data_global
_chemical_name_mineral 'Mica'
loop_
_publ_author_name
'Comodi P'
'Drabek M'
'Montagnoli M'
'Rieder M'
'Weiss Z'
'Zanazzi P F'
_journal_name_full 'Physics and Chemistry of Minerals'
_journal_volume 30 
_journal_year 2003
_journal_page_first 198
_journal_page_last 205
_publ_section_title
;
 Pressure-induced phase transition in synthetic trioctahedral Rb-mica
 Sample: P = 4.75 GPa
;
_database_code_amcsd 0008761
_chemical_formula_sum 'Rb.99 Fe4.07 Si2.96 O12 H2'
_cell_length_a 5.420
_cell_length_b 9.383
_cell_length_c 9.846
_cell_angle_alpha 90
_cell_angle_beta 100.8
_cell_angle_gamma 90
_cell_volume 491.858
_exptl_crystal_density_diffrn      3.977
_symmetry_space_group_name_H-M 'C 1 2/m 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  'x,-y,z'
  '1/2+x,1/2-y,z'
  '-x,y,-z'
  '1/2-x,1/2+y,-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_U_iso_or_equiv
Rb   0.00000   0.50000   0.00000   0.99000   0.15300
FeM1   0.00000   0.00000   0.50000   1.00000   0.01100
FeM2   0.00000   0.33270   0.50000   1.00000   0.01100
FeT   0.07600   0.16630   0.22700   0.26750   0.02200
SiT   0.07600   0.16630   0.22700   0.74000   0.02200
O1   0.11000   0.00000   0.18000   1.00000   0.14900
O2   0.27300   0.26300   0.15500   1.00000   0.06400
O3   0.14400   0.15800   0.41700   1.00000   0.03300
O-H   0.12700   0.50000   0.36600   1.00000 ?