Lithium iodate

Chemical compound From Wikipedia, the free encyclopedia

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

Quick facts Names, Identifiers ...
Lithium iodate
Skeletal formula of lithium iodate with I—O bond length
Skeletal formula of lithium iodate with I—O bond length
Crystal structure of lithium iodate, iodines are inside the unit cell
Crystal structure of lithium iodate, iodines are inside the unit cell
Names
IUPAC name
Lithium iodate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.033.954 Edit this at Wikidata
EC Number
  • 237-365-2
UNII
UN number 1479
  • InChI=1S/HIO3.Li/c2-1(3)4;/h(H,2,3,4);/q;+1/p-1 checkY
    Key: FZAXZVHFYFGNBX-UHFFFAOYSA-M checkY
  • [Li+].[O-]I(=O)=O
Properties
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]
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]
−47.0·10−6 cm3/mol
Thermal conductivity 1.27 W/m·K (a-axis)
0.65 W/m·K (c-axis)[1]
1.8875 (20 °C)
1.6 (RT)
nHe–Ne:
1.8815 (20 °C)[1]
1.5928 (RT)[5]
Structure
Hexagonal,[2] hP10[6]
P6322, No. 182[6]
622[6]
a = 5.46(9) Å, c = 5.15(5) Å[6]
α = 90°, β = 90°, γ = 120°
Hazards
GHS labelling:
GHS03: OxidizingGHS07: Exclamation markGHS08: Health hazard[7]
Danger
H272, H315, H319, H335, H360[7]
P201, P220, P261, P305+P351+P338, P308+P313[7]
NFPA 704 (fire diamond)
[8]
NFPA 704 four-colored diamondHealth 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g. chloroformFlammability 0: Will not burn. E.g. waterInstability 2: Undergoes violent chemical change at elevated temperatures and pressures, reacts violently with water, or may form explosive mixtures with water. E.g. white phosphorusSpecial hazards (white): no code
2
0
2
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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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]

References

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