data_global
_chemical_name_mineral 'Epididymite-potassian'
loop_
_publ_author_name
'Naumova I S'
'Pobedimskaya E A'
'Pushcharovskii D Y'
'Belov N V'
'Altukhova Yu N'
_journal_name_full 'Doklady Akademii Nauk SSSR'
_journal_volume 229 
_journal_year 1976
_journal_page_first 856
_journal_page_last 859
_publ_section_title
;
 Crystal structure of synthetic K2Be2Si6O15 of the epidimite group
 Note: c-cell edge altered to reproduce bond lengths
;
_database_code_amcsd 0012454
_chemical_compound_source 'Synthetic'
_chemical_formula_sum 'K2 Be2 Si6 O15'
_cell_length_a 7.485
_cell_length_b 15.453
_cell_length_c 11.418
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 1320.671
_exptl_crystal_density_diffrn      2.538
_symmetry_space_group_name_H-M 'C m c 21'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  'x,-y,1/2+z'
  '1/2+x,1/2-y,1/2+z'
  '-x,y,z'
  '1/2-x,1/2+y,z'
  '-x,-y,1/2+z'
  '1/2-x,1/2-y,1/2+z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
K1   0.50000   0.28180   0.36190   0.03141
K2   0.50000   0.39870   0.08400   0.01178
Be1   0.14890   0.37980   0.22750   0.00329
Si1   0.21170   0.20950   0.13360   0.00773
Si2   0.20460   0.05560   0.31030   0.00507
Si3   0.00000   0.34970   0.46590   0.00405
Si4   0.00000   0.45450   0.00090   0.00659
O1   0.32200   0.20000   0.01090   0.00849
O2   0.25830   0.12910   0.21640   0.01710
O3   0.32450   0.07640   0.42960   0.01077
O4   0.27010   0.29580   0.19450   0.00912
O5   0.27040   0.46230   0.26310   0.01469
O6   0.00000   0.21600   0.09480   0.02989
O7   0.00000   0.40630   0.12830   0.00861
O8   0.00000   0.07150   0.35180   0.00165
O9   0.00000   0.35420   0.33200   0.00659
O10   0.00000   0.44090   0.52560   0.01203