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American Mineralogist

Journal of Earth and Planetary Materials

Ed. by Baker, Don / Xu, Hongwu / Swainson, Ian


IMPACT FACTOR 2018: 2.631

CiteScore 2018: 2.55

SCImago Journal Rank (SJR) 2018: 1.355
Source Normalized Impact per Paper (SNIP) 2018: 1.103

Online
ISSN
1945-3027
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Volume 86, Issue 10

Issues

Low-temperature heat capacity of pentlandite

Gleb A. Berezovskii / Valeri A. Drebushcha / Tatyana A. Kravchenko
Published Online: 2015-03-26 | DOI: https://doi.org/10.2138/am-2001-1020

Abstract

The heat capacity of synthetic pentlandite Fe4.60Ni4.54S8 was measured over the temperature range 6-306 K. Experimental values of CP (T) indicate that there are no phase transitions. The thermodynamic functions CP (T), H(T) - H(0), and S(T) - S(0) were evaluated: CP (298.15) = 442.7 J/mol·K, S(298.15) - S(0) = 474.9 J/mol·K, and H(298.15) - H(0) = 76280 J/mol (molar mass: 779.877 g). Below 10 K, the heat capacity of pentlandite fits the regression CP(T) = a T + b T3. The linear term is typical of metals and known as an electronic contribution to the heat capacity. This agrees with the hypothesis that there is metal bonding among cations in tetrahedral sites.

About the article

Received: 2001-01-29

Accepted: 2001-06-12

Published Online: 2015-03-26

Published in Print: 2001-10-01


Citation Information: American Mineralogist, Volume 86, Issue 10, Pages 1312–1313, ISSN (Online) 1945-3027, ISSN (Print) 0003-004X, DOI: https://doi.org/10.2138/am-2001-1020.

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© 2015 by Walter de Gruyter Berlin/Boston.

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