About: The hydrothermal recrystallization of metamict allanite-(Ce)

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Description	Samples of metamict allanite-(Ce) originating from granite pegmatites were recrystallized by heating in air and under hydrothermal conditions. Recrystallization in air resulted in partial recovery of the crystal structure at 650oC. Heating at higher temperatures resulted in decomposition of the allanite structure to a multiphase assemblage containing hematite, cerianite, feldspar, britholite and thorianite. To our knowledge, this is the first report of thorianite as a breakdown product of allanite in literature. The collapse of the structure is mainly related to the removal of structural H2O. Recrystallization under hydrothermal conditions yielded a more rapid and complete recovery of the structure at lower temperatures, without the appearance of additional phases. The stability of the allanite structure during hydrothermal recrystallization is related to the retention of OH- groups, available because of the aqueous environment of recrystallization. Samples of metamict allanite-(Ce) originating from granite pegmatites were recrystallized by heating in air and under hydrothermal conditions. Recrystallization in air resulted in partial recovery of the crystal structure at 650oC. Heating at higher temperatures resulted in decomposition of the allanite structure to a multiphase assemblage containing hematite, cerianite, feldspar, britholite and thorianite. To our knowledge, this is the first report of thorianite as a breakdown product of allanite in literature. The collapse of the structure is mainly related to the removal of structural H2O. Recrystallization under hydrothermal conditions yielded a more rapid and complete recovery of the structure at lower temperatures, without the appearance of additional phases. The stability of the allanite structure during hydrothermal recrystallization is related to the retention of OH- groups, available because of the aqueous environment of recrystallization. (en)
Title	The hydrothermal recrystallization of metamict allanite-(Ce) The hydrothermal recrystallization of metamict allanite-(Ce) (en)
skos:prefLabel	The hydrothermal recrystallization of metamict allanite-(Ce) The hydrothermal recrystallization of metamict allanite-(Ce) (en)
skos:notation	RIV/00216224:14310/10:00040621!RIV11-AV0-14310___
http://linked.open...avai/riv/aktivita	P
http://linked.open...avai/riv/aktivity	P(KJB301630801)
http://linked.open...iv/cisloPeriodika	3
http://linked.open...vai/riv/dodaniDat	2011
http://linked.open...aciTvurceVysledku	Škoda, Radek
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	Masarykova univerzita / Přírodovědecká fakulta
http://linked.open...dnocenehoVysledku	262516
http://linked.open...ai/riv/idVysledku	RIV/00216224:14310/10:00040621
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	allanite-(Ce); metamictization; hydrothermal recrystallization; X-ray diffraction; granitic pegmatite (en)
http://linked.open.../riv/klicoveSlovo	allanite-(Ce) X-ray diffraction granitic pegmatite hydrothermal recrystallization metamictization
http://linked.open...odStatuVydavatele	CA - Kanada
http://linked.open...ontrolniKodProRIV	[56A899F4AED7]
http://linked.open...i/riv/nazevZdroje	Canadian Mineralogist
http://linked.open...in/vavai/riv/obor	DB
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	The interaction of metamict minerals and hydrothermal fluids and its significance in the geological environment
http://linked.open...UplatneniVysledku	2010
http://linked.open...v/svazekPeriodika	48
http://linked.open...iv/tvurceVysledku	Škoda, Radek Bermanec, Vladimir Tomašič, Nenad Čobič, Andrea
issn	0008-4476
number of pages	9 (xsd:int)
http://localhost/t...ganizacniJednotka	14310
is http://linked.open...avai/riv/vysledek of	The hydrothermal recrystallization of metamict allanite-(Ce) The hydrothermal recrystallization of metamict allanite-(Ce) The hydrothermal recrystallization of metamict allanite-(Ce)

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