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 = .0001 GPa, data collected in air
;
_database_code_amcsd 0008757
_chemical_formula_sum 'Rb.99 Fe4.07 Si2.96 O12 H2'
_cell_length_a 5.476
_cell_length_b 9.493
_cell_length_c 10.514
_cell_angle_alpha 90
_cell_angle_beta 99.95
_cell_angle_gamma 90
_cell_volume 538.335
_exptl_crystal_density_diffrn      3.634
_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   0.03170
FeM1   0.00000   0.00000   0.50000   1.00000   0.01210
FeM2   0.00000   0.33215   0.50000   1.00000   0.01260
FeT   0.07660   0.16650   0.22948   0.26750   0.01390
SiT   0.07660   0.16650   0.22948   0.74000   0.01390
O1   0.04700   0.00000   0.17360   1.00000   0.04460
O2   0.31390   0.24430   0.17400   1.00000   0.04450
O3   0.13080   0.16650   0.39310   1.00000   0.01380
O-H   0.13220   0.50000   0.39880   1.00000   0.01580