Synthesis and Properties of Calcium, Strontium, and Barium Uranates

• Published in: Russian journal of general chemistry Vol. 89; no. 1; pp. 71 - 75
• Main Authors: Chernorukov, N. G., Nipruk, O. V., Chernorukov, G. N., Abrazheev, R. V., Chaplieva, K. A.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 2019; Springer; Springer Nature B.V
• Subjects: Aqueous solutions; Barium; Calcium compounds; Chemical analysis; Chemistry; Chemistry and Materials Science; Chemistry/Food Science; Dehydration; Diffraction; Fluorescence spectroscopy; Infrared analysis; Infrared spectroscopy; Nitrates; Nonferrous metals; Nuclear energy; Nuclear fuel cycle; Nuclear industry; Organic chemistry; Radioactive wastes; Strontium; Thermal decomposition; Thermogravimetric analysis; X ray fluorescence analysis; X ray powder diffraction; X-ray spectroscopy; X-rays; calcium; thermal decomposition; strontium; X-ray powder diffraction; barium; uranates; dehydration
• ISSN: 1070-3632; 1608-3350
• DOI: 10.1134/S1070363219010134

Pure crystalline compounds M II U 3 O 10 · n H 2 O (MII = Ca, Sr) and BaU 2 O 7 · 3 H 2 O were obtained by reactions of synthetic schoepite (UO 3 · 2.25 H 2 O) with aqueous solutions of calcium, strontium, and barium nitrates under hydrothermal conditions at 200°C and pH 7‒8. Their structure, dehydration, and thermal decomposition were studied by chemical analysis, X-ray fluorescence spectrometry, X-ray powder diffraction, IR spectroscopy, and thermogravimetric analysis.