Hilairite-(Ba)
Zubkova N V, Kolitsch U, Pekov I V, Turchkova A G, Vigasina M F, Pushcharovsky D Y, Tillmanns E
European Journal of Mineralogy 21 (2009) 495-506
Crystal chemistry of Rb-, Sr-, Ba-, Ca- and Pb-exchanged forms of natural hilairite
Locality: Kirovskii  mine, Khibiny alkaline complex, Kola Peninsula, Russia
Note: sample was synthesized by cation exchange at 150 C
_database_code_amcsd 0007283
20.976 20.976 7.857 90 90 120 R3
atom        x      y      z  occ   Uiso
Ba1    .82788 .65729 .21606 .981  .0363
Ba2       1/3    2/3 .22359 .888  .0415
Zr1         0      0 .04324       .0103
Zr2    .50167 .49847 .05010      .01048
Si1    .67151 .62881 -.0854       .0182
Si2    .53776 .36444  .1893       .0186
Si3    .32781  .4561  .1793       .0299
Si4    .38388 .54418 -.1438       .0193
O1      .5992  .5513 -.0868       .0255
O2      .5464  .5834  .2222        .028
O3      .6837  .6671  .0998        .035
O4      .6158  .3712  .2147        .028
O5      .3445  .5121  .3365       .0339
O6      .5339  .4418  .2033       .0264
O7      .4813  .3134  .3367       .0195
O8      .2544  .3827  .2013       .0302
O9      .3239  .4970  .0022       .0357
O10     .4010  .4477  .1735       .0292
O11     .4601  .5487 -.1112       .0252
O12     .3817  .6229 -.1456        .050
Wat1    .8326  .7871  .2289       .0345
Wat2    .6972  .5293  .2186        .045
Wat3    .4609  .6694  .2128        .058
Wat4    .9668  .6748  .1892        .048