Thernmodynamics and Phase Equilibria in the (Ni, Cu, Zn)-(As, Sb, Bi)-S Systems at Elevated Temperature (300-900 C)

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dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorTesfaye, Fiseha
dc.contributor.authorTaskinen, Pekka
dc.contributor.departmentMateriaalitekniikan laitosfi
dc.contributor.departmentDepartment of Materials Science and Engineeringen
dc.contributor.labMetallurgical Thermodynamics and Modeling Research Groupen
dc.contributor.labMetallurgisten prosessien termodynamiikka ja mallinnusfi
dc.contributor.schoolKemian tekniikan korkeakoulufi
dc.contributor.schoolSchool of Chemical Technologyen
dc.date.accessioned2014-10-13T05:54:22Z
dc.date.available2014-10-13T05:54:22Z
dc.date.issued2010
dc.descriptionOpenen
dc.description.abstractStable phase relations in the (Ni, Cu)-(As, Sb)-S, Cu-Bi-S and Zn-As-S systems and their thermodynamic properties, at the presence of the impurities, are reviewed. The Cu-based systems are relatively intensively studied. Among the sulfosalts of these systems tetrahedrite (Cu12+xSb4+yS13, where 0 < x < 1.92 and -0.02 < y < 0.27) and tennantite (Cu12+xAs4+yS13, where 0 < x < 1.72 and 0 < y < 0.08) are reported to be the most stable relative to other sulfosalts and certain other sulfide phases, which accounts for their common occurrence in a variety of mineral ore deposits. Natural tetrahedrite and tennantite in equilibrium with other minerals commonly constitute other chemical elements as a substitution for Cu, As and Sb and both are described by the general formula:(Cu, Ag)10(Fe, Zn, Cu, Hg, Cd, Co, Au)2(Sb, As)4S13. According to the literature data the Ni-based systems comprise a single stoichiometric ternary stable phase for their respective impurities (gersdorffite, NiAsS, and ullmannite, NiSbS), and both experience a wide solid solubility range. At favorable conditions substitution of As for S in the gersdorffite and Co for Ni and Sb for As in the ullmennite are the main mechanisms of solid solution formations. Thermodynamic properties and phase equilibria studies in the Zn-As-S system are rare among published litrature. A study about this system, below 760 oC, has shown that there is no ternary phase stable. In general, the ternary systems have complex phase relations, which may be as a result of the very low differences in their Gibbs energies of formation.en
dc.description.versionPeer revieweden
dc.format.extent51 p.
dc.format.mimetypeapplication/pdfen
dc.identifier.citationTesfaye, Fiseha & Taskinen, Pekka. 2010. Thernmodynamics and Phase Equilibria in the (Ni, Cu, Zn)-(As, Sb, Bi)-S Systems at Elevated Temperature (300-900 C). Teknillisen korkeakoulun materiaalitekniikan julkaisuja. TKK-MT-216. ISSN 1455-2329 (printed). ISBN 978-952-3273-3 (printed).en
dc.identifier.isbn978-952-3273-3 (printed)
dc.identifier.issn1455-2329 (printed)
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/14192
dc.identifier.urnURN:NBN:fi:aalto-201410132803
dc.language.isoenen
dc.publisherAalto Universityen
dc.publisherAalto-yliopistofi
dc.relation.ispartofseriesTeknillisen korkeakoulun materiaalitekniikan julkaisujaen
dc.relation.ispartofseriesTKK-MT-216
dc.rights.holderFiseha Tesfaye
dc.subject.keywordSulfidesen
dc.subject.keywordSulfosalten
dc.subject.keywordPhase equilibriumen
dc.subject.keywordThermodynamic propertyen
dc.subject.otherChemistryen
dc.subject.otherEnergyen
dc.subject.otherIndustrial engineeringen
dc.subject.otherMaterials scienceen
dc.subject.otherMetallurgyen
dc.titleThernmodynamics and Phase Equilibria in the (Ni, Cu, Zn)-(As, Sb, Bi)-S Systems at Elevated Temperature (300-900 C)en
dc.typeD4 Julkaistu kehittämis- tai tutkimusraportti tai -selvitysfi
dc.type.dcmitypetexten
dc.type.versionFinal published versionen
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