0.45550   0.56610   0.05460   0.40000   0.02610
H   0.39500   0.63400   0.05800   0.60000   0.02300