Synthesis of the Tl0.64Sr1.5La0.5CoO5-epsilon phase with a 1201 structure / Kirpishchikova TA,Doumerc JP,Neiman AY // RUSSIAN JOURNAL OF INORGANIC CHEMISTRY. - 2000. - V. 45, l. 5. - P. 678-684.

ISSN/EISSN:

0036-0236 / нет данных

Type:

Article

Abstract:

The procedure for preparing complex Tl-La-Sr cobaltites by reacting the La2-xSrxCoO4-y precursors with Tl2O3 in a sealed gold ampule at 890 degrees C was elaborated. The phase Tl0.64Sr1.5La0.5CoO5-epsilon Was prepared, and its structure and bulk and surface compositions were studied. The phase is tetragonal with the unit cell parameters a = 3.781 Angstrom and c = 8.697 Angstrom. Some specific features of the mechanism of the cobaltite synthesis (the reaction occurs at the three-phase interface, low stability of the ultimate and intermediate products, the tendency of thallium oxides toward surface segregation) were found to be responsible for kinetic hindrances at the final stages of the synthesis and for the occurrence of small impurities of extraneous phases. Possible modes of accommodation of the complex cobaltite structure at a considerable deviation from the thallium stoichiometry are discussed.

Author keywords:

COBALTITE; TLSR2COO5; OXIDES; BA

DOI:

нет данных

Web of Science ID:

ISI:000088988600002

Соавторы в МНС:

—

Другие поля

Поле	Значение
Month	MAY
Publisher	INTERPERIODICA
Address	PO BOX 1831, BIRMINGHAM, AL 35201-1831 USA
Language	English
Keywords-Plus	COBALTITE; TLSR2COO5; OXIDES; BA
Research-Areas	Chemistry
Web-of-Science-Categories	Chemistry, Inorganic \& Nuclear
Number-of-Cited-References	19
Journal-ISO	Russ. J. Inorg. Chem.
Doc-Delivery-Number	348MM