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 = 7.2 GPa
;
_database_code_amcsd 0008762
_chemical_formula_sum 'Rb.99 Fe4.07 Si2.96 O12 H2'
_cell_length_a 5.410
_cell_length_b 9.325
_cell_length_c 9.645
_cell_angle_alpha 90
_cell_angle_beta 100.7
_cell_angle_gamma 90
_cell_volume 478.113
_exptl_crystal_density_diffrn      4.092
_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   0.14600
FeM1   0.00000   0.00000   0.50000   1.00000   0.01500
FeM2   0.00000   0.33400   0.50000   1.00000   0.01200
FeT   0.06800   0.16700   0.21100   0.26750   0.02700
SiT   0.06800   0.16700   0.21100   0.74000   0.02700
O1   0.09000   0.00000   0.17000   1.00000   0.09600
O2   0.27600   0.27100   0.16000   1.00000   0.07600
O3   0.12900   0.16400   0.39000   1.00000   0.01400
O-H   0.13100   0.50000   0.37200   1.00000 ?