Rangarira ndima iri pasi apa uye ipapo pindura mubvunzo gare gare mumutauro mumwe chetewo sechikamu:  Passage: Pyridine crystallizes mune orthorhombic crystal system ine nzvimbo yeboka Pna21 uye lattice parameters a = 1752 pm, b = 897 pm, c = 1135 pm, uye 16 formula units per unit cell (yakayerwa pa 153 K). Nokuenzanisa, crystalline benzene inonziwo orthorhombic, ine nzvimbo yeboka Pbca, a = 729.2 pm, b = 947.1 pm, c = 674.2 pm (pa 78 K), asi nhamba yemamolekyuli pasero ndeye 4 chete. Musiyano uyu unobatanidzwa nechikamu chakaderera che pyridine molecule (C2v vs D6h ye benzene). A trihydrate (pyridine·3H2O) inozivikanwa; iyo inocherawo mu orthorhombic system muboka renzvimbo Pbca, lattice parameter a = 1244 pm, b = 1783 pm, c = 679 pm uye masere mafomula mayuniti pauniti sero (yakayerwa pa223 K).  Mubvunzo: Zvikamu zvina zvemvura zvingani zviri muchitokisi chimwe nechimwe?
masere