Lithium iodate

Lithium iodate (LiIO3) is a negative uniaxial crystal for nonlinear, acousto-optical and piezoelectric applications. It has been utilized for 347 nm ruby lasers.

Properties
Mohs hardness of lithium iodate is 3.5–4. Its linear thermal expansion coefficient at 298 K is 2.8·10−5/°C (a-axis) and 4.8·10−5/°C (c-axis). Its transition to β-form begin at 50 C and it is irreversible.