Terskite
Pudovkina Z V, Chernitsova N M
Doklady Akademii Nauk SSSR 316 (1991) 645-649
Crystal structure of terskite Na4Zr[H4Si6O18]
_database_code_amcsd 0012483
14.195 14.750 7.511 90 90 90 Pnc2
atom     x     y     z Biso
Na1  .7554 .9976  .525  .82
Na2  .2167 .2369  .970 1.90
Na3      0     0  .905  .99
Na4     .5     0  .056 1.39
Na5  .7066 .2273  .016 1.40
Zr   .2537 .9974 .0002 1.08
Si1  .5853 .1310 .7553  .86
Si2  .3881 .1387 .3001  .76
Si3  .3668 .1538 .7140  .64
Si4  .8672 .1533 .2865  .71
Si5  .8901 .1382 .6984  .62
Si6  .0835 .1316 .2456  .81
O1    .499  .129  .298 1.31
O2    .470  .123  .789 1.42
O3    .853  .132  .492 1.23
O4    .350  .129  .503  .91
O5    .349  .237  .242  .71
O6    .854  .237  .785 1.19
O7    .115  .262  .719  .93
O8    .286  .106  .822 1.13
O9    .335  .060  .191  .96
O10   .785  .101  .170  .70
O11   .835  .057  .805  .99
O12   .971  .124  .221 1.08
O13   .003  .132  .720 1.02
O14   .614  .237  .742  .90
O15   .636  .075  .911 1.15
O16   .612  .088  .550 1.37
O17   .134  .080  .084 1.17
O18   .117  .092  .427 1.55