Synthesis, crystal structure, and ionic conductivity of Tl2Ta2(PO4)(2)(HP5O16)статья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:Tl2Ta2(PO4)(2)(HP5O16) is synthesized at 400degreesC in molten polyphosphoric acids containing Tl, Ta, and P in the ratio 4:1:15, and its crystal structure is determined: monoclinic cell, a=5.1469 Angstrom, b=18.451 Angstrom, c=10.793 Angstrom, beta=95.65degrees, Z=2, sp. gr. P2(1)/m. The framework of the structure is made up of monophosphate and hydrogen pentaphosphate groups which share corners with TaO6 octahedra. The Tl atoms reside in infinite channels. Neighboring pentaphosphate groups are hydrogen-bonded. In the range 60-350degreesC, the compound has a rather high ionic conductivity, which is tentatively attributed to proton transport. The activation energy of conduction is 48+/-1 kJ/mol.