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: Ri15, T = 298 K
;
_database_code_amcsd 0006923
_chemical_formula_sum 'K (Ca.52 Na1.48) Fe5 Si8 O24 H2'
_cell_length_a 10.1361
_cell_length_b 18.1648
_cell_length_c 5.3030
_cell_angle_alpha 90
_cell_angle_beta 104.327
_cell_angle_gamma 90
_cell_volume 946.023
_exptl_crystal_density_diffrn      3.454
_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   0.03550
CaM4   0.00000   0.27751   0.50000   0.26000   0.01280
NaM4   0.00000   0.27751   0.50000   0.74000   0.01280
FeM1   0.00000   0.09181   0.50000   1.00000   0.00700
FeM2   0.00000   0.18397   0.00000   1.00000   0.00670
FeM3   0.00000   0.00000   0.00000   1.00000   0.00750
Si1   0.27264   0.08535   0.29418   1.00000   0.00340
Si2   0.28523   0.17043   0.80135   1.00000   0.00380
O1   0.11030   0.08988   0.21040   1.00000   0.00610
O2   0.12120   0.17308   0.72830   1.00000   0.00740
O3   0.10580   0.00000   0.70840   1.00000   0.00300
H   0.15000   0.00000   0.70000   1.00000   0.03000
O4   0.36420   0.24536   0.79710   1.00000   0.00940
O5   0.34140   0.12746   0.08680   1.00000   0.00770
O6   0.33630   0.11632   0.58710   1.00000   0.00800
O7   0.32460   0.00000   0.29790   1.00000   0.00820