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

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About: Iron redox reactions in the tourmaline structure: High-temperature treatment of Fe3+-rich schorl Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
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. 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. (en)
Title	Iron redox reactions in the tourmaline structure: High-temperature treatment of Fe3+-rich schorl Iron redox reactions in the tourmaline structure: High-temperature treatment of Fe3+-rich schorl (en)
skos:prefLabel	Iron redox reactions in the tourmaline structure: High-temperature treatment of Fe3+-rich schorl Iron redox reactions in the tourmaline structure: High-temperature treatment of Fe3+-rich schorl (en)
skos:notation	RIV/61989592:15310/12:33141000!RIV13-MSM-15310___
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(ED2.1.00/03.0058), P(GAP210/10/0743), Z(MSM6198959218)
http://linked.open...iv/cisloPeriodika	JUN
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Čuda, Jan Tuček, Jiří Filip, Jan
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	143041
http://linked.open...ai/riv/idVysledku	RIV/61989592:15310/12:33141000
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Fe; Mössbauer; chemistry; Mn-tourmaline; dravite series; site occupancies; chemical-composition; ferric-iron; heat-treatment; crystal-structure (en)
http://linked.open.../riv/klicoveSlovo	heat-treatment Mössbauer Mn-tourmaline chemical-composition dravite series ferric-iron site occupancies Fe chemistry crystal-structure
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[A8C03B0FDFB8]
http://linked.open...i/riv/nazevZdroje	Geochimica et Cosmochimica Acta
http://linked.open...in/vavai/riv/obor	DD
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	7 (xsd:int)
http://linked.open...vavai/riv/projekt	Regional Centre of Advanced Technologies and Materials Chemical composition and structural order of natural tourmalines - geochemical versus crystal-structural constrains
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	86
http://linked.open...iv/tvurceVysledku	Filip, Jan Novák, Milan Tuček, Jiří Čuda, Jan Bosi, Ferdinando Skogby, Henrik Wildner, Manfred
http://linked.open...ain/vavai/riv/wos	000303677400016
http://linked.open...n/vavai/riv/zamer	Komplexní sloučeniny a oxidy přechodných kovů s využitím v bioaplikacích a nanotechnologiích
issn	0016-7037
number of pages	18 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.gca.2012.02.031
http://localhost/t...ganizacniJednotka	15310

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