data_9009495
_chemical_name 'Roedderite'
loop_
_publ_author_name
'Alietti E'
'Brigatti M F'
'Capedri S'
'Poppi L'
_journal_name_full "Mineralogical Magazine"
_journal_volume 58
_journal_year 1994
_journal_page_first 655
_journal_page_last 662
_publ_section_title
;
 The roedderite-chayesite series from Spanish lamproites:
 crystal chemical characterization
 Locality: Cancarix, Albacete province, Spain
;
_chemical_formula_sum 'K.8 Na.6 (Mg4.3 Fe.7) Si12 O30'
_cell_length_a 10.135
_cell_length_b 10.135
_cell_length_c 14.320
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 1273.858
_symmetry_space_group_name_H-M 'P 6/m c c'
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '-x,-x+y,1/2+z'
  'x,x-y,1/2-z'
  '-x+y,-x,-z'
  'x-y,x,z'
  '-y,-x,1/2+z'
  'y,x,1/2-z'
  'y,-x+y,-z'
  '-y,x-y,z'
  'x-y,-y,1/2+z'
  '-x+y,y,1/2-z'
  'x,y,-z'
  '-x,-y,z'
  'x,x-y,1/2+z'
  '-x,-x+y,1/2-z'
  'x-y,x,-z'
  '-x+y,-x,z'
  'y,x,1/2+z'
  '-y,-x,1/2-z'
  '-y,x-y,-z'
  'y,-x+y,z'
  '-x+y,y,1/2+z'
  'x-y,-y,1/2-z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_Uiso_or_equiv
KC   0.00000   0.00000   0.25000   0.80000   0.02077
NaC   0.00000   0.00000   0.25000   0.20000   0.02077
NaB   0.33333   0.66667  -0.01880   0.10000   0.01267
MgA   0.33333   0.66667   0.25000   0.86000   0.01064
Fe3+A   0.33333   0.66667   0.25000   0.14000   0.01064
MgT2   0.50000   0.50000   0.25000   0.86000   0.01051
Fe3+T2   0.50000   0.50000   0.25000   0.14000   0.01051
SiT1   0.23807   0.35288   0.39065   1.00000   0.01013
O1   0.12990   0.39430   0.00000   1.00000   0.02102
O2   0.21970   0.27770   0.13325   1.00000   0.01900
O3   0.15520   0.49670   0.17230   1.00000   0.01393