Abstract The structure family of the rare‐earth calcium oxoborates O[BO 3 ] (RCOB) has been investigated mainly with regard to their optical characteristics. Due monoclinic‐domatic they exhibit pyro‐ and piezoelectric properties, which is not dependent on numerous possible substitutions cation site R . cations are known show partial disorder earth alkaline positions X Z To study whether a stabi...

The temperature dependence of the heat capacity CoFe 2 O 4 ferromagnet and 0.3CoFe -0.7PbTiO 3 multiferroic composite in range 150-820 K has been studied. over a wide range. It is noted that additional component due to transition cobalt or iron ions higher energy levels, as well distortion lattice parameters appearance three coexisting phases. Keywords: capacity, composite, Schottky effect.

A first principles density functional study into the bulk and surfaces properties of MAX-phase early transition metal silicon carbides points to their potential as carbon dioxide hydrogenation catalysts.