Flexible Frameworks and Physical Properties of Compounds with Transition Metals, Derived from Ellenbergerite and β-Tridymiteстатья
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Дата последнего поиска статьи во внешних источниках: 9 апреля 2021 г.
Аннотация:The specific features of crystal chemistry and physical properties of phosphates (arsenates, vanadates) of alkali and transition metals, crystallized as derivatives of minerals ellenbergerite(Mg,Ti,Zr, )2Mg6(A1,Mg)6(Si,P)2Si6O28(OH)10 and β-tridymite SiO2, have been analyzed in the aspect offlexibility of their radically different frameworks. The crystal chemical function of cations of transition metalsin the structures of ellenbergerite- and tridymite-like analogs has been discussed. The data on their formationmethods and thermodynamic and electrical properties are given. The reasons for the structural differences oftridymite-like phases and the relationship between the polymorphism and variations in the coordinationpolyhedra of transition metals, tending to the most stable configuration, have been investigated.