The influence of the iron content on the reductive decomposition of A 3?x Fe x Al 2 Si 3 O 12 garnets (A = Mg, Mn; 0.47 ? x ? 2.85)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F14%3A33152231" target="_blank" >RIV/61989592:15310/14:33152231 - isvavai.cz</a>

Výsledek na webu

<a href="http://scitation.aip.org/docserver/fulltext/aip/proceeding/aipcp/1622/10.1063/1.4898606/1.4898606.pdf?expires=1424094662&id=id&accname=guest&checksum=DE6DA0BDAD68D5EA13B3ACBFD7528F7A" target="_blank" >http://scitation.aip.org/docserver/fulltext/aip/proceeding/aipcp/1622/10.1063/1.4898606/1.4898606.pdf?expires=1424094662&id=id&accname=guest&checksum=DE6DA0BDAD68D5EA13B3ACBFD7528F7A</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/1.4898606" target="_blank" >10.1063/1.4898606</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The influence of the iron content on the reductive decomposition of A 3?x Fe x Al 2 Si 3 O 12 garnets (A = Mg, Mn; 0.47 ? x ? 2.85)

Popis výsledku v původním jazyce

Thermally-induced reductive decomposition of natural iron-bearing garnets of the almandine-pyrope and almandine-spessartine series were studied at temperatures up to 1200 °C (heating rate of 10 °C/min) under atmosphere of forming gas (10% of H2 in N2). Crystallochemical formula of the studied garnet was calculated as VIII(A3-xFe2+ x)VI(Al, Fe3+)2Si3O12, where the amount of Fe3+ in the octahedral sites is negligible with the exception of pyrope, A = Mg, Mn, and 0.47 ? x ? 2.85. The observed decompositiontemperature, determined from differential scanning calorimetry and thermogravimetry, is greater than 1000 °C in all cases and showed almost linear dependence on the iron content in the dodecahedral sites of the studied garnets, with the exception of garnet with a near-pyrope composition (Prp80Alm20). The initial garnet samples and decomposition products were characterized in details by means of X-ray powder diffraction and 57Fe Mössbauer spectroscopy. We found that all studied garnets h

Název v anglickém jazyce

The influence of the iron content on the reductive decomposition of A 3?x Fe x Al 2 Si 3 O 12 garnets (A = Mg, Mn; 0.47 ? x ? 2.85)

Popis výsledku anglicky

Thermally-induced reductive decomposition of natural iron-bearing garnets of the almandine-pyrope and almandine-spessartine series were studied at temperatures up to 1200 °C (heating rate of 10 °C/min) under atmosphere of forming gas (10% of H2 in N2). Crystallochemical formula of the studied garnet was calculated as VIII(A3-xFe2+ x)VI(Al, Fe3+)2Si3O12, where the amount of Fe3+ in the octahedral sites is negligible with the exception of pyrope, A = Mg, Mn, and 0.47 ? x ? 2.85. The observed decompositiontemperature, determined from differential scanning calorimetry and thermogravimetry, is greater than 1000 °C in all cases and showed almost linear dependence on the iron content in the dodecahedral sites of the studied garnets, with the exception of garnet with a near-pyrope composition (Prp80Alm20). The initial garnet samples and decomposition products were characterized in details by means of X-ray powder diffraction and 57Fe Mössbauer spectroscopy. We found that all studied garnets h

Druh

D - Stať ve sborníku

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název statě ve sborníku

AIP Conference Proceedings

ISBN

978-0-7354-1259-0

ISSN

0094-243X

e-ISSN

—

Počet stran výsledku

13

Strana od-do

12-23

Název nakladatele

American Institute of Physics

Místo vydání

New York

Místo konání akce

Hlohovec u Břeclavi

Datum konání akce

26. 5. 2014

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

000345961800003