REAL

Identification of hydrogen defects linked to boron substitution in synthetic forsterite and natural olivine

Ingrin, Jannick and Kovács, István János and Deloule, Etienne and Balan, Etienne and Blanchard, Marc and Kohn, Simon C. and Hermann, Joerg (2014) Identification of hydrogen defects linked to boron substitution in synthetic forsterite and natural olivine. American Mineralogist, 99 (10). pp. 2138-2144. ISSN 0003-004X

This is the latest version of this item.

[img]
Preview
Text
Ingrinetal2014AmMinBinol.pdf - Published Version

Download (917kB) | Preview

Abstract

Experimental and theoretical evidence for the coupled substitution of B and H in synthetic forsterite and a natural olivine is presented. The intensities of OH bands at 3704 (//z), 3598 (//x,y), {{AU:OK?}} and 3525 cm–1 (//x) in a heterogeneous B-doped synthetic forsterite crystal matches the zoning of B concentration measured by ion probe. The two anti-symmetric stretching vibrations of BO3 groups occur at 1301 cm–1 (//x) and 1207 cm–1 (//z) for the 10B and at 1256 and 1168 cm–1 for the 11B isotope. A microscopic model of the mixed (B,H) defect that accounts for experimental observations is obtained from quantum mechanical calculations. The BO3 group lies on the (O3-O1-O3) face of the vacant Si site and the H atom is bonded to the O2 atom at the remaining apex. The occurrence of the same OH bands associated with n3 BO3 vibrations in a natural olivine sample from Pakistan confirms the occurrence of this defect in nature. The three diagnostic OH bands can be used as a signature of H associated with boron substitution in olivine and forsterite, leading to a quantitative analysis of their contribution to H-defects.

Item Type: Article
Subjects: Q Science / természettudomány > QD Chemistry / kémia > QD05 Crystallography / kristálytan
Q Science / természettudomány > QD Chemistry / kémia > QD06 Mineralogy / ásványtan
Q Science / természettudomány > QE Geology / földtudományok > QE02 Geochemistry / geokémia
Depositing User: Dr. István János Kovács
Date Deposited: 03 Oct 2016 18:38
Last Modified: 03 Oct 2016 18:38
URI: http://real.mtak.hu/id/eprint/41014

Available Versions of this Item

Actions (login required)

Edit Item Edit Item