Synthesis, dopant solubility, and thermostructural properties of CaTM(VO) (TM = Co, Cu) as function of transition metal content.

Crystals of CaTM(VO) (TM = Co, Cu), belonging to the whitlockite family, were synthesized by solid-state reaction and studied as a function of the TM content () for the first time. The structure was refined at ambient conditions and at high temperatures up to 1200 K using the Rietveld method. The unit cell size significantly decreases with increasing TM content up to the solubility limit, , which is 0.

The crystal structure and thermal expansion of novel substitutionally disordered CaTM(VO) (TM = Co, Cu) orthovanadates.

The whitlockite-related materials have attracted researchers' attention because of their potential application in various fields, especially in optoelectronics. In the present work, the structure of novel whitlockite-related oxides CaTM(VO) (TM = Co, Cu) is studied at room and high temperatures, using X-ray powder diffraction. These compounds form by fractional substitution of divalent transition metal atoms into the Ca(VO) lattice.