Lithium iodate

Lithium iodate

Skeletal formula of lithium iodate with I—O bond length
Crystal structure of lithium iodate, iodines are inside the unit cell
Names
IUPAC name Lithium iodate
Identifiers
CAS Number	13765-03-2 Y
ChemSpider	141432 Y
EC Number	237-365-2
Jmol 3D model	Interactive image
PubChem	3084149
UN number	1479
InChI InChI=1S/HIO3.Li/c2-1(3)4;/h(H,2,3,4);/q;+1/p-1 Y Key: FZAXZVHFYFGNBX-UHFFFAOYSA-M Y
SMILES [Li+].[O-]I(=O)=O
Properties
Chemical formula	ILiO3
Molar mass	181.84 g·mol−1
Appearance	White hygroscopic crystals
Odor	Odorless
Density	4.487 g/cm3
Melting point	420–450 °C (788–842 °F; 693–723 K)
Solubility in water	Anhydrous: 89.4 g/100 mL (10 °C) 82.7 g/100 mL (25 °C) 78.4 g/100 mL (40.1 °C) 73 g/100 mL (75.6 °C) Hemihydrate: 80.2 g/100 mL (18 °C)
Solubility	Insoluble in EtOH
Thermal conductivity	1.27 W/m·K (a-axis) 0.65 W/m·K (c-axis)
Refractive index (nD)	1.8875 (20 °C) 1.6 (RT) nHe–Ne: 1.8815 (20 °C) 1.5928 (RT)
Structure
Crystal structure	Hexagonal, hP10
Space group	P6322, No. 182
Point group	622
Lattice constant	a = 5.46(9) Å, c = 5.15(5) Å α = 90°, β = 90°, γ = 120°
Vapor pressure	{{{value}}}
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

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 (25 °C; 77 °F) 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 (122 °F) and it is irreversible.