data_global
_chemical_name_mineral 'Fenaksite'
loop_
_publ_author_name
'Golovachev V P'
'Drozdov Y N'
'Kuz'min E A'
'Belov N V'
_journal_name_full 'Soviet Physics Doklady'
_journal_volume 15 
_journal_year 1971
_journal_page_first 902
_journal_page_last 904
_publ_section_title
;
 The crystal structure of phenaxite FeNaK(Si4O10)(KNaFe[Si4O10])
;
_database_code_amcsd 0015598
_chemical_compound_source 'Khibiny massif, Kola Peninsula, Russia'
_chemical_formula_sum 'K Na Fe Si4 O10'
_cell_length_a 6.98
_cell_length_b 8.24
_cell_length_c 9.98
_cell_angle_alpha 114.2
_cell_angle_beta 80.23
_cell_angle_gamma 115.6
_cell_volume 472.143
_exptl_crystal_density_diffrn      2.745
_symmetry_space_group_name_H-M 'P -1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
K   0.14000   0.80900   0.01000   0.00760
Na   0.52500   0.27000   0.41000   0.00760
Fe2+   0.04900   0.29900   0.40700   0.00760
Si1   0.66900   0.91300   0.21300   0.00760
Si2   0.23000   0.63100   0.27000   0.00760
Si3   0.38000   0.30400   0.13100   0.00760
Si4   0.80300   0.63200   0.27300   0.00760
O1   0.63000   0.85600   0.04100   0.00760
O2   0.29400   0.45700   0.13300   0.00760
O3   0.63200   0.42400   0.16700   0.00760
O4   0.43100   0.83800   0.28600   0.00760
O5   0.79100   0.79800   0.23000   0.00760
O6   0.79000   0.13900   0.28000   0.00760
O7   0.03300   0.62900   0.20500   0.00760
O8   0.17500   0.58900   0.41800   0.00760
O9   0.76000   0.65500   0.43600   0.00760
O10   0.25100   0.19200   0.23700   0.00760