Citation: Radaev, S. F.; Muradyan, L. A.; Simonov, V. I. (1991). Atomic structure and crystal chemistry of sillenites: Bi12(Bi3+0.50Fe3+0.50)O19.50 and Bi12(Bi3+0.50Fe3+0.50)O19.33 Note: anisoB's from ICSD. Acta Crystallographica, Section B, 47, pp. 1-6.