Crystal structure of radium sulfate: An X-ray powder diffraction and density functional theory study
Artikel i vetenskaplig tidskrift, 2017

Radium-barium sulfate (Ra0.76Ba0.24SO4) powder was examined using X-ray Diffraction (XRD) technique and its crystal structure was optimized using Density Functional Theory (DFT). XRD data show that radium and barium sulfate form a solid solution and that Ra0.76Ba0.24SO4 is orthorhombic and isostructural with pure RaSO4, barite (BaSO4), celestite (SrSO4) and anglesite (PbSO4), crystallizing in the space group Pmna (No. 62). The unit cell parameters of the Ra0.76Ba0.24SO4 crystal have been determined using Rietveld refinement and were extrapolated to unit cell parameters of the pure RaSO4 phase using Vegard's law: a=9.129(8), b=5.538(3), c=7.313(5) Å. DFT geometry optimization was used to derive atomic coordinates and interatomic distances in both Ra0.76Ba0.24SO4 and pure RaSO4. The experimental and DFT geometry optimization results obtained in this work are in good agreement with each other, and furthermore with literature data.

Alkaline-earth metals

X-ray diffraction

Co-precipitation

Radium sulfate

RaSO4

Författare

Artem Matyskin

Chalmers, Kemi och kemiteknik, Energi och material, Kärnkemi

Industriell materialåtervinning

Rikard Ylmén

Chalmers, Kemi och kemiteknik, Energi och material, Kärnkemi

Industriell materialåtervinning

Petra Lagerkvist

Totalförsvarets forskningsinstitut (FOI)

Henrik Ramebäck

Chalmers, Kemi och kemiteknik, Energi och material, Kärnkemi

Christian Ekberg

Chalmers, Kemi och kemiteknik, Energi och material, Kärnkemi

Industriell materialåtervinning

Journal of Solid State Chemistry

0022-4596 (ISSN) 1095-726X (eISSN)

Vol. 253 15-20

Ämneskategorier

Oorganisk kemi

Geokemi

Miljövetenskap

Drivkrafter

Hållbar utveckling

Styrkeområden

Energi

Fundament

Grundläggande vetenskaper

DOI

10.1016/j.jssc.2017.05.024

Mer information

Senast uppdaterat

2018-02-27