Ivanyukite-Na
Yakovenchuk V N, Nikolaev A P, Selivanova E A, Pakhomovsky Y A,
Korchak J A, Spiridonova D V, Zalkind O A, Krivovichev S V
American Mineralogist 94 (2009) 1450-1458
Ivanyukite-Na-T, ivanyukite-Na-C, ivanyukite-K, and ivanyukite-Cu:
New microporous titanosilicates from the Khibiny massif
(Kola Peninsula, Russia) and crystal structure of ivanyukite-Na-T
Locality: Koashva Mountain, Khibiny Massif, Kola Peninsula, Russia
Note: trigonal polytype, Ivanyukite-Na-T
_database_code_amcsd 0004993
10.921 10.921 13.885 90 90 120 R3m
atom     x     y     z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
Ti1  .4793 .2397 .3529     .026   .025  .0233   .029  .0126  .0023  .0011
Ti2    2/3   1/3 .1747     .033   .027   .027   .045  .0134   .000   .000
Si   .3323 .1661 .1461     .031   .027   .026   .041  .0134  -.014 -.0068
K      2/3   1/3 .6181 .52 .038
Na   .1974 .3949 .2062 .48 .029
O1   .3317 .1658 .2665     .037   .012   .044   .045   .006  -.012  -.006
O2   .2616 .0061 .1036     .033   .034   .026   .035   .013  -.007  -.004
O3   .4934 .2467 .1031     .030   .027   .020   .045   .013  -.024  -.012
O4     2/3   1/3  .426     .030   .027   .027   .036   .013   .000   .000
O5   .5900 .4100 .2750     .038   .039   .039   .041   .023  -.002   .002
Wat6  .140  .280  .352     .092
Wat7  .098 .5491  .238     .072