data_global
_chemical_name_mineral 'Rippite'
loop_
_publ_author_name
'Sharygin V V'
'Doroshkevich A G'
'Seryotkin Y V'
'Karmanov N S'
'Belogub E V'
'Moroz T N'
'Nigmatulina E N'
'Yelisseyev A P'
'Vedenyapin V N'
'Kupriyanov I N'
_journal_name_full 'Minerals'
_journal_volume 10 
_journal_year 2020
_journal_page_first 
_journal_page_last 1102
_publ_section_title
;
 Rippite, K2(Nb,Ti)2(Si4O12)O(O,F), a new K-Nb-cyclosilicate from Chuktukon
 Carbonatite Massif, Chadobets Upland, Krasnoyarsk Territory, Russia
;
_database_code_amcsd 0020927
_chemical_compound_source 'Chuktukon Carbonatite Massif, Russia'
_chemical_formula_sum 'Nb.96 Ti.02 Zr.01 K Si2 O7'
_cell_length_a 8.73885
_cell_length_b 8.73885
_cell_length_c 8.1277
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 620.692
_exptl_crystal_density_diffrn      3.192
_symmetry_space_group_name_H-M 'P 4 b m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2-y,1/2-x,z'
  '-y,x,z'
  '1/2+x,1/2-y,z'
  '-x,-y,z'
  '1/2+y,1/2+x,z'
  'y,-x,z'
  '1/2-x,1/2+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
Nb1   0.00000   0.00000   0.23217   0.96000   0.02550
Ti1   0.00000   0.00000   0.23217   0.02000   0.02550
Zr1   0.00000   0.00000   0.23217   0.01000   0.02550
Nb2   0.00000   0.00000   0.73373   0.96000   0.02370
Ti2   0.00000   0.00000   0.73373   0.02000   0.02370
Zr2   0.00000   0.00000   0.73373   0.01000   0.02370
K   0.32254   0.82254   0.00030   1.00000   0.02160
Si1   0.12425   0.62425   0.30800   1.00000   0.01390
Si2   0.12401   0.62401   0.69906   1.00000   0.00760
O1   0.42400   0.28950   0.23610   1.00000   0.01820
O2   0.42290   0.28770   0.76800   1.00000   0.01580
O3   0.00000   0.00000  -0.00200   1.00000   0.02000
O4   0.00000   0.00000   0.49430   1.00000   0.02290
O5   0.12040   0.62040   0.49740   1.00000   0.02030
O6   0.50000   0.00000   0.23560   1.00000   0.01560
O7   0.50000   0.00000   0.76790   1.00000   0.01380
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
Nb1 0.01050 0.01050 0.05550 0.00000 0.00000 0.00000
Ti1 0.01050 0.01050 0.05550 0.00000 0.00000 0.00000
Zr1 0.01050 0.01050 0.05550 0.00000 0.00000 0.00000
Nb2 0.01140 0.01140 0.04830 0.00000 0.00000 0.00000
Ti2 0.01140 0.01140 0.04830 0.00000 0.00000 0.00000
Zr2 0.01140 0.01140 0.04830 0.00000 0.00000 0.00000
K 0.02370 0.02370 0.01760 -0.00410 0.00040 0.00040
Si1 0.01410 0.01410 0.01330 -0.00070 -0.00010 -0.00010
Si2 0.00980 0.00980 0.00320 0.00050 -0.00020 -0.00020
O1 0.01890 0.01090 0.02470 -0.00090 -0.00290 -0.00220
O2 0.02170 0.01470 0.01100 -0.00430 -0.00010 -0.00350
O3 0.01610 0.01610 0.02800 0.00000 0.00000 0.00000
O4 0.01940 0.01940 0.03000 0.00000 0.00000 0.00000
O5 0.02640 0.02640 0.00800 -0.00900 -0.00540 -0.00540
O6 0.01390 0.01390 0.01900 0.00500 0.00000 0.00000
O7 0.01700 0.01700 0.00700 0.00700 0.00000 0.00000