Heat Capacity and Additional Thermodynamic Functions

Cp=heat capacity, S = entropy, H = enthalpy, G = Gibbs free energy. 

No evidence of a Cp anomaly was observed for single crystals in internal fields of 200 to 700 Oe at temperatures near 4.5 K [12], where a magnetic transition might be expected. 

Enthalpies measured from 298 to 1680 K in a copper block drop calorimeter vary nearly linearly with the temperature  

00 = 232 K is derived from ultrasound velocities at 77 K, Shapira, Reed [18], and 0q = 22O K results from the thermal expansion above room temperature, Dudnik et al. [2], cf. Lashkarev etal. [3]. Cp measurements below 20 K yield 0o = 18OK, Busch etal. [11]. 0o=153 9K is based on an average 300 K Debye-Waller factor, Subhadra, Sirdeshmukh [19]. 

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