On the nature and quantitative content of water in aqueous phosphates of rare earths elements with the structure of rhabdofan

Novikov, M.P.; Gorbachev, P.N.

Авторы: Novikov M.P., Gorbachev P.N.
Журнал: Experiment in GeoSciences
Том: 29
Номер: 1
Год издания: 2023
Первая страница: 99
Последняя страница: 101
Аннотация: In this work, we studied the physico-chemicalproperties of compounds of aqueous rare earthphosphates, the study of which is associated with theknown difficulties of their very rare distribution in nature.Phosphates of the morphotropic series of syntheticanalogues of rhabdofan are the main object of study.So far, for aqueous rare-earth phosphates with therhabdophane structure, there are no consistent data on theform of water incorporation, its content, and, as a result,the generally accepted writing of the chemical formula.Based on the structural features of hydrated phosphates ofthe cerium subgroup, it is customary to consider the zeolitetype of water for compounds with a hexagonal structure(Mooney R.C.L.J., 1950). Therefore, in accordance with thestructure, the content of the latter should be 1.5 H2Omolecules per unit cell, or 0.5 mol per formula unit.However, according to many researchers, the amount ofwater of hydration for phosphates of this type is attributedto the most varied, from 1.5 to n H2O mol (Ulyanov,Kazakova, 1963; Tananaev, Vasilyeva, 1963; Kozlova,2020; A. Shelyug, 2018).The reason for such large discrepancies in the H2Ocontents, as well as the nature of its occurrence, lies,according to our data, in different degrees of crystallinity ofsynthetic samples. Considering the latter, the degree ofcrystallinity of synthetic samples was studied depending onvarious experimental conditions: pH (0.5–6)),concentration of components and water content in theobtained samples).
Добавил в систему: Горбачев Павел Николаевич

	ИСТИНА	Войти в систему Регистрация
	Интеллектуальная Система Тематического Исследования НАукометрических данных
	Главная Поиск Статистика О проекте Помощь

ИСТИНА

Интеллектуальная Система Тематического Исследования НАукометрических данных

On the nature and quantitative content of water in aqueous phosphates of rare earths elements with the structure of rhabdofanстатья

Прикрепленные файлы