Rietveld Refinement Strategy of CaTa4-xNbxO11 Solid Solutions Using GSAS-EXPGUI Software Package

Fadhlina Che Ros

doi:10.4028/www.scientific.net/MSF.888.167

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HomeMaterials Science ForumMaterials Science Forum Vol. 888Rietveld Refinement Strategy of CaTa4-xNbxO11...

Rietveld Refinement Strategy of CaTa_4-xNb_xO₁₁ Solid Solutions Using GSAS-EXPGUI Software Package

Abstract:

Crystal structures of CaTa_4-xNb_xO₁₁ solid solutions (x = 0, 1 and 2) in space group P6₃22, have been refined by application of the Rietveld method X-ray powder diffraction profile. Refinement were carried out using GSAS software and EXPGUI interface. The unit cell parameters and cell volume increase with increasing Nb content; all samples contain random distribution of Ta/Nb. Strategy and procedures for CaTa_4-xNb_xO₁₁ solid solutions refinement are reported. The structure consists of layers of tantalum-oxygen bipyramids sharing-edges alternating with layers of octahedra.

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Periodical:

Materials Science Forum (Volume 888)

Pages:

167-171

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.888.167

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Online since:

March 2017

Authors:

Fadhlina Che Ros*

Keywords:

CaTa₄O₁₁ Solid Solutions, GSAS-EXPGUI, Rietveld Refinement

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