Kostylevite
Ilyukhin V V, Khomyakov A P, Shumyatskaya N G, Voronkov A A, Nevskii N N,
Belov N V
Soviet Physics Doklady 26 (1981) 118-120
The crystal structure of the new natural zirconosilicate K4Zr2Si6O18*2H2O
Locality: Khibinsk massif, Kola Peninsula, Russia
Note: dimorphic with umbite
Note: y(O7) corrected
_database_code_amcsd 0015609
6.565 13.171 11.727 90 90 105.26 P2_1/b
atom     x     y     z Biso
K1   .7950 .0853 .5484 1.78
K2   .6816 .8849 .8831 3.03
Zr   .1223 .2205 .7834  .72
Si1  .8438 .1557 .0275  .68
Si2  .5885 .1513 .8132  .64
Si3  .7909 .0181 .2357  .61
O1   .8037 .2003 .7470 1.06
O2   .0573 .1920 .9536 1.24
O3   .4391 .2298 .8145 1.20
O4   .1649 .3775 .8129 1.12
O5   .1943 .2557 .6115 1.20
O6   .0770 .0636 .7326 1.21
O7   .6372 .1188 .9436 1.41
O8   .8495 .0525 .1024 1.38
O9   .4662 .0376 .7568 1.01
Wat  .4029 .1243 .4927 2.83