Rippite
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
Minerals 10 (2020) 1102
Rippite, K2(Nb,Ti)2(Si4O12)O(O,F), a new K-Nb-cyclosilicate from Chuktukon
Carbonatite Massif, Chadobets Upland, Krasnoyarsk Territory, Russia
Locality: Chuktukon Carbonatite Massif, Russia
_database_code_amcsd 0020927
8.73885 8.73885 8.1277 90 90 90 P4bm
atom      x      y      z occ  Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
Nb1       0      0 .23217 .96 .0255  .0105  .0105  .0555   .000   .000   .000
Ti1       0      0 .23217 .02 .0255  .0105  .0105  .0555   .000   .000   .000
Zr1       0      0 .23217 .01 .0255  .0105  .0105  .0555   .000   .000   .000
Nb2       0      0 .73373 .96 .0237  .0114  .0114  .0483   .000   .000   .000
Ti2       0      0 .73373 .02 .0237  .0114  .0114  .0483   .000   .000   .000
Zr2       0      0 .73373 .01 .0237  .0114  .0114  .0483   .000   .000   .000
K    .32254 .82254  .0003     .0216  .0237  .0237  .0176 -.0041  .0004  .0004
Si1  .12425 .62425  .3080     .0139  .0141  .0141  .0133 -.0007 -.0001 -.0001
Si2  .12401 .62401 .69906     .0076  .0098  .0098  .0032  .0005 -.0002 -.0002
O1    .4240  .2895  .2361     .0182  .0189  .0109  .0247 -.0009 -.0029 -.0022
O2    .4229  .2877  .7680     .0158  .0217  .0147  .0110 -.0043 -.0001 -.0035
O3        0      0 -.0020     .0200  .0161  .0161   .028   .000   .000   .000
O4        0      0  .4943     .0229  .0194  .0194   .030   .000   .000   .000
O5    .1204  .6204  .4974     .0203  .0264  .0264  .0080 -.0090 -.0054 -.0054
O6       .5      0  .2356     .0156  .0139  .0139   .019   .005   .000   .000
O7       .5      0  .7679     .0138   .017   .017   .007   .007   .000   .000