Characterization of Radium Sulphate
Artikel i vetenskaplig tidskrift, 2013

This paper examines the crystal structure of radium sulphate and compares its structure to barium sulphate, strontium sulphate, and lead sulphate. The radium sulphate powder was measured by both powder X-ray diffraction and EXAFS. The unit cell was determined to be orthorhombic, belonging to the Pnma (no. 62) space group with the cell parameters 𝑎 = 9.07A, ˚ 𝑏 = 5.52A, ˚ 𝑐 = 7.28A, and ˚ 𝑉 = 364.48A˚ 3 . These data support the fact that radium sulphate is isostructural with barium, strontium, and lead sulphate. The bond distances were determined using EXAFS. The mean Ra–O and S–O bond distances were found to be 2.96(2)A˚ and 1.485(8)A, respectively, and the Ra–O–S bond angle was ˚ 127(2)∘ . Findings of EXAFS data are quite consistent and support the XRD data. These findings show that it is possible for radium to coprecipitate with barium, strontium, and lead in sulphate media to form a substitutional solid solution.

Författare

Hanna Hedström

Chalmers, Kemi- och bioteknik, Kärnkemi

Chalmers, Kemi- och bioteknik, Industriell materialåtervinning

I. Persson

Gunnar Skarnemark

Chalmers, Kemi- och bioteknik, Kärnkemi

Christian Ekberg

Chalmers, Kemi- och bioteknik, Kärnkemi

Chalmers, Kemi- och bioteknik, Industriell materialåtervinning

Journal of Nuclear Chemistry

2314-4831 (eISSN)

Vol. 2013 Art. no. 940701-

DOI

10.1155/2013/940701