Fig. 1: Design and structural characterization of ultra-high entropy phosphates MXPOs.
From: Ultra-high entropy rare earth phosphate against environmental corrosion
a Periodic table highlighting all the elements used for the synthesis of MXPOs, color-coded according to the ground state crystal structure of the respective elemental phosphates. The cations considered for use here encompass almost the vast majority of lanthanide rare earth elements. b The phosphates of the selected rare earth cations have different crystal structures. Those with larger ionic radii tend to form monazite structures, and vice versa tend to form xenotime structures. In addition, an anhydrite structure exists as a transition state where the two phases transform into each other (PT = Phase transition). c Optical digital photographs of the prepared MXPOs ceramic pellets and (d) the corresponding XRD crystal structure analysis diagrams. (for further detail see Supplementary Note. 2 and 3). e Descriptor for rare earth phosphates of complex composition. The phase state and C values of complex-simple composition phosphates currently synthesized using the M + X hybrid model was collected. where MPO and XPO calculations of C-values are meaningless and are schematized using gray dots. Data beyond the square points are from the composition and structure of high, medium, and low entropy value phosphates29,40,49,50. (for further data see Supplementary Table. 4).
