Synthesis and thermal stability of rare earth compounds REF3, REF3·nH2O and (H3O)RE3F10·nH2O (RE = Tb − Lu, Y), obtained from sulphide precursors

Exploration of structural, thermal and spectroscopic properties of self-activated sulfate Eu2(SO4)3 with isolated SO4 groups

“…It is well known, that rare earth salts precipitation from aqueous solutions inevitably leads to the formation of a mixture of crystalline hydrates [70,71]. Then, the main problems in the anhydrous salts formation by the thermal decomposition of their crystalline hydrates are the complete removal of all crystalline hydrate water molecules and the absence of pyrohydrolysis processes [72,73]. The oxidation and pyrohydrolysis of inorganic salts commonly proceed with the heat development [74,75].…”

Synthesis of Samarium OxysulfateSm2O2SO4 in the High-Temperature Oxidation Reaction and Its Structural, Thermal and Luminescent Properties

“…As it is known from the reported results, the initial material granules, under certain conditions, are able to maintain the original shape and size in the thermal decomposition process [28][29][30]. At the same time, the compounds with the stoichiometric lanthanide ion content attract attention in order to find efficient luminescent materials with low concentration quenching and to investigate specific mechanisms of luminescence quenching in them [31][32][33][34][35][36][37][38][39][40]. At the same time, the consideration of lanthanide-containing materials cannot be restricted only by their luminescent properties.…”

Synthesis and Upconversion Luminescence in LaF3:Yb3+, Ho3+, GdF3: Yb3+, Tm3+ and YF3:Yb3+, Er3+ obtained from Sulfide Precursors

“…The precipitates of the RE F 3 compounds were separated from the solution by decanting, followed by washing with distilled water to pH = 6.6. The neutral RE F 3 powders were dried at 100 °C in air for 5 h, followed by annealing at 700 °C for 30 min in fluoropolymer decomposition vapor …”

“…RE F 3 and NaYF 4 were obtaining from sulfide precursors via the reaction with hydrofluoric acid . The fluorides of rare earth elements obtained by this method do not contain RE OF , .…”