Calcium strontium titanate close in composition to Cat.,Sr,TiOs where x = 0.02 s x s 0.2 has been synthesized. The titania based ceramic material useful in 'Synroc' technology of radioactive waste management contains perovskite phase. The other two phases present in the ceramic precursor are hollandite (BaA12Ti60irJ and zirconolite (ZrCaTizOT). Sr" is one of the most heat and 6 activity generating radioactive element present in high level nuclear waste (HLW). Sr is crystallochemically incorporated via a simple substitution for calcium in perovskite type structures. To simulate the crystallochemical mechanism, the strontium loaded perovskite phase has been synthesized through oxide route by heating equimolar quantities of calcium and titanium oxides with 0.02 moles of strontium at 1150" C for 6 hrs. The sintered phase was pelletized and reheated three times to obtain the title polycrystalline material. The calcium strontium titanate phase so prepared has been characterized by x-ray powder diffraction, scanning electron microscopy and energy dispersive spectroscopy (SEM/EDS). Energy dispersive x-ray fluorescence (EDXRF) study has been carried out to study the elemental profile of the synthetic phase. It has been found by leaching studies for 90 days that about 86% of Sr'+is fixed crystallochemically in the perovskite phase. Energy dispersive analysis confirm 1.5 atomic % of Sr" in the polycrystalline material, The Rietveld Refinement of the phase show wRp around 9.59% and Rp=7.25%. The Ca-0 and Ti-0 bond distances calculation using GSAS show values 3.20 and 1.93A respectively.