Thermodynamic properties of holmium monogermanide

The heat capacity and enthalpy of HoGe is investigated for the first time over a temperature range between 51.62 and 2096 K. The values of heat capacity, entropy, reduced Gibbs energy (J · mole−1 × × K−1), and enthalpy (J · mole−1) are determined at 298.15 K: C °P(T) = 49.63 ± 0.20; S °(T) = 89.1 ± 0.7; Φ′(T) = 50.9 ± 0.8; H °(T) − H °(0 K) = 11391 ± 57. Temperature dependences of enthalpy (J · mole−1) for holmium monogermanide are determined as follows: H °(T) − H °(298.15 K) = 8.474 × × 10−3 · T2 + 47.13 · T + 226747 · T−1 − 15565 and H °(T) − H °(298.15 K) = 88.91 · T − 26507, for 298.15–1765 K and 1951–2096 K, respectively. The enthalpy and entropy of HoGe melting are calculated: Tm = 1765 ± 35 K, ΔHm = 36.3 ± 2.9 kJ · mole−1, ΔSm = 20.5 ± 1.6 J · mole−1 · K−1.