Тип публикации: статья из журнала
Год издания: 2025
Идентификатор DOI: 10.1007/s11015-025-01942-3
Ключевые слова: Bi2Ge2O7, crystalline structure, Metastable compound, melt crystallization, bismuth germanate
Аннотация: The paper reports on the crystalline structure of a new metastable compound (Bi2Ge2O7) found in the Bi2O3–GeO2 system. This new phase was synthesized from powders by slow cooling of the melt in a platinum container from 1125 °C. The X‑ray diffraction analysis was used to determine the monoclinic lattice parameters of the crystallinПоказать полностьюe structure (a = 14.81691(4) Å, b = 5.28586(1) Å, c = 9.45669(4) Å, β = 124.4766(2) deg., V = 610.560(3) Å3) and space group C2/c. The sample also contains a small admixture of α‑quartz-type GeO2 (up to 2 wt. %), which could not be removed at this stage of research. Scanning electron microscopy and energy dispersive analysis revealed that the synthesized samples consist of Bi2Ge2O7 plates and Bi2Ge2O7+GeO2 mixture, which is formed along the plate boundaries. The ratio of the initial components (32:68 mol. %) is the most optimal, as it allows obtaining the minimum content of impurity phase (GeO2).
Журнал: Metallurgist
Выпуск журнала: Т. 69, № 2
Номера страниц: 282-290
ISSN журнала: 00260894
Место издания: Москва
Издатель: Springer New York Consultants Bureau