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Type: Artigo de periódico
Title: Multiple-step preparation and physicochemical characterization of crystalline alpha-germanium hydrogenphosphate
Author: Romano, R
Ruiz, AI
Alves, OL
Abstract: The reaction between germanium oxide and phosphoric acid has previously been described and led to impure germanium hydrogenphosphate samples with low crystallinity. A new multiple-step route involving the same reaction under refluxing and soft hydrothermal conditions is described for the preparation of pure and crystalline alpha-GeP. The physicochemical characterization of the samples allows accompaniment of the reaction evolution as well as determining short- and long-range structural organization. The phase purity of the alpha-GeP sample was confirmed by applying Rietveld's profile analysis, which also determined the cell parameters of its crystals. (C) 2003 Elsevier Inc. All rights reserved.
Subject: layered compounds
chemical synthesis
infrared spectroscopy
nuclear magnetic resonance (NMR)
thermogravimetric analysis (TGA)
X-ray diffraction
Country: EUA
Editor: Academic Press Inc Elsevier Science
Citation: Journal Of Solid State Chemistry. Academic Press Inc Elsevier Science, v. 177, n. 41763, n. 1520, n. 1528, 2004.
Rights: fechado
Identifier DOI: 10.1016/j.jssc.2003.12.002
Date Issue: 2004
Appears in Collections:Unicamp - Artigos e Outros Documentos

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