Polymorphism in bicyclo[3.3.1]nonan-9-one: A molecular solid that can exist in both its ordered and its disordered phases at room temperature

The heat capacity of Ni2SiOa-olivine has been measured between 5 and 387 K by cryogenic adiabatic-shield calorimetry and between 360 and 1000 K by ditrerential scanning calorimetry. There is a \-type transition in Ni2SiOa-olivine at 29.15+0.05 K. At 298.15 K the molar heat capacity and entropy of Ni2SiOa-olivine are 723.2+0.2 and 128.110.2 J/ (mol ' K), respectively. Between 300 and 1300 K the heat capacity can be represented by the equation C1 : 289.73 - 0.024015T + 73I0451f - 2779.01Tt/2 to within -+0.57o. From our heat capacity measurements, combined with results from molten salt calorimetry, thermal decomposition of Ni2SiOa-olivine into its constituent oxides, and equilibrium studies, both by CO reduction and solid state electrochemical cell measurements for the reaction

Standard molar entropy

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The heat capacity of NdAlO3 from 0 to 900K

Thermochimica Acta (1999)

R.R. van der Laan R.J.M. Konings A.C.G. van Genderen J.C. van Miltenburg

Atmospheric temperature range

10.1016/s0040-6031(99)00006-4

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High temperature enthalpy and heat capacity of GaN

Thermochimica Acta (2003)

Jindřich Leitner A. Strejc David Sedmidubský Květoslav Růžička

Standard molar entropy

Isothermal Titration Calorimetry

10.1016/s0040-6031(02)00547-6

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The thermodynamic properties of ruthenium on ITS-90

Calphad (1995)

J. W. Arblaster

Debye model

Debye

Standard molar entropy

10.1016/0364-5916(95)00031-9

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Low- and high-temperature heat capacity of metallic technetium

The Journal of Chemical Thermodynamics (2023)

J. Zappey Emily E. Moore O. Beneš J.‐C. Griveau R.J.M. Konings

The heat capacity of technetium metal has been measured from 2.1 K to 293 K using relaxation calorimetry and the enthalpy increment up to 1700 K using drop calorimetry. The low-temperature calorimetry measurements revealed a superconducting transition temperature of TC = (7.76 ± 0.08) K. The zero-degree Debye temperature(θE) and the electronic heat capacity coefficient (γe) of the normal state were derived as (307 ± 5) K and (4.22 ± 0.20) mJ·K−2·mol−1, respectively. The standard entropy of the superconducting standard state was derived as S m◦ (298.15) = (40.9 ± 1.3) J·K−1·mol−1. The fitting of enthalpy-increment data together with high-temperature heat capacity data reported in literature yielded a heat capacity equation up to 1700 K.

Debye model

Standard molar entropy

Specific heat

10.1016/j.jct.2023.107200

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