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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Дәйексөз келтіру

Толық мәтін

Ашық рұқсат Ашық рұқсат
Рұқсат жабық Рұқсат берілді
Рұқсат жабық Тек жазылушылар үшін

Аннотация

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.

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Авторлар туралы

V. Krut’ko

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

Хат алмасуға жауапты Автор.
Email: kroutko@igic.ras.ru
Ресей, Moscow, 119991

M. Komova

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

Email: kroutko@igic.ras.ru
Ресей, Moscow, 119991

R. Svetogorov

National Research Center “Kurchatov Institute”

Email: kroutko@igic.ras.ru
Ресей, Moscow, 123182

A. Khoroshilov

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

Email: kroutko@igic.ras.ru
Ресей, Moscow, 119991

N. Efimov

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

Email: kroutko@igic.ras.ru
Ресей, Moscow, 119991

E. Ugolkova

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

Email: kroutko@igic.ras.ru
Ресей, Moscow, 119991

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