CEMOXI is a set of synthetic standards that will handle fused bead major element analysis of cement final product and cement raw materials. CEMOXI can be used as a primary fused bead calibration or to verify customer in-house standards for pressed powder applications. The PANalytical Axios spectrometer coupled with the CEMOXI standards and the SuperQ software FP algorithm makes up a unique system that consistently produces very high quality major and minor element analyses in a wide variety of cements and the raw materials used in its manufacture, including limestone, clay/shale and gypsum. The CEMOXI standards set comprise nine multi-element synthetic “cement” standards. The standards are delivered as powders to be prepared as fused beads by the customer, using the customer’s flux, dilution ratios and methodology. The standard CEMOXI-00 should be a fused bead of the customer’s own flux. They are therefore suited and applicable to every cement industry laboratory. It is recommended to fuse the standards in duplicate and in separate fusion batches. CEMOXI oxides and their concentration ranges (wt%) Na2O , 0 – 1.0 , MgO , 0 – 6.0 , Al2O3 , 0 – 10 , SiO2 , 0 – 24 , P2O5 , 0 – 0.5 , SO3 , 0 – 59 , K2O , 0 – 2.0 , CaO , 0 – 70 , TiO2 , 0 – 1.0 , Mn2O3 , 0 – 0.28 , Fe2O3 , 0 – 7.0 , ZnO , 0 – 0.25 , SrO , 0 – 0.7