A comparative crystallochemical analysis of binary compounds and simple anhydrous salts containing pyramidal anions LO₃ (L = S, Se, Te, Cl, Br, I)

A comparative analysis of binary compounds and 61 simple anhydrous salts M_y(LO₃)_z (L = S, Se, Te, Cl, Br, I) was performed using the crystallochemical program package TOPOS. A topological similarity was found between the salts and six types of binary compounds (NaCl, NiAs, PoCl₂, Tl₂S₂, ZnTe, rutile). It is notable that these structure relationships are typical for other groups of inorganic salts: borates, carbonates, nitrates, orthophosphates, orthoarsenates, sulfates, selenates, perchlorates, molybdates and halogenides of d-metals. For all the M_y(LO₃)_z compounds the topology and uniformity of the ion arrays were investigated. It has been established that in 36 out of the 61 salts at least one ion array has the topology of close packing or the body-centred cubic lattice. The results obtained have allowed us to come to conclusions about the structure-forming role of the arrays of various chemical composition.