data_global
_amcsd_formula_title 'RbFeSi3O8'
loop_
_publ_author_name
'Brunton G D'
'Harris L A'
'Kopp O C'
_journal_name_full 'American Mineralogist'
_journal_volume 57 
_journal_year 1972
_journal_page_first 1720
_journal_page_last 1728
_publ_section_title
;
 Crystal structure of a rubidium iron feldspar
;
_database_code_amcsd 0000297
_chemical_formula_sum 'Rb (Si2.912 Fe1.088) O8'
_cell_length_a 8.952
_cell_length_b 13.127
_cell_length_c 7.359
_cell_angle_alpha 90.05
_cell_angle_beta 116.47
_cell_angle_gamma 89.35
_cell_volume 774.063
_exptl_crystal_density_diffrn      3.055
_symmetry_space_group_name_H-M 'C -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'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
Rb1   0.29248  -0.00054   0.14784   1.00000
Si1o   0.00710  -0.80854   0.21900   0.51300
Fe1o   0.00710  -0.80854   0.21900   0.48700
Si1m   0.00730  -0.19027   0.22280   0.61100
Fe1m   0.00730  -0.19027   0.22280   0.38900
Si2o   0.72020  -0.88080   0.34220   0.89000
Fe2o   0.72020  -0.88080   0.34220   0.11000
Si2m   0.71970  -0.11780   0.34430   0.89800
Fe2m   0.71970  -0.11780   0.34430   0.10200
OA1   0.66570   0.00080   0.28210   1.00000
OA2   0.00020  -0.14820   0.00510   1.00000
OBo   0.82170  -0.84220   0.22280   1.00000
OBm   0.82420  -0.15760   0.22720   1.00000
OCo   0.04670  -0.67990   0.26330   1.00000
OCm   0.04580  -0.31720   0.26710   1.00000
ODo   0.17360  -0.87490   0.41140   1.00000
ODm   0.17020  -0.12640   0.41380   1.00000
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Rb1 0.02505 0.03072 0.02528 0.00085 0.01118 0.00692
Si1o 0.01756 0.01859 0.01605 0.00437 0.00882 0.00293
Fe1o 0.01756 0.01859 0.01605 0.00437 0.00882 0.00293
Si1m 0.01854 0.01981 0.01737 -0.00155 0.00936 -0.00333
Fe1m 0.01854 0.01981 0.01737 -0.00155 0.00936 -0.00333
Si2o 0.02212 0.01746 0.01561 0.00160 0.00829 -0.00044
Fe2o 0.02212 0.01746 0.01561 0.00160 0.00829 -0.00044
Si2m 0.02114 0.01667 0.01495 0.00213 0.00775 0.00131
Fe2m 0.02114 0.01667 0.01495 0.00213 0.00775 0.00131
OA1 0.05367 0.02008 0.02814 0.00160 0.00294 -0.00131
OA2 0.02212 0.02880 0.05012 -0.00213 0.01043 -0.00394
OBo 0.03773 0.04975 0.03847 -0.00266 0.02674 -0.00920
OBm 0.04326 0.04975 0.04683 0.00533 0.03610 0.01183
OCo 0.02927 0.02880 0.02550 -0.00160 0.01016 0.00131
OCm 0.02537 0.03055 0.02528 0.00213 0.00829 -0.00350
ODo 0.03155 0.02444 0.01583 0.00266 0.00722 0.00131
ODm 0.02927 0.02269 0.01627 0.00000 0.00321 0.00088