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 = 298 K
;
_database_code_amcsd 0006921
_chemical_formula_sum 'K Ca.55 Na1.39 Fe5.06 Si8 O24 H2'
_cell_length_a 10.1448
_cell_length_b 18.1841
_cell_length_c 5.2962
_cell_angle_alpha 90
_cell_angle_beta 104.415
_cell_angle_gamma 90
_cell_volume 946.253
_exptl_crystal_density_diffrn      3.462
_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   0.03910
CaM4   0.00000   0.27738   0.50000   0.27500   0.01410
NaM4   0.00000   0.27738   0.50000   0.69500   0.01410
FeM1   0.00000   0.09184   0.50000   1.00000   0.00720
FeM2   0.00000   0.18382   0.00000   1.00000   0.00710
FeM3   0.00000   0.00000   0.00000   1.00000   0.00700
FeM4   0.00000   0.27738   0.50000   0.03000   0.01410
Si1   0.27313   0.08520   0.29382   1.00000   0.00380
Si2   0.28545   0.17036   0.80106   1.00000   0.00430
O1   0.11040   0.08950   0.21030   1.00000   0.00620
O2   0.12160   0.17299   0.72730   1.00000   0.00750
O3   0.10610   0.00000   0.70830   1.00000   0.00800
H   0.19200   0.00000   0.76100   1.00000   0.05000
O4   0.36430   0.24520   0.79620   1.00000   0.01000
O5   0.34150   0.12755   0.08660   1.00000   0.00870
O6   0.33650   0.11610   0.58710   1.00000   0.00900
O7   0.32570   0.00000   0.29640   1.00000   0.00880