REV3(BO3)4 (RE = La–Nd): a series of rare earth vanadoborates exhibit large birefringence induced by distorted VIIIO6 groups
Abstract
New rare-earth (RE) vanadoborates REV3(BO3)4 were synthesized via high-temperature solid-state methods. They crystallize in a monoclinic system featuring a unique {[V3O14]19−}∞ chain. Magnetic studies reveal antiferromagnetic behavior, while LaV3(BO3)4 exhibits a record birefringence of 0.180@546 nm among RE borates. This work offers a new example for exploring multifunctional RE borate materials.

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