Aluminium Borate Garsche M, Tillmanns E, Almen H, Schneider H, Kupcik V European Journal of Mineralogy 3 (1991) 793-808 Incorporation of chromium into aluminium borate 9Al2O3*2B2O3 (A9B2) Sample: Single crystal structure refinement of AgB2+Cr _database_code_amcsd 0006431 7.71 15.07 5.70 90 90 90 A2_1am atom x y z occ Biso B .726 .0160 0 .66 Al1 .5 .3837 .2481 .90 .45 Cr1 .5 .3837 .2481 .08 .45 B1 .5 .3837 .2481 .02 .45 Al2 .6877 .2447 .5 .62 Al3 .6849 .0563 .5 .33 Al4 .8353 .2970 0 .38 O1 .785 .0483 .211 .78 O2 .705 .3100 .244 .65 O3 .537 .1495 .5 .78 O4 .937 .1926 0 .68 O5 .869 .1702 .5 .74 O6 .573 .4554 0 .48 O7 .599 .4537 .5 .64