Raman spectroscopic study of the uranyl carbonate mineral čejkaite and its comparison with synthetic trigonal Na4[UO2(CO3)3]
✍ Scribed by Jiří Čejka; Jiří Sejkora; Jakub Plášil; Silmarilly Bahfenne; Sara J. Palmer; Ray L. Frost
- Publisher
- John Wiley and Sons
- Year
- 2009
- Tongue
- English
- Weight
- 207 KB
- Volume
- 41
- Category
- Article
- ISSN
- 0377-0486
- DOI
- 10.1002/jrs.2349
No coin nor oath required. For personal study only.
✦ Synopsis
Raman and infrared spectroscopies were used to characterise two samples of triclinic čejkaite Na 4 [UO 2 (CO 3 ) 3 ] and its synthetic trigonal analogue. The ν 3 (UO 2 ) 2+ mode is not Raman active, whereas both the ν 3 and ν 1 (UO 2 ) 2+ modes are infrared active. U-O bond lengths in uranyls were calculated from the spectra obtained and compared with bond lengths derived from crystal structure analyses. From the higher number of bands related to the uranyl and carbonate vibrations, the presence of symmetrically distinct (UO 2 ) 2+ and (CO 3 ) 2-units in both structures is proposed.