Lithium iodate

Lithium iodate (LiIO₃) is a negative uniaxial crystal^[1] for nonlinear, acousto-optical and piezoelectric applications. It has been utilized for 347 nm ruby lasers.^[9][10]

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
3D model (JSmol)	Interactive image
ChemSpider	141432 Y
ECHA InfoCard	100.033.954
EC Number	237-365-2
PubChem CID	3084149
UNII	1685PBD1HF Y
UN number	1479
CompTox Dashboard (EPA)	DTXSID601014446 DTXSID30925318, DTXSID601014446
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	LiIO3
Appearance	White hygroscopic crystals
Odor	Odorless
Density	4.487 g/cm3[1]
Melting point	420–450 °C (788–842 °F; 693–723 K)[1][2][3]
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)[1] Hemihydrate: 80.2 g/100 mL (18 °C)[4]
Solubility	Insoluble in EtOH[2]
Magnetic susceptibility (χ)	−47.0·10−6 cm3/mol
Thermal conductivity	1.27 W/m·K (a-axis) 0.65 W/m·K (c-axis)[1]
Refractive index (nD)	1.8875 (20 °C) 1.6 (RT) nHe–Ne: 1.8815 (20 °C)[1] 1.5928 (RT)[5]
Structure
Crystal structure	Hexagonal,[2] hP10[6]
Space group	P6322, No. 182[6]
Point group	622[6]
Lattice constant	a = 5.46(9) Å, c = 5.15(5) Å[6] α = 90°, β = 90°, γ = 120°
Hazards
GHS labelling:
Pictograms	[7]
Signal word	Danger
Hazard statements	H272, H315, H319, H335, H360[7]
Precautionary statements	P201, P220, P261, P305+P351+P338, P308+P313[7]
NFPA 704 (fire diamond)	[8] 2 0 2
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is YN ?) Infobox references

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).^[1] Its transition to β-form begin at 50 °C (122 °F) and it is irreversible.^[3]