Sillimanite
Yang H, Hazen R M, Finger L W, Prewitt C T, Downs R T
Physics and Chemistry of Minerals 25 (1997) 39-47
Compressibility and crystal structure of sillimanite, Al2SiO5, at high pressure
Sample: P = 2.54 GPa
_database_code_amcsd 0008109
7.4537 7.6238 5.7560 90 90 90 Pbnm
atom     x     y     z Biso
Al1      0     0     0  .31
Al2  .1411 .3437   .25  .38
Si   .1541 .3395   .75  .44
OA   .3618 .4062   .75  .59
OB   .3557 .4336   .25  .39
OC   .4748 .0021   .75  .81
OD   .1262 .2219 .5141  .56