data_global
_chemical_name_mineral 'Moskvinite-(Y)'
loop_
_publ_author_name
'Sokolova E V'
'Hawthorne F C'
'Agakhanov A A'
'Pautov L A'
_journal_name_full 'The Canadian Mineralogist'
_journal_volume 41 
_journal_year 2003
_journal_page_first 513
_journal_page_last 520
_publ_section_title
;
 The crystal structure of moskvinite-(Y), Na2K(Y,REE)[Si6O15], a new silicate
 mineral with [Si6O15] three-membered double-rings from the Dara-I-Pioz Moraine,
 Tien-Shan mountains, Tajikistan
;
_database_code_amcsd 0005835
_chemical_compound_source 'Dara-I-Pioz Moraine, Tien-Shan mountains, Tajikistan'
_chemical_formula_sum 'Na2 K (Y.77 Dy.09 Gd.04 Er.04 Ho.02 Sm.02 Nd.01 Tb.01) Si6 O15'
_cell_length_a 10.623
_cell_length_b 14.970
_cell_length_c 8.553
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 1360.152
_exptl_crystal_density_diffrn      2.925
_symmetry_space_group_name_H-M 'I b m m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,1/2+z'
  'x,y,1/2-z'
  '1/2+x,1/2+y,-z'
  '-x,-y,1/2+z'
  '1/2-x,1/2-y,+z'
  'x,-y,z'
  '1/2+x,1/2-y,1/2+z'
  '-x,y,-z'
  '1/2-x,1/2+y,1/2-z'
  '-x,y,1/2+z'
  '1/2-x,1/2+y,+z'
  'x,-y,1/2-z'
  '1/2+x,1/2-y,-z'
  '-x,-y,-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_occupancy
_atom_site_U_iso_or_equiv
Na   0.50000   0.25636   0.00000   1.00000   0.01780
K   0.43056   0.00000   0.25000   1.00000   0.02540
Y   0.25000   0.25000   0.25000   0.77000   0.00679
Dy   0.25000   0.25000   0.25000   0.09000   0.00679
Gd   0.25000   0.25000   0.25000   0.04000   0.00679
Er   0.25000   0.25000   0.25000   0.04000   0.00679
Ho   0.25000   0.25000   0.25000   0.02000   0.00679
Sm   0.25000   0.25000   0.25000   0.02000   0.00679
Nd   0.25000   0.25000   0.25000   0.01000   0.00679
Tb   0.25000   0.25000   0.25000   0.01000   0.00679
Si1   0.53384   0.40003   0.25000   1.00000   0.00943
Si2   0.22002   0.39603  -0.07776   1.00000   0.00934
O1   0.15917   0.37118  -0.25000   1.00000   0.01380
O2   0.43311   0.32256   0.25000   1.00000   0.01290
O3   0.37260   0.38915  -0.09771   1.00000   0.01290
O4   0.18101   0.50000  -0.04480   1.00000   0.01550
O5   0.16655   0.33667   0.05854   1.00000   0.01360
O6   0.47510   0.50000   0.25000   1.00000   0.01400
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Na 0.01680 0.01670 0.01970 0.00000 0.00510 0.00000
K 0.02340 0.03730 0.01540 0.00000 0.00000 0.00000
Y 0.00714 0.00699 0.00624 -0.00077 0.00000 0.00000
Dy 0.00714 0.00699 0.00624 -0.00077 0.00000 0.00000
Gd 0.00714 0.00699 0.00624 -0.00077 0.00000 0.00000
Er 0.00714 0.00699 0.00624 -0.00077 0.00000 0.00000
Ho 0.00714 0.00699 0.00624 -0.00077 0.00000 0.00000
Sm 0.00714 0.00699 0.00624 -0.00077 0.00000 0.00000
Nd 0.00714 0.00699 0.00624 -0.00077 0.00000 0.00000
Tb 0.00714 0.00699 0.00624 -0.00077 0.00000 0.00000
Si1 0.00830 0.00930 0.01080 -0.00130 0.00000 0.00000
Si2 0.01000 0.00910 0.00890 0.00008 0.00047 0.00111
O1 0.01160 0.01920 0.01070 -0.00250 0.00000 0.00000
O2 0.01090 0.01230 0.01540 -0.00380 0.00000 0.00000
O3 0.01010 0.01730 0.01140 0.00000 0.00030 0.00110
O4 0.01700 0.00860 0.02110 0.00000 0.00340 0.00000
O5 0.01390 0.01430 0.01270 -0.00120 -0.00100 0.00500
O6 0.01390 0.00970 0.01840 0.00000 0.00000 0.00000