Rangarira ndima iri pasi apa uye ipapo pindura mubvunzo gare gare mumutauro mumwe chetewo sechikamu:  Passage: α-BiF3 ine cubic crystalline chimiro (Pearson chiratidzo cF16, nzvimbo boka Fm-3m, No. 225). BiF3 ndiyo prototype ye DO3 chimiro, iyo inogamuchirwa neanoverengeka intermetallics, kusanganisira Mg3Pr, Cu3Sb, Fe3Si, uye AlFe3, pamwe ne hydride LaH3.0. Unit cell iri face centered cubic ne Bi pa face centers ne vertices, ne F pa octahedral site (mid-edges, center), ne tetrahedral sites (centers of the 8 sub cubes) - nokudaro primitive cell ine 4 Bi ne 12 F. Alternatively, ne unit cell yakachinjwa (1/4,1/4,1/4) tsananguro inogona kuva ye fcc cell ine face, edge, corner, ne centers dzakazadzwa ne F, nehafu (4 of) ye octant centers ne F, imwe hafu ne Bi (each octant type tetrahedrally arranged). Kureba kwemupendero wesero reBiF3 i0.5853 nm.β-BiF3 ine chimiro cheYF3 apo atomu yebismuth ine kururamisa kurongeka kwe9, tricaped trigonal prism. Chimiro ichi chinowanzoonekwa sechinonzi ionic, uye chinopesana ne fluorides yemitezo yakareruka yeboka 15, phosphorus trifluoride, PF3, arsenic trifluoride, AsF3 uye antimony trifluoride, SbF3, uko MX3 mamorekuru aripo mune yakasimba.  Mubvunzo: Chii chinonzi chiratidzo chaPearson chechimiro checubic crystalline?
cF16