data_global
_chemical_name_mineral 'Potassic-ferri-ferrorichterite'
loop_
_publ_author_name
'Redhammer G J'
'Roth G'
_journal_name_full 'European Journal of Mineralogy'
_journal_volume 14 
_journal_year 2002
_journal_page_first 105
_journal_page_last 114
_publ_section_title
;
 Crystal structure and Mossbauer spectroscopy of the synthetic amphibole
 potassic-ferri-ferrorichterite at 298 K and low temperatures (80-110 K)
 Sample: Ri1, T = 110 K
;
_database_code_amcsd 0006922
_chemical_formula_sum 'K Ca.57 Na1.37 Fe5.06 Si8 O24 H2'
_cell_length_a 10.1306
_cell_length_b 18.1678
_cell_length_c 5.2889
_cell_angle_alpha 90
_cell_angle_beta 104.54
_cell_angle_gamma 90
_cell_volume 942.250
_exptl_crystal_density_diffrn      3.478
_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
KA2/m   0.00000   0.50000   0.00000   1.00000   0.01680
CaM4   0.00000   0.27716   0.50000   0.28500   0.00540
NaM4   0.00000   0.27716   0.50000   0.68500   0.00540
FeM1   0.00000   0.09176   0.50000   1.00000   0.00290
FeM2   0.00000   0.18351   0.00000   1.00000   0.00310
FeM3   0.00000   0.00000   0.00000   1.00000   0.00280
FeM4   0.00000   0.27716   0.50000   0.03000   0.00540
Si1   0.27347   0.08524   0.29470   1.00000   0.00080
Si2   0.28572   0.17042   0.80180   1.00000   0.00100
O1   0.11030   0.08944   0.21020   1.00000   0.00210
O2   0.12100   0.17299   0.72760   1.00000   0.00300
O3   0.10580   0.00000   0.70840   1.00000   0.00310
H   0.18900   0.00000   0.75000   1.00000   0.01000
O4   0.36420   0.24551   0.79510   1.00000   0.00420
O5   0.34230   0.12828   0.08910   1.00000   0.00330
O6   0.33690   0.11572   0.58890   1.00000   0.00280
O7   0.32660   0.00000   0.29540   1.00000   0.00350