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Characterisation of conichalcite by SEM, FTIR, Raman and electronic reflectance spectroscopy

Reddy, B. Jagannadha, Frost, Ray L., & Martens, Wayde N. (2005) Characterisation of conichalcite by SEM, FTIR, Raman and electronic reflectance spectroscopy. Mineralogical Magazine, 69(2), pp. 155-167.

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Abstract

The mineral conichalcite from Bagdad mine- West of, Bagdad, Eureka District, Yavapai Co., Arizona, USA has been characterised by electronic, Near-IR, Raman and infrared spectroscopy. SEM micrographs show the mineral consists of bundles of fibres. Calculations of the EDX analyses on the stoichiometric basis show the substitution of arsenate by 12 wt % of phosphate in the mineral. Raman and infrared bands are assigned in terms of the fundamental modes of AsO43- and PO43- molecules and are related to the mineral structure. Near-IR reflectance spectroscopy shows the presence of adsorbed water and hydroxyl units in the mineral. The Cu(II) coordination polyhedron in conichalcite can have at best pseudo-tetragonal geometry. The crystal field and tetragonal field parameters of Cu(II) complex were calculated and found to agree well with the values reported for known tetragonal distortion octahedral complexes.

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15 citations in Web of Science®

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ID Code: 1542
Item Type: Journal Article
Keywords: conichalcite, adelite, austenite, duftite, SEM and EDX analyses, FTIR, Raman and electronic spectroscopy
DOI: 10.1180/0026461056920243
ISSN: 0026-461X
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > INORGANIC CHEMISTRY (030200)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2005 Mineralogical Society
Copyright Statement: Reproduced in accordance with the copyright policy of the publisher.
Deposited On: 08 Jun 2005
Last Modified: 29 Feb 2012 23:17

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