Mullite
Fischer R X, Schmucker M, Angerer P, Schneider H
American Mineralogist 86 (2001) 1513-1518
Crystal structures of Na and K aluminate mullites
Sample: K
_database_code_amcsd 0002750
7.6934 7.6727 2.93231 90 90 90 Pbam
atom     x     y   z   occ Biso
K        0   1/2 1/2  .335  2.7
Al1      0     0   0       1.02
AlT  .1543 .3300 1/2 .6675  .82
AlT* .2678 .1918 1/2 .3325  0.9
Oab  .3622 .4178 1/2       1.50
Oc*  .4412 .0525 1/2 .3325  0.4
Od   .1346 .2078   0        1.2