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Type: Artigo de periódico
Title: Experimental Evidence for the Influence of Mn3+ Concentration on the Impurity Incorporation and Habit Modification Mechanism of Potassium Dihydrogen Phosphate
Author: Remedios, CMR
dos Santos, AO
Lai, X
Roberts, KJ
Moreira, SGC
Miranda, MAR
de Menezes, AS
Rouxinol, FP
Cardoso, LP
Abstract: High resolution X-ray diffraction is applied to study Mn3+ doped potassium dihydrogen phosphate (KDP) single crystals as it function of dopant concentration with quantitative dopant composition within the crystals being assessed using Rutherford backscattering spectroscopy (RBS). Synchrotron radiation high resolution X-ray multiple diffraction Studies using both the Renninger scanning and two-dimensional angular mapping techniques are consistent with the Mn3+ ionic complex entering the crystal lattice via a substitutional incorporation mechanism for Mn3+ at a concentration of 0.1 wt %. For a higher Mn concentration of 0.9 wt %, the data indicate incorporation via an interstitial mechanism associated with a decrease in lattice perfection (an increased mosaic spread). This analysis is supported through X-ray powder diffraction studies which reveal lattice contraction for lower dopant levels with lattice dilation for the higher dopant levels. The potential impact of this observation on the associated crystal growth habit modification process is discussed.
Country: EUA
Editor: Amer Chemical Soc
Citation: Crystal Growth & Design. Amer Chemical Soc, v. 10, n. 3, n. 1053, n. 1058, 2010.
Rights: fechado
Identifier DOI: 10.1021/cg8013255
Date Issue: 2010
Appears in Collections:Unicamp - Artigos e Outros Documentos

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