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Statements

Subject Item
n2:RIV%2F61989592%3A15310%2F14%3A33152231%21RIV15-MSM-15310___
rdf:type
n7:Vysledek skos:Concept
rdfs:seeAlso
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
dcterms:description
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 decomposition temperature, 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 have common decomposition products such as metallic iron (in general, rounded particles below 4 mým) and Fe-spinel; the other identified decomposition products depend on starting chemical composition of the garnet: Fe-cordierite, olivine (fayalite or tephroite), cristobalite, pyroxene (enstatite or pigeonite), and anorthite. Anorthite and pigeonite were only present in garnets with Ca in the dodecahedral site. All the identified phases were usually well crystallized. 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 decomposition temperature, 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 have common decomposition products such as metallic iron (in general, rounded particles below 4 mým) and Fe-spinel; the other identified decomposition products depend on starting chemical composition of the garnet: Fe-cordierite, olivine (fayalite or tephroite), cristobalite, pyroxene (enstatite or pigeonite), and anorthite. Anorthite and pigeonite were only present in garnets with Ca in the dodecahedral site. All the identified phases were usually well crystallized.
dcterms:title
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) 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)
skos:prefLabel
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) 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)
skos:notation
RIV/61989592:15310/14:33152231!RIV15-MSM-15310___
n3:aktivita
n16:P
n3:aktivity
P(ED2.1.00/03.0058), P(EE2.3.20.0017), P(EE2.3.20.0056), P(EE2.3.20.0155), P(LH12079)
n3:dodaniDat
n13:2015
n3:domaciTvurceVysledku
n4:9251189 n4:5207193 n4:8570647 Aparicio Ordonez, Claudia Jeannette Sarita
n3:druhVysledku
n22:D
n3:duvernostUdaju
n8:S
n3:entitaPredkladatele
n20:predkladatel
n3:idSjednocenehoVysledku
21671
n3:idVysledku
RIV/61989592:15310/14:33152231
n3:jazykVysledku
n18:eng
n3:klicovaSlova
Fe-bearing garnets, thermal behavior, reducing atmosphere, iron particles, Mössbauer spectroscopy.
n3:klicoveSlovo
n10:Fe-bearing%20garnets n10:reducing%20atmosphere n10:thermal%20behavior n10:M%C3%B6ssbauer%20spectroscopy. n10:iron%20particles
n3:kontrolniKodProRIV
[FA8B3E88471D]
n3:mistoKonaniAkce
Hlohovec u Břeclavi
n3:mistoVydani
New York
n3:nazevZdroje
AIP Conference Proceedings
n3:obor
n5:BM
n3:pocetDomacichTvurcuVysledku
4
n3:pocetTvurcuVysledku
4
n3:projekt
n17:EE2.3.20.0155 n17:EE2.3.20.0056 n17:ED2.1.00%2F03.0058 n17:LH12079 n17:EE2.3.20.0017
n3:rokUplatneniVysledku
n13:2014
n3:tvurceVysledku
Aparicio Ordonez, Claudia Jeannette Sarita Zbořil, Radek Filip, Jan Mašláň, Miroslav
n3:typAkce
n19:EUR
n3:wos
000345961800003
n3:zahajeniAkce
2014-05-26+02:00
s:issn
0094-243X
s:numberOfPages
13
n11:doi
10.1063/1.4898606
n23:hasPublisher
American Institute of Physics
n12:isbn
978-0-7354-1259-0
n15:organizacniJednotka
15310