A Raman spectroscopic study of the arsenate mineral chenevixite Cu2Fe23+(AsO4)2(OH)4⋅H2O


Autoria(s): Frost, Ray L.; López, Andrés; Scholz, Ricardo; Lana, Cristiano; Xi, Yunfei
Data(s)

25/01/2015

Resumo

We have studied the mineral chenevixite from Manto Cuba Mine, San Pedro de Cachiyuyo District, Inca de Oro, Chañaral Province, Atacama Region, Chile, using a combination of scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDX) and vibrational spectroscopy. Qualitative chemical analysis shows a homogeneous composition, with predominance of As, Fe, Al, Cu, Fe and Cu. Minor amounts of Si were also observed. Raman spectroscopy complimented with infrared spectroscopy has been used to assess the molecular structure of the arsenate minerals chenevixite. Characteristic Raman and infrared bands of the (AsO4)3− stretching and bending vibrations are identified and described. The observation of multiple bands in the (AsO4)3− bending region offers support for the loss of symmetry of the arsenate anion in the structure of chenevixite. Raman bands attributable to the OH stretching vibrations of water and hydroxyl units were analysed. Estimates of the hydrogen bond distances were made based upon the OH stretching wavenumbers.

Formato

application/pdf

Identificador

http://eprints.qut.edu.au/74510/

Publicador

Elsevier BV

Relação

http://eprints.qut.edu.au/74510/5/__qut.edu.au_Documents_StaffHome_StaffGroupR%24_rogersjm_Desktop_VS-chenevixite-3-nfc-revised2.pdf

DOI:10.1016/j.saa.2014.06.091

Frost, Ray L., López, Andrés, Scholz, Ricardo, Lana, Cristiano, & Xi, Yunfei (2015) A Raman spectroscopic study of the arsenate mineral chenevixite Cu2Fe23+(AsO4)2(OH)4⋅H2O. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 135, pp. 192-197.

Direitos

Copyright 2014 Elsevier B.V.

This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/

Fonte

School of Chemistry, Physics & Mechanical Engineering; Science & Engineering Faculty

Palavras-Chave #030606 Structural Chemistry and Spectroscopy #Chenevixite #Luetheite #Arsenate #Raman spectroscopy #Infrared spectroscopy
Tipo

Journal Article