SmSe g

The datum is included in Appendix E, since it was calculated with non-TDB auxiliary data. 

The entropy of SmSe(g) at 298.15 K was calculated to beS°(SmSe, g, 298.15 K) = 281.8 J K mol by Kovalevskaya, Sidorenko, Lysenko, and Fesenko [75KOV/S1D]. The entropy value is not selected because all parameters required for the calculation using statistical mechanics were estimated. 

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IGOR/FES] is likely to be in error. The enthalpy of formation of SmSe(g) was ealcu-lated from the enthalpy of atomisation in [74NAG/SHI] (corrected to 298.15 K by adding 3 kJ mol , estimated by the review), the selected value of the enthalpy of formation of Se(g), and the enthalpy of formation of Sm(g) in [82WAG/EVA] yielding Af//° (SmSe, g, 298.15 K) = (112.2 + 15.6) kJ-moP. Since the accuracy of the estimated thermal data cannot be ascertained the review adopts a rounded value for the enthalpy of formation of SmSe(g) with increased error bars... 

Substitution of the cation in the solid solution system Smi R Se by, e.g., Y or La reduces the lattice parameter and the 4f-5d excitation gap, without yielding the transition into the metallic intermediate-valence phase (Gronau 1979). In fig. 3 we show the polarized Raman spectra of Smj jjY Se at 80K for x = 0, 0.25, 0.50, 0.75 and 1.0, obtained by Giintherodt et al. (1981a). For the sake of completeness, Sm, jLag jSe has also been included. For the latter sample one observes below 200 cm first-order defect-induced Raman scattering from acoustic and optical phonons which is absent in pure SmSe. The / = 1 peak of Smo gjLap osSe has drastically broadened compared to that of pure SmSe at... 

Atomic susceptibilities Xa in cm /[mol Sm] are composition. . SmSe 22 SmSei 26 SmSei 31 SmSe 33 SmSei 34 SmSei 43 SmSe 43 SmSei g... 

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