HEAT CAPACITY OF TETRAMETHYLAMMONIUM TRICHLOROMANGANATE(II) FROM 1.5 TO 300K
BY ANTHONY G DUNN, MICHAEL JEWESS, LIONEL A K STAVELEY, AND RICHARD D WORSWICK
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This work was performed in the Inorganic Chemistry Laboratory, University of Oxford, UK, and was published in J. Chem. Thermodynamics.
The heat capacity of tetramethylammonium trichloromanganate(II), N(CH3)4MnCl3, from 1.5 to 300 K is reported. The principal novelty of the results is in the region above 52 K, for which only a very small-scale plot has previously been published. From our results we estimate the anomalous molar entropy gain associated with the monoclinic-to-hexagonal transition (Tλ = 126 K) as R ln 2.8.
Keywords: thermodynamics, crystallography, disorder, orientational disorder, specific heat, heat capacity, anomaly, TMMC, tetramethylammonium, trichloromanganate(II).
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