Citation: Garsche, M.; Tillmanns, E.; Almen, H.; Schneider, H.; Kupcik, V. (1991). Incorporation of chromium into aluminium borate 9Al2O3*2B2O3 (A9B2) Sample: Single crystal structure refinement of AgB2+Cr. European Journal of Mineralogy, 3, pp. 793-808.