Iron redox reactions in the tourmaline structure: High-temperature treatment of Fe3+-rich schorl

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F12%3A33141000" target="_blank" >RIV/61989592:15310/12:33141000 - isvavai.cz</a>

Alternative codes found

RIV/00216224:14310/12:00058621

Result on the web

<a href="http://dx.doi.org/10.1016/j.gca.2012.02.031" target="_blank" >http://dx.doi.org/10.1016/j.gca.2012.02.031</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.gca.2012.02.031" target="_blank" >10.1016/j.gca.2012.02.031</a>

Result language

angličtina

Original language name

Iron redox reactions in the tourmaline structure: High-temperature treatment of Fe3+-rich schorl

Original language description

We present a detailed study of thermally-driven oxidation and reduction of Fe in the structure of schorl (as the most widespread tourmaline), Fe2+-bearing olenite and fluor-schorl. The principal Fe3+-rich tourmaline investigated in this study is a natural schorl sample from a unique occurrence in peralkaline rocks near Cancrinite Hill, east of Bancroft, southern Ontario. Tourmaline samples were thermally-treated in air and hydrogen at temperatures of 700, 800 and 900 °C to oxidize or reduce the structural Fe. High-temperature changes were continuously monitored using 57Fe Mössbauer and infrared spectroscopy. Proportions of Fe2+ and Fe3+ vary as a function of the heat treatment. An increase in Fe3+ up to 100% after heating in air at 700 °C was observed,whereas only small changes in the Fe3+/Fetot ratio after heating under hydrogen at 700 °C was revealed. Partial deprotonation/protonation represents charge compensation for the oxidation/reduction of Fe at the Y and Z sites.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

DD - Geochemistry

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2012

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Geochimica et Cosmochimica Acta

ISSN

0016-7037

e-ISSN

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Volume of the periodical

86

Issue of the periodical within the volume

JUN

Country of publishing house

GB - UNITED KINGDOM

Number of pages

18

Pages from-to

239-256

UT code for WoS article

000303677400016

EID of the result in the Scopus database

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