Rịba ama amaokwu a dị n'okpuru ma zaa ajụjụ ahụ mgbe e mesịrị n'otu asụsụ ahụ dị ka amaokwu ahụ:  Passage: α-BiF3 nwere cubic crystalline Ọdịdị (Pearson akara cF16, ohere otu Fm-3m, No. 225). BiF3 bụ ihe atụ maka DO3 Ọdịdị, nke ọtụtụ intermetallics nakweere, gụnyere Mg3Pr, Cu3Sb, Fe3Si, na AlFe3, yana hydride LaH3.0. Mkpụrụ ndụ unit bụ ihu na-elekwasị anya na cubic na Bi na etiti ihu na vertices, na F na saịtị octahedral (etiti-n'ọnụ, etiti), na saịtị tetrahedral (etiti nke 8 sub cubes) - yabụ na cell mbụ nwere 4 Bi na 12 F. N'aka nke ọzọ, na mkpụrụ ndụ unit gbanwere (1/4,1/4,1/4) nkọwa ahụ nwere ike ịbụ nke fcc cell na ihu, ọnụ, nkuku, na etiti jupụtara na F, na ọkara (4 nke) ebe etiti octant na F, ọkara nke ọzọ na Bi (ụdị octant ọ bụla kwadebere tetrahedrally). Ogologo ọnụ nke mkpụrụ ndụ BiF3 bụ 0.5853 nm.β-BiF3 nwere usoro YF3 ebe bismuth atom mebiri 9 nhazi, tricaped trigonal prism. A na-ewere usoro a ka ọ bụrụ ionic, ma na-emegide fluorides nke ndị òtù dị mfe nke ìgwè 15, phosphorus trifluoride, PF3, arsenic trifluoride, AsF3 na antimony trifluoride, SbF3, ebe MX3 mkpụrụ ndụ ihe nketa dị na ihe siri ike.  Ajụjụ: Gịnị bụ Pearson akara maka cubic crystalline Ọdịdị?
cF16