Features of the Structure and Thermal Properties of LnBWO6 (La = Ln, La0.999Nd0.001, La0.99Gd0.01) Synthesized by the Sol-Gel Method

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Borate tungstates LnBWO6 (Ln = La, La0.999Nd0.001, La0.99Gd0.01) were synthesized by the Pechini method with subsequent annealing of intermediates. They were analyzed by X-ray diffraction (XRD) and DSC methods. Crystallographic parameters of synthesized LnBWO6 were refined by powder X-ray diffraction in two systems: monoclinic, space group P21, and orthorhombic, space group P222. The presence of reversible first-order phase transitions in synthesized LnBWO6 was detected using the DSC method, and the temperatures and enthalpies of phase transformations were determined. It has been shown that Nd3+ and Gd3+ dopants lowers the L- → H- phase transition temperature of LaBWO6. According to experimental electron paramagnetic resonance (EPR) data gadolinium has two independent positions in the La0.99Gd0.01BWO6 structure.

作者简介

V. Krut’ko

Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences

编辑信件的主要联系方式.
Email: kroutko@igic.ras.ru
俄罗斯联邦, Moscow, 119991

M. Komova

Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences

Email: kroutko@igic.ras.ru
俄罗斯联邦, Moscow, 119991

R. Svetogorov

National Research Center “Kurchatov Institute”

Email: kroutko@igic.ras.ru
俄罗斯联邦, Moscow, 123182

A. Khoroshilov

Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences

Email: kroutko@igic.ras.ru
俄罗斯联邦, Moscow, 119991

N. Efimov

Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences

Email: kroutko@igic.ras.ru
俄罗斯联邦, Moscow, 119991

E. Ugolkova

Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences

Email: kroutko@igic.ras.ru
俄罗斯联邦, Moscow, 119991

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