Abstract: The crystallographic analysis of Rb 2NaAlF 6(Fd(Formula presented.)m) and (Al,V) 4(P 4O 12) 3((Formula presented.)3d) cubic structures and the trigonal structure of phenakite Be 2SiO4 R(Formula presented.) is performed. In Rb 2NaAlF 6 a large and heavy Rb cation stabilizes cation and anion sublattices, promoting their maximum symmetry. In the structure of cyclic tetraphosphate, the core is formed by the cation sublattice with a noticeable deviation of P cations from its nodes. The anion arrangement ordered by pseudo-cubic and hexagonal sublattices with pseudo-symmetry features dominates in the trigonal structure of phenakite.
Предметные области OECD FOS+WOS
- 1.04 ХИМИЧЕСКИЕ НАУКИ