Тип публикации: статья из журнала
Год издания: 2021
Идентификатор DOI: 10.1134/S0020168521110030
Ключевые слова: apatites, lead europium germanatovanadates, x-ray diffraction, structure, luminescence, high-temperature heat capacity
Аннотация: Pb10 -xEux(GeO4)(2 +x)(VO4)(4 -x) (x = 0.1, 0.2, 0.3) Eu-substituted lead germanatovanadates with the apatite structure have been prepared by solid-state reactions, via firing in air in the temperature range 773-1073 K, using oxides (PbO, Eu2O3, GeO2, and V2O5) as starting materials. Using X-ray diffraction, we have determined the hexagonal cell parameters (sp. gr. P6(3)/m) of the synthesized phases and refined their crystal structure (the atomic position coordinates, isotropic thermal parameters, and principal bond lengths in their structure are presented). We have measured the luminescence spectra of the Pb10 -xEux(GeO4)(2 +x)(VO4)(4 -x) (x = 0.1, 0.2, 0.3) apatites and shown that europium concentration has little effect on the shape of the luminescence spectra. Using experimental heat capacity data obtained for polycrystalline samples by differential scanning calorimetry in the temperature range 350-1050 K, we calculated the main thermodynamic functions of the Eu-substituted lead germanatovanadates.
Издание
Журнал: INORGANIC MATERIALS
Выпуск журнала: Vol. 57, Is. 11
Номера страниц: 1158-1166
ISSN журнала: 00201685
Место издания: NEW YORK
Издатель: MAIK NAUKA/INTERPERIODICA/SPRINGER
Персоны
- Denisova L.T. (Siberian Fed Univ, Krasnoyarsk 660041, Russia)
- Molokeev M.S. (Siberian Fed Univ, Krasnoyarsk 660041, Russia; Russian Acad Sci, Krasnoyarsk Sci Ctr, Kirensky Inst Phys, Siberian Branch,Fed Res Ctr, Krasnoyarsk 660036, Russia)
- Aleksandrovskii A.S. (Siberian Fed Univ, Krasnoyarsk 660041, Russia; Russian Acad Sci, Krasnoyarsk Sci Ctr, Kirensky Inst Phys, Siberian Branch,Fed Res Ctr, Krasnoyarsk 660036, Russia)
- Kargin Yu F. (Russian Acad Sci, Baikov Inst Met & Mat Sci, Moscow 119334, Russia)
- Golubeva E.O. (Siberian Fed Univ, Krasnoyarsk 660041, Russia)
- Denisov V.M. (Siberian Fed Univ, Krasnoyarsk 660041, Russia)
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