data_global
_chemical_name_mineral 'Pyatenkoite-(Y)'
loop_
_publ_author_name
'Rastsvetaeva R K'
'Khomyakov A P'
_journal_name_full 'Doklady Chemistry'
_journal_volume 351 
_journal_year 1996
_journal_page_first 283
_journal_page_last 286
_publ_section_title
;
 Crystal structure of pyatenkoite-(Y) Na5YTiSi6O18*6H2O, a new mineral of the
 hilairite group: crystal structure
;
_database_code_amcsd 0012500
_chemical_compound_source 'Lovozero massif, Kola Peninsula, Russia'
_chemical_formula_sum 'Na5 (Y.5 Dy.3 Gd.2) (Ti.8 Nb.2) Si6 O24 H12'
_cell_length_a 10.696
_cell_length_b 10.696
_cell_length_c 15.728
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 1558.285
_exptl_crystal_density_diffrn      2.753
_symmetry_space_group_name_H-M 'R 3 2'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '2/3+x,1/3+y,1/3+z'
  '1/3+x,2/3+y,2/3+z'
  '-x,-x+y,-z'
  '2/3-x,1/3-x+y,1/3-z'
  '1/3-x,2/3-x+y,2/3-z'
  'y,x,-z'
  '2/3+y,1/3+x,1/3-z'
  '1/3+y,2/3+x,2/3-z'
  'x-y,-y,-z'
  '2/3+x-y,1/3-y,1/3-z'
  '1/3+x-y,2/3-y,2/3-z'
  '-y,x-y,z'
  '2/3-y,1/3+x-y,1/3+z'
  '1/3-y,2/3+x-y,2/3+z'
  '-x+y,-x,z'
  '2/3-x+y,1/3-x,1/3+z'
  '1/3-x+y,2/3-x,2/3+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
Na1   0.00000   0.00000   0.19330   1.00000   0.02786
Na2   0.36500   0.00000   0.50000   1.00000   0.03926
YM2   0.33333   0.66667   0.16667   0.50000   0.01279
DyM2   0.33333   0.66667   0.16667   0.30000   0.01279
GdM2   0.33333   0.66667   0.16667   0.20000   0.01279
TiM1   0.00000   0.00000   0.00000   0.80000   0.00988
NbM1   0.00000   0.00000   0.00000   0.20000   0.00988
Si   0.42280   0.40730   0.24760   1.00000   0.00874
O1   0.09200   0.16800   0.07490   1.00000   0.01520
O2   0.10300   0.21100   0.57200   1.00000   0.01646
O3   0.65700   0.00000   0.00000   1.00000   0.01267
O4   0.64100   0.00000   0.50000   1.00000   0.02280
Ow5   0.50300   0.14400   0.05890   1.00000   0.02280
H1   0.53000   0.43000   0.04000   1.00000   0.02533
H2   0.48000   0.68000   0.00000   1.00000   0.02533