Synthesis and crystal structures of new oxyapatites BiCa4-xLax(VO4)(3-x)(GeO4)(x)O, x=1-3 / Zhuravlev V. D.,Tyutyunnik A. P.,Zubkov V. G.,Perelyaeva L. A.,Baklanova I. V.,Blinova A. L. // JOURNAL OF SOLID STATE CHEMISTRY. - 2012. - V. 194, l. . - P. 32-36.

ISSN/EISSN:

0022-4596 / нет данных

Type:

Article

Abstract:

New germanate-vanadates with the general formula BiCa4-xLax(VO4)(3-x)(GeO4)(x)O, x=1-3, have been synthesized by the nitrate-citrate method and characterized. Structural refinement based on X-ray powder diffraction data showed that these compounds are isostructural with BiCa4(VO4)(3)O (space group P6(3)/m (N 176), Z=2, a=9.8327-9.8755(3), and c=7.1203-7.2133(2)). They may be viewed as continuous series of solid solutions where Ca2+ and V5+ cations in the crystal lattice of vanadate BiCa4(VO4)(3)O are replaced by La3+ and Ge4+ cations. In the process of substitution, the La3+ cations occupy mainly the 4f lattice sites of the germanate-vanadate oxyapatites, but the filling of the 4f and 6h lattice sites in the germanate BiCaLa3(GeO4)(3) is equivalent. IR and Raman spectra were studied. The Raman spectra clearly show a two-mode behavior: the lines of GeO4 and VO4 are separated from each other, and the (V/Ge)O-4 tetrahedra exhibit a quasi-independent behavior. (C) 2012 Elsevier Inc. All rights reserved.

Author keywords:

Germanate-vanadates; Oxyapatite; Heterovalent substitution OXIDE-ION CONDUCTIVITY; ELECTRICAL-PROPERTIES; EU3+ LUMINESCENCE; APATITE PHASES; RAMAN-SPECTRA; LANTHANUM; SUBSTITUTIONS; PHOSPHATE; NEODYMIUM; STRONTIUM

DOI:

10.1016/j.jssc.2012.07.042

Web of Science ID:

ISI:000308896400006

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	OCT
Publisher	ACADEMIC PRESS INC ELSEVIER SCIENCE
Address	525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
Language	English
Keywords-Plus	OXIDE-ION CONDUCTIVITY; ELECTRICAL-PROPERTIES; EU3+ LUMINESCENCE; APATITE PHASES; RAMAN-SPECTRA; LANTHANUM; SUBSTITUTIONS; PHOSPHATE; NEODYMIUM; STRONTIUM
Research-Areas	Chemistry
Web-of-Science-Categories	Chemistry, Inorganic \& Nuclear; Chemistry, Physical
Author-Email	zhvd@ihim.uran.ru
ResearcherID-Numbers	Tyutyunnik, Alexander/P-2230-2015
Funding-Acknowledgement	Ural Branch, Russian Academy of Sciences {[}12-T-3-1003]
Funding-Text	The financial support from the Ural Branch, Russian Academy of Sciences (grant No. 12-T-3-1003) is gratefully acknowledged.
Number-of-Cited-References	31
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	25
Journal-ISO	J. Solid State Chem.
Doc-Delivery-Number	007NW