data_global
_chemical_name_mineral 'Eifelite'
loop_
_publ_author_name
'Nguyen N'
'Choisnet J'
'Raveau B'
_journal_name_full 'Journal of Solid State Chemistry'
_journal_volume 34 
_journal_year 1980
_journal_page_first 1
_journal_page_last 9
_publ_section_title
;
 Silicates synthetiques a structure milarite
;
_database_code_amcsd 0013387
_chemical_compound_source 'Synthetic'
_chemical_formula_sum 'K Na Mg5 Si12 O30'
_cell_length_a 10.152
_cell_length_b 10.152
_cell_length_c 14.28
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 1274.565
_exptl_crystal_density_diffrn      2.607
_symmetry_space_group_name_H-M 'P 6/m c c'
loop_
_space_group_symop_operation_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_U_iso_or_equiv
KA1   0.00000   0.00000   0.25000   1.00000   0.02786
NaA2   0.33333   0.66667   0.00000   0.50000   0.00760
MgM1   0.33333   0.66667   0.25000   1.00000   0.02153
MgM2   0.50000   0.00000   0.25000   1.00000   0.01520
Si   0.76300   0.11400   0.10900   1.00000   0.01393
O1   0.73400   0.13200   0.00000   1.00000   0.00760
O2   0.94500   0.22100   0.13300   1.00000   0.01773
O3   0.66200   0.15700   0.17200   1.00000   0.00887