Roadmap of photoluminescence and distinct phases of CaxCe(1-x)SO4 in natural and engineering environment.

CaSO4 occurs in various phases. The most common and stable phase is the gypsum phase and anhydrite phase. It is well known that the different phases show different luminescence properties. Ce3+ can be easily induced in the anhydrite phase of CaSO4 at 400°C in a redox environment. However, at various temperatures, the photoluminescence of CaSO4 doped with cerium changes its intensity. The molar concentration of the compound and dopant also plays an important role in forming the distinct phases of CaSO4: Ce. A substantial change in CaSO4:Ce phases occurred when it is prepared in the controlled environment. The computational calculations also show that the concentration of dopants plays a vital role in changing the phase of CaSO4. This also changes the photoluminescence properties. The preparation procedure, photoluminescence spectra, and the distinct phases are discussed in this paper. [ABSTRACT FROM AUTHOR]