Elastic softening in static shear modulii of orientationally disordered (KCN)x(RbCN)1−x mixed crystals

Heat capacity of EuMnO3 and Eu0.7A0.3MnO3 (A=Ca, Sr) compounds

“…It is obvious from the earlier discussion that the agreement between the experimental [11][12][13][14][15][16][17][18][19][20] and the theoretical results on specific heat is reasonably good. This is not unexpected as we have taken into proper account the electronic specific heat term (g) ¼ 10 mJ mol À1 K À4 in our lattice specific heat term.…”

“…We have formulated the RIM by including the effects of the long-range (LR) Coulomb attraction, the short-range (SR) Hafemeister Flygare (HF) type overlap repulsion operative up to second nearest neighbour and Van der Waal's (VdW) interaction due to dipole-dipole interaction [15][16][17]. The total interaction potential (f) is given by…”

Thermoelastic behaviour of orientationally disordered NH4Br

“…The effective interionic potential used to derive the framework of the present ETSM can be expressed as [14,15] ( )…”

“…[31]. The quadrupole electric field gradient interaction A Q and B Q and the SR repulsive interaction parameters A R and B R are calculated using their expressions [31] and the method [15][16][17][18][19][20], and their calculated values are listed in Table 2. The susceptibility χ 11 is related to C 11 and C 12 through A eff , while χ 44 is related to C 44 through B eff .…”

“…It has been applied successfully by Gaur et al [15][16][17][18][19][20][21][22] to explain the elastic, thermal and dynamical properties of the orientationally disordered alkali cyanides, their mixed crystal counterparts and sodium superoxide. Looking to the considerable success and versatility of ETSM, we have applied it for the study of temperature dependence of elastic and thermal properties of orientationally disordered ammonium bromide, probably for the first time.…”