Tridymite
Dollase W A, Baur W H
American Mineralogist 61 (1976) 971-978
The superstructure of meteoritic low tridymite solved by computer simulation
Locality: Steinbach meteorite, Saxony, Germany
_database_code_amcsd 0000531
18.524 5.0032 23.810 90 105.82 90 Cc
atom     x    y     z Biso
Si1  .5507 .541 .5642   .9
Si2  .7036 .947 .7374  1.2
Si3  .4198 .549 .6225   .7
Si4  .5751 .043 .7955  1.1
Si5  .9247 .548 .6971   .8
Si6  .7643 .944 .5386   .9
Si7  .8023 .449 .7661   .8
Si8  .6453 .041 .6027   .7
Si9  .8531 .463 .9016  1.0
Si10 .9493 .966 .9358  1.0
Si11 .7244 .559 .9605   .9
Si12 .5697 .549 .8702  1.1
O1   .5749 .351 .8182  1.2
O2   .5707 .840 .8476  1.5
O3   .7315 .138 .4851  1.8
O4   .7509 .644 .5152  1.7
O5   .4155 .352 .6741  2.9
O6   .4127 .852 .6434  1.9
O7   .8773 .164 .9213  1.8
O8   .9160 .668 .9361  2.4
O9   .7741 .145 .7538  1.8
O10  .7336 .643 .7402  2.2
O11  .6195 .341 .5847  1.2
O12  .5811 .843 .5661  1.9
O13  .4966 .511 .6062  2.7
O14  .3533 .489 .5665  1.0
O15  .6498 .005 .6711  1.8
O16  .6524 .996 .7805  2.0
O17  .8636 .499 .7328  1.8
O18  .8361 .503 .8333  2.6
O19  .5052 .993 .7398  1.8
O20  .6369 .511 .9268  2.9
O21  .9927 .992 .8868  1.4
O22     .5 .468    .5  2.2
O23  .7252 .991 .5898  2.3
O24  .7744 .521 .9155  1.5