Lithium iodate (LiIO3) is a chemical compound that forms a negative uniaxial crystal that can be used 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 is 2.8·10−5/°C (a-axis) and 4.8·10−5/°C (c-axis). Its transition to β-form begin at and it is irreversible.
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