Refinement of the crystal structure of some rare earth vanadates RVO4 (R = Dy, Tb, Ho, Yb)

Hydrothermal Synthesis of Lanthanum Vanadates: Synthesis and Crystal Structures of Zircon-Type LaVO4 and a New Compound LaV3O9

“…Kitayama and co-workers (1) made extensive studies of the phase diagrams for Ln O }V O } V O systems and reported the existence of some lanthanide vanadates other than LnVO , but their crystallographic details have remained unknown. The orthovanadate crystallizes in two types, namely, tetragonal zircon (ZrSiO ) type (2) and monoclinic monazite (CePO ) type (3). Generally the larger Ln> ion prefers the monazite type due to its higher oxygen coordination number of 9 as compared…”

Monazite and Zircon Type LaVO4:Eu Nanocrystals – Synthesis, Luminescent Properties, and Spectroscopic Identification of the Eu3+ Sites

“…Among the rare-earth-functional materials, lanthanide orthovanadate is an important family and has attracted great interest because of their various technological applications in catalysts, [9] polarizers, [10] laser host materials, [3] and phosphors. [11] The lanthanide orthovanadates crystallize in two phases, namely, a tetragonal phase (t-) with a zircon structure [12] and a monoclinic phase (m-) with a monazite structure. [13] Generally, the larger Ln 3+ ion prefers the monazite structure owing to its higher oxygen coordination number of 9 compared to 8 of the zircon type.…”

Die Kristallstrukturen von Yttrium-Vanadat, Lutetium-Phosphat und Lutetium-Arsenat

“…Strukturbestimmungen des Arsenats, Phosphats und Vanadats von Yttrium und anderen Seltenen Erden sind aus der Literatur bekannt: Broch (1933), Schwendimann & Strada (1934), Krstanovi6 (1965, Baglio & Gashurov 1968), Fuess & Kallel (1972). Die Raumugrppe ffir die Strukturen von YVO4, LuPO4 und LuAsO4 ist 14~/amd.…”