LaCeNdPO4

LaCeNdPO4 is a mixed lanthanide phosphate compound in which three trivalent cations—lanthanum (La3+), cerium (Ce3+), and neodymium (Nd3+)—occupy the rare-earth site of the phosphate lattice. The chemical formula represents a solid solution on the RE site of the REPO4 family, with the phosphate (PO4)3- groups forming a three-dimensional framework that is charge-balanced by the cations. Depending on synthesis and composition, LaCeNdPO4 can crystallize in a monazite-type structure or related REPO4 polymorphs; the exact symmetry may vary with the La:Ce:Nd ratio and the synthesis route.

Synthesis is achieved by solid-state reaction, precipitation, or hydrothermal methods using sources such as La2O3, CeO2, Nd2O3 and phosphoric acid or ammonium phosphate. Typical routes involve mixing stoichiometric oxides or nitrates, followed by calcination at high temperatures to obtain a crystalline phosphate.

Properties of LaCeNdPO4 include the chemical and thermal stability characteristic of rare-earth phosphates. The material may accommodate a range of Ln3+ compositions and can exhibit luminescent properties associated with Ce3+ and Nd3+ dopants, making it of interest as a potential luminescent host material. Optical, magnetic, and thermal properties depend on the exact composition and particle size.

Applications discussed in the literature focus on fundamental solid-state chemistry of mixed RE phosphates, potential use as luminescent hosts for dopants, and exploratory materials for waste immobilization or catalysis, though specific performance depends on synthesis and formulation. Related compounds include LaPO4, CePO4, NdPO4 and other REPO4 solid solutions.

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