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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
3D model (Jmol)
ChemSpider
ECHA InfoCard 100.033.954
EC Number 237-365-2
PubChem CID
UN number 1479
Properties
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)
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
−47.0·10−6 cm3/mol
Thermal conductivity 1.27 W/m·K (a-axis)
0.65 W/m·K (c-axis)
1.8875 (20 °C)
1.6 (RT)
nHe–Ne:
1.8815 (20 °C)
1.5928 (RT)
Structure
Hexagonal,hP10
P6322, No. 182
622
a = 5.46(9) Å, c = 5.15(5) Å
α = 90°, β = 90°, γ = 120°
Hazards
GHS pictograms The flame-over-circle pictogram in the Globally Harmonized System of Classification and Labelling of Chemicals (GHS)The exclamation-mark pictogram in the Globally Harmonized System of Classification and Labelling of Chemicals (GHS)The health hazard pictogram in the Globally Harmonized System of Classification and Labelling of Chemicals (GHS)
GHS signal word Danger
H272, H315, H319, H335, H360
P201, P220, P261, P305+351+338, P308+313
Oxidizing Agent O Toxic T
R-phrases R8, R36/37/38, R61
S-phrases S17, S22, S36/37/39, S45, S53
NFPA 704
Flammability code 0: Will not burn. E.g., water Health code 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g., chloroform Reactivity code 2: Undergoes violent chemical change at elevated temperatures and pressures, reacts violently with water, or may form explosive mixtures with water. E.g., phosphorus Special hazards (white): no codeNFPA 704 four-colored diamond
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
YesY  (what is YesYN ?)
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.

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.


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