In-situ investigation of magnesium aluminophosphate synthesis by synchrotron X-ray powder diffraction

Abstract

Time-resolved synchrotron X-ray powder diffraction was used to study synthesis of magnesium substituted aluminophosphates. Four organic template molecules were applied, which resulted in different reaction products. Triethylamine: MAPO-5 and MAPO-47. Di-n-propylamine: MAPO-39 and MAPO-46. Tripropylamine: MAPO-36. Tetramethylammonium hydroxide: MAPO-20. Some synthesis passed through the formation of precursor phases. A precursor observed in the lower temperature range of the synthesis was Mg(H2O)4[Al(PO3OH)OH](H2O) 2. © Acta Chemica Scandinavica 1997.