Analisis Komposisi Fasa dan Parameter Unit Sel Kristal Hasil Kalsinasi Suhu Tinggi Abu Cangkang (Paguroidea) dengan Metode Rietveld

Mukminin, Amirul

JST ( Jurnal Sains Terapan )
Vol 5, No 1 (2019): JST (Jurnal Sains Terapan )

Quantitative analysis by data refinement   of the Rietveld method for calcium-based catalyst samples from hermit crabs (Paguroidea) ash has been successfully carried out. The results of the improvement showed that the samples of hermit crab shell calcined at 900 ° C gave different phase compositions and unit cell parameters due to the influence of calcination times 2, 3 and 4 hours. 2 hours is a single phase   CaCO3 calcite, 3 hours are multiphase   CaCO3 calcite and CaO, while a  4 hour sample is a single phase CaO . The reliability value (R) of the improvement results,  RP, Rwp, Rexp and GoF = χ2 gives good and acceptable results