DBPapers
DOI: 10.5593/sgem2012/s01.v1042

THE RIETVELD STRUCTURE REFINEMENT OF THE BARITE CRYSTALS FROM SOMOVA (ROMANIA) USING X-RAY POWDER DIFFRACTION DATA

G. ADRIAN BRANOIU
Wednesday 1 August 2012 by Libadmin2012

References: 12th International Multidisciplinary Scientific GeoConference, www.sgem.org, SGEM2012 Conference Proceedings/ ISSN 1314-2704, June 17-23, 2012, Vol. 1, 357 - 362 pp

ABSTRACT

The crystal structure of barite from Somova (Dobrogea district, Romania) has been
refined to Rwp and GOF indices of 1.914 and 1.14%, respectively, using X-Ray powder
diffraction data and the Rietveld method. The Rietveld refinements were carried out
using the computer program Diffracplus TOPAS 4.1 (Bruker AXS). Pseudo-Voigt (pV)
profile function was used for the fit of the peaks. Rietveld refinement using X-Ray
powder diffraction data of barite sample in space group Pnma (No.62), a=8.824Å,
b=5.476Å, c=7.139Å, Z=4, confirm the basic barite structure.

Keywords: crystalline structure, Pb-content in barite, X-ray powder diffraction,
Rietveld refinement

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