| Abstract
| - The effects of temperature on the cell parameters and structure of RbTi1-xNbxOPO4 (x = 0−0.09) were determined by X-ray powder diffraction and differential thermal analysis. The Curie temperature (Tc) of these crystals was measured by the change in the slope of the evolution of the c cell parameter.
- We used X-ray powder diffraction and differential thermal analysis (DTA) to study theeffects of temperature on the cell parameters and phase transitions in RbTi1-xNbxOPO4 (x= 0−0.9) crystals. The linear thermal expansion coefficients were calculated from the resultsof X-ray diffraction. We determined their Curie temperature (Tc) by the change in the slopeof the evolution of the c parameter of the crystals with the temperature, which is a functionof the Nb content in the crystals. The transition temperature from RTP orthorhombic toRbTiPO5 cubic phase and the decomposition temperature of this cubic phase, which are alsofunctions of the Nb concentration in the crystals, were determined by DTA and X-raydiffraction. Finally, we also studied how the cell parameters of the RTP phase changed asthe concentration of Nb in the crystals was increased at room temperature.
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