Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: α-BiF3 yana da tsarin lu'ulu'u na cubic (alamar Pearson cF16, rukunin sararin samaniya Fm-3m, No. 225). BiF3 shine samfurin don tsarin DO3, wanda aka karɓa ta hanyar intermetallics da yawa, gami da Mg3Pr, Cu3Sb, Fe3Si, da AlFe3, da kuma hydride LaH3.0. Kwayar naúrar tana da kusurwa mai fuska tare da Bi a cibiyoyin fuska da kololuwa, da F a wurin octahedral (tsakiyar gefuna, tsakiya), da kuma wuraren tetrahedral (cibiyoyin ƙananan cubes 8) - don haka ƙwallon farko ya ƙunshi 4 Bi da 12 F. A madadin haka, tare da rukunin tantanin halitta (1/4,1/4,1/4) bayanin zai iya zama na fcc cell tare da fuska, gefen, kusurwa, da cibiyoyin da aka cika da F, da rabi (4 na) cibiyoyin octant tare da F, sauran rabin tare da Bi (kowane nau'in octant an shirya shi da tetrahedrally). Tsawon gefen kwayar BiF3 shine 0.5853 nm.β-BiF3 yana da tsarin YF3 inda kwayar bismuth ta gurbata haɗin kai na 9, prism mai sau uku. Wannan tsarin ana ɗaukarsa a matsayin ionic, kuma ya bambanta da fluorides na membobin haske na rukunin 15, phosphorus trifluoride, PF3, arsenic trifluoride, AsF3 da antimony trifluoride, SbF3, inda MX3 raka'a kwayoyin halitta suke a cikin daskararre.  Tambaya: Mene ne alamar Pearson don tsarin gine-gine na cubic?
cF16