Cristobalite Pluth J J, Smith J V, Faber J Journal of Applied Physics 57 (1985) 1045-1049 Crystal structure of low cristobalite at 10, 293, and 473 K: Variation of framework geometry with temperature Sample: T = 473 K Locality: synthetic _database_code_amcsd 0012930 4.9877 4.9877 6.9697 90 90 90 P4_12_12 atom x y z B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) Si .2949 .2949 0 .0139 .0139 .0077 .0000 -.0006 .0006 O .2416 .0968 .1747 .0466 .0106 .0128 -.0022 .0089 .0052