Studies on the uranium speciation in zinc iron phosphate (ZnIP) glass using Mössbauer and EXAFS spectroscopic investigations. Issue 13 (1st July 2021)

• Record Type: Journal Article
• Authors: Praveena, N.; Jena, Hrudananda; Kumar, Ravi; Jha, S.N.; Bhattacharyya, D.; Meena, Sher Singh
• Is Part Of: Ceramics international. Volume 47:Issue 13(2021)
• Page Start: 18323
• Page End: 18329
• Publication Date: 2021-07-01
• Subjects: Zinc iron phosphate glass -- Nuclear waste -- X-ray absorption spectroscopy -- X-ray diffraction -- Mössbauer spectroscopy -- Uranium speciation; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2021.03.153
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: 5–15 mol % UO3 loaded zinc iron phosphate glass was prepared by melt quench process. The solubility of UO3 in ZnIP was determined by XRD and was found to be below 15 mol %; beyond which separation of UP2 O7 compound was observed. Mössbauer spectroscopy unraveled the ratio of Fe (II)/Fe(III) and was found to decrease from 0.071 (ZnIP) to 0.029. EXAFS studies unraveled the prevalence of two type of coordination for U–O (i.e U–O1 and UO2 ) and Fe–O (Fe–O1 and Fe–O2 ) in the ZnIP glass matrix, whereas a single chemical environment for Zn–O in the same glass matrix.