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High Temperature Sulfate Minerals Forming on the Burning Coal Dumps from Upper Silesia, Poland

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dc.abstract.enThe subject of this work is the assemblage of anhydrous sulfate minerals formed on burning coal-heaps. Three burning heaps located in the Upper Silesian coal basin in Czerwionka-Leszczyny, Radlin and Rydułtowy near Rybnik were selected for the research. The occurrence of godovikovite, millosevichite, steklite and an unnamed MgSO4 , sometimes accompanied by subordinate admixtures of mikasaite, sabieite, efremovite, langbeinite and aphthitalite has been recorded from these locations. Occasionally they form monomineral aggregates, but usually occur as mixtures practically impossible to separate. The minerals form microcrystalline masses with a characteristic vesicular structure resembling a solidified foam or pumice. The sulfates crystallize from hot fire gases, similar to high temperature volcanic exhalations. The gases transport volatile components from the center of the fire but their chemical compositions are not yet known. Their cooling in the near-surface part of the heap results in condensation from the vapors as viscous liquid mass, from which the investigated minerals then crystallize. Their crystallization temperatures can be estimated from direct measurements of the temperatures of sulfate accumulation in the burning dumps and studies of their thermal decomposition. Millosevichite and steklite crystallize in the temperature range of 510–650 ◦C, MgSO4 forms at 510–600 ◦C and godovikovite in the slightly lower range of 280–450 (546) ◦C. These values are higher than those previously reported.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorSiuda, Rafał
dc.contributor.authorParafiniuk, Jan
dc.date.accessioned2024-01-25T03:28:20Z
dc.date.available2024-01-25T03:28:20Z
dc.date.issued2021
dc.description.financePublikacja bezkosztowa
dc.description.number2
dc.description.volume11
dc.identifier.doi10.3390/MIN11020228
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/108513
dc.identifier.weblinkhttps://www.mdpi.com/2075-163X/11/2/228/pdf
dc.languageeng
dc.pbn.affiliationearth and related environmental sciences
dc.relation.ispartofMinerals
dc.relation.pages228
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.subject.enburning coal-dumps
dc.subject.ensulfate minerals
dc.subject.enexhalations
dc.subject.engodovikovite
dc.subject.ensteklite
dc.subject.enmillosevichite
dc.titleHigh Temperature Sulfate Minerals Forming on the Burning Coal Dumps from Upper Silesia, Poland
dc.typeJournalArticle
dspace.entity.typePublication