About: Fe2O3-Cr2O3 system revised.

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Hematite (a-Fe2O4) and eskolaite (Cr2O3) are typical examples of isostructural oxides with non-linear change of the lattice parameters in their solid solutions. This series was synthesized and characterized by X-ray and neutron powder diffraction, and Mossbauer and electronic spectroscopies. A region of the d-d electron transition of Fe(III) ions in near IR region (about 1000 nm) were found to be suitable for the solid solution characterization, because the transition does not suffer from strong overlaps of Fe(III) and Cr(III) transitions in electronic spectra in the Vs spectral range. Lattice parameters, verified by the comparison to data available in literature, showed that in several cases in the last decade solids of questionable quality were obtained and discussed in the hematite-eskolaite system. Neither X-ray nor neutron diffraction indicated cation ordering, hypothesized in two reports in 1990's. Magnetic structure of the solid solution at 0 < x < 0.6, where x = Cr/(Cr + Fe), is similar to tha Hematite (a-Fe2O4) and eskolaite (Cr2O3) are typical examples of isostructural oxides with non-linear change of the lattice parameters in their solid solutions. This series was synthesized and characterized by X-ray and neutron powder diffraction, and Mossbauer and electronic spectroscopies. A region of the d-d electron transition of Fe(III) ions in near IR region (about 1000 nm) were found to be suitable for the solid solution characterization, because the transition does not suffer from strong overlaps of Fe(III) and Cr(III) transitions in electronic spectra in the Vs spectral range. Lattice parameters, verified by the comparison to data available in literature, showed that in several cases in the last decade solids of questionable quality were obtained and discussed in the hematite-eskolaite system. Neither X-ray nor neutron diffraction indicated cation ordering, hypothesized in two reports in 1990's. Magnetic structure of the solid solution at 0 < x < 0.6, where x = Cr/(Cr + Fe), is similar to tha (en)
Title	Fe2O3-Cr2O3 system revised. Fe2O3-Cr2O3 system revised. (en)
skos:prefLabel	Fe2O3-Cr2O3 system revised. Fe2O3-Cr2O3 system revised. (en)
skos:notation	RIV/61388955:_____/03:50033029!RIV/2004/GA0/A54004/N
http://linked.open.../vavai/riv/strany	32;39
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA205/00/1349), P(GV202/98/K002), P(LN00A028), P(ME 209), Z(AV0Z2041904), Z(AV0Z3012916), Z(AV0Z4032918), Z(AV0Z4040901)
http://linked.open...iv/cisloPeriodika	1
http://linked.open...vai/riv/dodaniDat	2004
http://linked.open...aciTvurceVysledku	Dědeček, Jiří
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	Ústav fyzikální chemie J. Heyrovského AV ČR, v.v.i.
http://linked.open...dnocenehoVysledku	607210
http://linked.open...ai/riv/idVysledku	RIV/61388955:_____/03:50033029
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	solid solutions; Vegard law; iron oxide (en)
http://linked.open.../riv/klicoveSlovo	solid solutions iron oxide Vegard law
http://linked.open...odStatuVydavatele	CZ - Česká republika
http://linked.open...ontrolniKodProRIV	[3750A6DDB80D]
http://linked.open...i/riv/nazevZdroje	Ceramics-Silikaty
http://linked.open...in/vavai/riv/obor	CA
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...ocetUcastnikuAkce	0 (xsd:int)
http://linked.open...nichUcastnikuAkce	0 (xsd:int)
http://linked.open...vavai/riv/projekt	New inorganic compounds and advanced materials Detailed magnetic characteristics of power-plant fly ashes http://linked.opendata.cz/resource/domain/vavai/projekt/ME%20209 Measuring station for materials research with application of synchrotron radiation
http://linked.open...UplatneniVysledku	2003
http://linked.open...v/svazekPeriodika	47
http://linked.open...iv/tvurceVysledku	Bezdička, Petr Dědeček, Jiří Grygar, Tomáš Schneeweiss, Oldřich Petrovský, Eduard
http://linked.open...n/vavai/riv/zamer	Synthesis and structure of novel (inorganic) compounds, clusters and composites; mechanisms of conversion and transfer in systems involving inorganic substance Study of the internal structure and physical properties of the Earth and its environs by geophysical methods Objasňování zákonitostí vztahů struktury a vlastností - zejména dynamiky a chemické reaktivity - látek a molekulárních systémů Behavior and properties of metallic and non-metallic materials in relation to their structure, research on processes leading to degradation of material quality
issn	0862-5468
number of pages	8 (xsd:int)

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