Danburite Sugiyama K, Takeuchi Y Zeitschrift fur Kristallographie 173 (1985) 293-304 Unusual thermal expansion of a B-O bond in the structure of danburite CaB2Si2O8 Locality: Toroku mine, Miyazaki Prefecture, Japan Note: AnisoB's from ICSD Sample: T = 25 C _database_code_amcsd 0010946 8.037 8.757 7.7218 90 90 90 Pnam atom x y z Biso B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) Ca .38555 .07648 .25 .514 .00231 .00156 .00195 .00006 0 0 B .2589 .4192 .4206 .426 .00175 .00149 .00153 -.00005 -.00002 -.00006 Si .05333 .19250 -.05574 .295 .00134 .00092 .00107 -.00002 .00002 -.00004 O1 .19291 .06797 -.00324 .599 .00248 .00138 .00307 .00070 -.00073 -.00044 O2 .12632 .36496 -.04233 .498 .00222 .00123 .00229 -.00040 -.00076 .00008 O3 .39965 .31351 .07820 .490 .00179 .00188 .00181 .00045 .00049 .00020 O4 .5137 .6640 .25 .610 .00294 .00269 .00103 .00070 0 0 O5 .1838 .4282 .25 .590 .00177 .00324 .00134 .00051 0 0