Lattice parameters temperature dependence

Figure 2 shows the lattice parameter a dependence on temperature for a fullerite Cgo sample, saturated with helium to a high content. 

The picture therefore remains obscure. The degree of localization may well depend on variable factors such as the purity of the surface (ultra high vacuum is now known to be essential), the temperature, and the magnitude of the lattice parameters relative to the (rather large) size of the xenon atom. 

Figure 9.6. (a) The temperature dependence of the flow stress for a Ni-Cr-AI superalloy containing different volume fractions of y (after Beardmore et al. 1969). (b) Influence of lattice parameter mismatch, in kX (eflectively equivalent to A) on creep rupture life (after Mirkin and Kancheev... 

The dependence of birefringence on the temperature seems to be correlated to the temperature dependence of the lattice parameters ratio c/a shown in Fig. 102. 

At high temperatures, the module of the pyroelectric constants of both compounds increases more significantly and reaches an extremum at about 480K. Fig. 113 shows the temperature dependence of the pyroelectric coefficients. This phenomenon could be related to the change in dilatation mechanism that was observed while investigating the temperature dependence of the lattice parameters (see Fig. 102). 

Fig. 38. Temperature dependence of the lattice constants a, b, c and the unit cell volume V of [Fe(2-pic)3]Cl2 CH3OH. The solid lines are calculated using the parameter values of Table 20. According to Ref. [39]...

Aikawa N., Kumazawa M., and Tokonami N. (1985). Temperature dependence of intersite distribution of Mg and Fe in olivine and the associate change of lattice parameters. Phys. Chem. Minerals, 12 1-8. 

A similar continuity in the Tj s through the melting temperature was previously reported for linear polyethylene. (17) We have now investigated the temperature dependence of this quantity, for this polymer, in more detail and have also studied a low density (branched) polyethylene. The results for the poly-ethylenes are summarized in Fig. 8. The new data reported here substantiate the conclusion previously reached for linear polyethylene. A similar conclusion can now be reached for the baclc-bone carbons of low density (branched) polyethylene. The melting temperature for this particular sample, under the crystallization conditions studied, is less than 110°C. (33) Thus, the spin-lattice relaxation parameters for the bac)cbone carbons are the same for both the linear and branched polymers over the temperature range studied here. Changes that occur in Tq as the temperature is reduced below 0°C involve other considerations and will be discussed in detail elsewhere. (22)... 

Figure 4.24 (a) Temperature dependence of the Eg phonon mode of TbV04 in Raman scattering. (After Elliott et al, 1972.f, (b) temperature variation of lattice parameters of TbVO. (After Will et al, 1972.)... 

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