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Facile sonochemical synthesis and photoluminescent properties of lanthanide orthophosphate nanoparticles

“…They appear in hexagonal, tetragonal, and monoclinic modifications. The hexagonal structure is the lowtemperature phase, and it can transform into the monoclinic structure, while the tetragonal structure is stable after calcinations at 900 1C [27,28]. Very recently, much progress has been made to notably increase the luminescent properties of lanthanide compound nanostructures and lanthanide-doped nanoparticles [29], particularly the pioneering research by Haase and coworkers on the lanthanide-doped LnPO 4 (LnPO 4 :Ln 3+ ) nanoparticles [20,30].…”

Intermediate products in solid‐state reactions of gadolinium oxide and ammonium dihydrogen phosphate

“…A very weak lines of gadolinium polyphosphate are also observed in the XRD pattern. The IR spectra analysis of the products at these temperatures show that the deformation band of NH 4 + is appeared at 1400 cm -1 and the vibrational bands of Gd(PO 3 ) 3 and Gd 2 O 3 are also observed beside this band.…”

“…Phosphates are transformed to various other phosphates with hydrolysis and dehydration reactions by heating [1][2][3][4][5]. There are polyphosphate, cyclo phosphate, and ultraphosphate in a group of condensed phosphates.…”

Additional effects of rare earth elements on formation and properties of some transition metal pyrophosphates

“…Phosphates are transformed to other phosphates in hydrolysis and dehydration reactions at elevated temperatures [1][2][3][4][5][6][7]. There are polyphosphate, cyclo-phosphate, and ultraphosphate in a group of condensed phosphates.…”