The Cr X-ray absorption K-edge structure of poorly crystalline Fe(III)-Cr(III)-oxyhydroxides

• Published in: The American mineralogist Vol. 95; no. 8-9; pp. 1202 - 1213
• Main Authors: Frommer, Jakob, Nachtegaal, Maarten, Czekaj, Izabela, Kretzschmar, Ruben
• Format: Journal Article
• Language: English
• Published: Washington Mineralogical Society of America 01.08.2010; De Gruyter; Walter de Gruyter GmbH
• Subjects: Absorption spectroscopy; Chromium; Crystal structure; crystallinity; Crystals; EXAFS; EXAFS data; experimental studies; ferric iron; Geochemistry; hydroxides; Iron; iron hydroxides; laboratory studies; Low temperature; Low temperature physics; metals; Mineralization; Mineralogy; nonsilicates; oxides; oxyhydroxides; poorly crystalline; pre-edge; Speciation; spectra; Spectrum analysis; Studies; synthetic materials; Trace elements; valency; X-ray diffraction data; X-ray spectra; XANES; XANES spectra

Poorly crystalline solids play an important role in many low-temperature geochemical processes, such as trace element speciation and biomineralization. Yet, the structures of many such naturally occurring phases are poorly understood. X-ray absorption spectroscopy is a powerful tool that permits che...