Raman and infrared spectroscopic characterization of the silicate mineral lamprophyllite
The mineral lamprophyllite is fundamentally a silicate based upon tetrahedral siloxane units with extensive substitution in the formula. Lamprophyllite is a complex group of sorosilicates with general chemical formula given as A2B4C2Si2O7(X)4, where the site A can be occupied by strontium, barium, sodium, and potassium; the B site is occupied by sodium, titanium, iron, manganese, magnesium, and calcium. The site C is mainly occupied by titanium or ferric iron and X includes the anions fluoride, hydroxyl, and oxide. Chemical composition shows a homogeneous phase, composed of Si, Na, Ti, and Fe. This complexity of formula is reflected in the complexity of both the Raman and infrared spectra. The Raman spectrum is characterized by intense bands at 918 and 940 cm−1. Other intense Raman bands are found at 576, 671, and 707 cm−1. These bands are assigned to the stretching and bending modes of the tetrahedral siloxane units.
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|Item Type:||Journal Article|
|Keywords:||infrared spectroscopy, lamprophyllite, Raman spectroscopy, silicate, titanate|
|Divisions:||Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
|Copyright Owner:||Copyright 2015 Taylor & Francis Group, LLC|
|Copyright Statement:||The Version of Record of this manuscript has been published
and is available in Spectroscopy Letters, 17 June 2015,
|Deposited On:||22 Jun 2015 23:00|
|Last Modified:||17 Jun 2016 20:41|
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