About: Thermal behavior of almandine at temperatures up to 1,200A degrees C in hydrogen

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	The thermally induced reductive decomposition of a natural near end-member almandine [VIII(Fe2.85Mg0.11Ca0.05Mn0.02)VI(Al1.99)IV(Si2.99)O12] and possible hydrogen diffusion into its structure have been carried out at temperatures up to 1,200°C, monitored by simultaneous thermogravimetric analysis and differential scanning calorimetry (DSC), infrared and 57Fe Mössbauer spectroscopy and X-ray powder diffraction. Below 1,000°C, evidence for hydrogen diffusion into almandine structure was not observed. At temperatures above 1,000°C, reductive decomposition sets in, as displayed by a sharp endothermic peak at 1,055°C on the DSC curve accompanied by a total mass loss of 3.51%. We observe the following decomposition mechanism: almandine + hydrogen ? alfa-Fe + cristobalite + hercynite + water. At higher temperatures, fayalite and sekaninaite are formed by consecutive reaction of alfa-Fe with cristobalite and water, and cristobalite with hercynite, respectively. The metallic alfa-Fe phase forms spherical and isolated particles (~1 mým). The thermally induced reductive decomposition of a natural near end-member almandine [VIII(Fe2.85Mg0.11Ca0.05Mn0.02)VI(Al1.99)IV(Si2.99)O12] and possible hydrogen diffusion into its structure have been carried out at temperatures up to 1,200°C, monitored by simultaneous thermogravimetric analysis and differential scanning calorimetry (DSC), infrared and 57Fe Mössbauer spectroscopy and X-ray powder diffraction. Below 1,000°C, evidence for hydrogen diffusion into almandine structure was not observed. At temperatures above 1,000°C, reductive decomposition sets in, as displayed by a sharp endothermic peak at 1,055°C on the DSC curve accompanied by a total mass loss of 3.51%. We observe the following decomposition mechanism: almandine + hydrogen ? alfa-Fe + cristobalite + hercynite + water. At higher temperatures, fayalite and sekaninaite are formed by consecutive reaction of alfa-Fe with cristobalite and water, and cristobalite with hercynite, respectively. The metallic alfa-Fe phase forms spherical and isolated particles (~1 mým). (en)
Title	Thermal behavior of almandine at temperatures up to 1,200A degrees C in hydrogen Thermal behavior of almandine at temperatures up to 1,200A degrees C in hydrogen (en)
skos:prefLabel	Thermal behavior of almandine at temperatures up to 1,200A degrees C in hydrogen Thermal behavior of almandine at temperatures up to 1,200A degrees C in hydrogen (en)
skos:notation	RIV/61989592:15310/12:33138930!RIV13-MSM-15310___
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(ED2.1.00/03.0058), P(KAN115600801), Z(MSM6198959218)
http://linked.open...iv/cisloPeriodika	4
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Zbořil, Radek Filip, Jan Mašláň, Miroslav Marušák, Zdeněk Aparicio Ordonez, Claudia J.S.
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Univerzita Palackého v Olomouci / Přírodovědecká fakulta
http://linked.open...dnocenehoVysledku	174245
http://linked.open...ai/riv/idVysledku	RIV/61989592:15310/12:33138930
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Fe-bearing garnet - Almandine - Thermal treatment - Hydrogen diffusion - Reductive decomposition - Iron particles (en)
http://linked.open.../riv/klicoveSlovo	Fe-bearing garnet
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[140BB87CE065]
http://linked.open...i/riv/nazevZdroje	PHYSICS AND CHEMISTRY OF MINERALS
http://linked.open...in/vavai/riv/obor	DB
http://linked.open...ichTvurcuVysledku	5 (xsd:int)
http://linked.open...cetTvurcuVysledku	6 (xsd:int)
http://linked.open...vavai/riv/projekt	Regional Centre of Advanced Technologies and Materials New technologies of preparation and exploitation of iron oxide-based nanoparticles for environmental, industrial and medical applications
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	39
http://linked.open...iv/tvurceVysledku	Filip, Jan Zbořil, Radek Mašláň, Miroslav Marušák, Zdeněk Skogby, Henrik Aparicio Ordonez, Claudia J.S.
http://linked.open...ain/vavai/riv/wos	000302248500005
http://linked.open...n/vavai/riv/zamer	Komplexní sloučeniny a oxidy přechodných kovů s využitím v bioaplikacích a nanotechnologiích
issn	0342-1791
number of pages	8 (xsd:int)
http://bibframe.org/vocab/doi	10.1007/s00269-012-0488-x
http://localhost/t...ganizacniJednotka	15310

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