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Quantitative XRD Analysis of Advanced Coal Combustion Solid Residuals by the RIR Method

Published online by Cambridge University Press:  06 March 2019

J.A. Bender ,
J.K. Solem ,
G.J. McCarthy ,
M.C. Oseto  and
J.E. Knell
J.A. Bender
Affiliation:
Department of Chemistry, North Dakota State University, Fargo, North Dakota 58105
J.K. Solem
Affiliation:
Department of Chemistry, North Dakota State University, Fargo, North Dakota 58105
G.J. McCarthy
Affiliation:
Department of Chemistry, North Dakota State University, Fargo, North Dakota 58105
M.C. Oseto
Affiliation:
Department of Chemistry, North Dakota State University, Fargo, North Dakota 58105
J.E. Knell
Affiliation:
Department of Chemistry, North Dakota State University, Fargo, North Dakota 58105
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Abstract

Reference intensity ratios (RIRs) with zincite (ZnO) as the internal standard have been measured and calculated for key phases in coal combustion solid residuals. Detailed comparisons of measured and calculated corundum RIRs (converted from zincite RIRs), and literature I/Ic values led to the conclusion that for best results, laboratory measured values must be used. Using measured zincite RIRs and standard mixtures of important crystalline phases, a protocol for routine semi-quantitative analysis has been developed. The need to grind under ethanol to minimize decomposition of hydrated phases was demonstrated. An unusual procedure employing mixed peak and integrated intensities in the RIR of one key phase, ettringite (Ca6Al2(SO4)3(OH)12-26H2O), has been adopted for this protocol.

Type
VI. Whole Pattern Fitting, Phase Analysis by Diffraction Methods
Information
Advances in X-Ray Analysis , Volume 36: Forty-First Annual Conference on Applications of X-ray Analysis, August 3-7, 1992 , 1992 , pp. 343 - 353
Copyright
Copyright © International Centre for Diffraction Data 1992

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