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Phase relations and activities of (Mn,Ni)-olivine solid solution in the ternary system MnO-NiO-SiO2
1996 (English)In: Acta Chemica Scandinavica, ISSN 0904-213X, E-ISSN 1902-3103, Vol. 50, no 12, p. 1102-1107Article in journal (Refereed) Published
Abstract [en]

Phase relations involving tie-lines between (Mn, Ni)O and (Mn, Ni)(2)SiO4 solid solutions in the ternary system MnO-NiO-SiO2 have been studied experimentally at 1310 K. A great number of mixtures, with various constitutions, were equilibrated and the compositions of coexisting solid-solution phases were determined by inductively coupled plasma (ICP) analysis as well as X-ray d-spacing measurements. The olivine phase (Mn-1-y,Ni-y)(2)SiO4 and SiO2 occur together at compositions 0.27 less than or equal to y less than or equal to 1, and the pyroxene phase (Mn-1-z, Ni-z)SiO3 exists only in the composition range 0 less than or equal to z less than or equal to 0.08. The activities in the (Mn, Ni)-olivine solid solution were derived from the tie-line data obtained at 1310 K. By using the solid-state EMF method, the activities of Ni-olivine solid solution were also determined at several compositions, 0.27 less than or equal to y less than or equal to 1, in the temperature range 1140-1395 K. The activities obtained from both methods show significant positive deviations from ideality.

Place, publisher, year, edition, pages
1996. Vol. 50, no 12, p. 1102-1107
Identifiers
URN: urn:nbn:se:umu:diva-38637ISI: A1996VY70900006OAI: oai:DiVA.org:umu-38637DiVA, id: diva2:379648
Available from: 2010-12-19 Created: 2010-12-19 Last updated: 2017-12-11

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