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# Gibbs' energy of formation of nickel orthosilicate $(Ni_2SiO_4)$

Jacob, KT and Shukla, AK and Akila, Ramachandran and Kale, GM (1986) Gibbs' energy of formation of nickel orthosilicate $(Ni_2SiO_4)$. In: High Temperature Materials and Processes, 7 (2-3). pp. 141-148.

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## Abstract

A solid-state galvanic cell was used to detect the free energy of formation of $Ni_2SiO_4$ [13775-54-7], from NiO and quartz at 925-1375 K. The value for the olivine form is (-13,050 + 5.67 T) $\pm 100 J/mol$ (T in K). The free energy of formation of the spinel form was obtained from the above value and the high-pressure data for olivine spinel transition reported in the literature: (-6970 + 9.70 T) $\pm 710 J/mol$ at 900-1500 K.

Item Type: Journal Article http://www.freundpublishing.com/High_Tem... Copyright of this article belongs to Freund Publishing House. Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy) 24 Jul 2008 27 Aug 2008 13:29 http://eprints.iisc.ernet.in/id/eprint/14514

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