In this study we examine variations in the structure of perovskite compounds of LaBa 2 Cu 2 O 9 , LaBa 2 CaCu 3 O 12 and LaBa 2 Ca 2 Cu 5 O 15 synthesized using the solid state reaction method. The samples' compositions were assessed using X-ray fluorescence (XRF) analysis. The La: Ba: Ca: Cu ratios for samples