Synthesis and characterization of sodium and potassium uranates with the compositions Na2[(UO2)6O4(OH)6] · 8H2 and K2[(UO2)6O4(OH)6] · 8H2


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Abstract

Sodium and potassium uranates with the compositions M2[(UO2)6O4(OH)6] · 8Н2 (M = Na, K) have been synthesized by reacting schoepite (UO3 · 2.25H2O) with aqueous sodium hydroxide and potassium hydroxide solutions (pH 10–12) under hydrothermal conditions at 100°C for 15 days. Chemical analysis, X-ray diffraction, IR spectroscopy, and thermogravimetry data demonstrate that these compounds are perfect compositional and crystallographic analogs.

About the authors

O. V. Nipruk

Lobachevsky State University

Author for correspondence.
Email: nipruk@yandex.ru
Russian Federation, pr. Gagarina 23a, Nizhny Novgorod, 603950

G. N. Chernorukov

Lobachevsky State University

Email: nipruk@yandex.ru
Russian Federation, pr. Gagarina 23a, Nizhny Novgorod, 603950

R. V. Abrazheev

Lobachevsky State University

Email: nipruk@yandex.ru
Russian Federation, pr. Gagarina 23a, Nizhny Novgorod, 603950

E. L. Kostrova

Lobachevsky State University

Email: nipruk@yandex.ru
Russian Federation, pr. Gagarina 23a, Nizhny Novgorod, 603950

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