What is "lithium niobate"

n. (context chemistry English) the lithium salt of niobic acid, LiNbO₃, whose transparent crystals are used lasers and other optical devices

Lithium niobate is a compound of niobium, lithium, and oxygen. Its single crystals are an important material for optical waveguides, mobile phones, piezoelectric sensors, optical modulators and various other linear and non-linear optical applications.