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Water-related IR characteristics in natural fibrous diamonds

Published online by Cambridge University Press:  05 July 2018

D. A. Zedgenizov ,
A. A. Shiryaev ,
V. S. Shatsky  and
H. Kagi
D. A. Zedgenizov
Affiliation:
Institute of Mineralogy and Petrography of SB RAS, pr. Koptyuga 3, 630090, Novosibirsk, Russia
A. A. Shiryaev*
Affiliation:
Institute of Crystallography of RAS, Leninsky pr. 59, 119333, Moscow, Russia
V. S. Shatsky
Affiliation:
Institute of Mineralogy and Petrography of SB RAS, pr. Koptyuga 3, 630090, Novosibirsk, Russia
H. Kagi
Affiliation:
Laboratory for Earthquake Chemistry, Graduate School of Science, University of Tokyo, Tokyo 113-0033, Japan
*
*E-mail: [email protected]
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Abstract

Water-related features were studied using infrared absorption spectroscopy in fibrous diamonds with micro-inclusions. Both OH-stretching and HOH-bending vibrations were observed. The lack of correlation between the intensities of HOH and OH bands in different samples and the complexity of the OH-stretching band indicate that a large fraction of water is present as hydroxyl groups in minerals.

Heating and cooling experiments were performed to elucidate the properties of fluids in micro-inclusions in diamonds. The results of experiments at various temperatures support the presence of several water-related components in individual diamonds. These spectroscopic investigations of fibrous diamonds revealed two or more interrelated water-related components preserved in micro-inclusions. The existence of several water phases or water solutions with different salinity and solutes within one diamond crystal is possible.

Keywords

diamondfluid inclusionssupercritical watervibrational spectroscopy
Type
Research Article
Information
Mineralogical Magazine , Volume 70 , Issue 2 , April 2006 , pp. 219 - 229
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2006

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