This dataset comprises the structural and chemical characterization of the alkali roasting of Eureka Monazite carried out at the University of Leeds during the SoS RARE project (2015-2018). It includes structural data from X-Ray diffraction and Scanning electron microscopy of samples roasted with sodium bicarbonate, thermodynamic calculations for identification of the phases formed during roasting, cyclic voltammetry measurements of samples in a solution of choline chloride-ethylene glycol with a 1:1 molar ratio with 0,1 mol/L glucose and the chemical composition of the samples analysed by inductively coupled plasma spectroscopy.