9Al2O3.2B2O3 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: Rietveld refinement of AgB2 _database_code_amcsd 0006430 7.6942 15.0110 5.6689 90 90 90 A2_1am atom x y z occ Biso B .722 .0256 0 .33 Al1 .5 .3825 .2455 .98 .35 B1 .5 .3825 .2455 .02 .35 Al2 .6886 .2445 .5 .98 .41 B2 .6886 .2445 .5 .02 .41 Al3 .6830 .0554 .5 .98 .37 B3 .6830 .0554 .5 .02 .37 Al4 .8337 .2955 0 .98 .37 B4 .8337 .2955 0 .02 .37 O1 .7853 .0504 .2116 .58 O2 .7013 .3056 .2447 .48 O3 .5367 .1517 .5 .53 O4 .9357 .1910 0 .40 O5 .8753 .1711 .5 .57 O6 .5721 .4573 0 .57 O7 .5927 .4523 .5 .43