The TmSe-YSe System

3 TmSe-MSe Systems 29.1.2.6.14.3.1 The TmSe-YSe System Crystallographic Properties 

The X-ray absorption spectra (L, ) were studied between 30 K and room temperature. Spectra for Tmo.iYogSe at 35 and 300 K are presented in the paper. The valence of the solid solutions with x = 0.75, 0.90, and 0.95 decreases with decreasing temperature to approximately (read from a figure) v = 2.57, 2.56, and 2.54, respectively, at 35 K, derived from the Lm spectra, Haen et al. [14]. For Mv spectra of Tm. xYxSe with x = 0.80,0.95, 0.99, and 0.996, see Kalkowski et al. [16]. 

Low temperature heat capacity measurements on Tm0.20Y0.80Se are interpreted by an average valence of v = 2.78, Cornut et al. [8]. Low temperature magnetoresistance studies on Tmi xYxSe with x = 0.80 to 0.99 down to 20 mK give v 2.6 to 2.7, Haen etal. [2]. 

The change of the X-ray Mv spectrum of Tmo.o48Yo.952Se as a function of O2 exposure is shown in a figure in the paper of [16] for spectra before and after O2 exposition see also [15]. 

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