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Potassium Iodide (KI)

♦ Potassium Iodide (KI) Data Sheet   ♦ Potassium Iodide (KI) MSDS

Potassium Iodide has few specific applications but has some uses in the very deep Infra Red.

Transmission Range :0.38 to 35 μm
Refractive Index :1.6201 at 10 μm (1)
Reflection Loss :10.6% at 10 μm (2 surfaces)
Absorption Coefficient :4.5 x 10-3 @ 20 μm (2)
Reststrahlen Peak :82 to 100 μm
dn/dT :-50 x 10-6 /°C
dn/dμ = 0 :2.1 μm
Density :3.12 g/cc
Melting Point :682°C
Thermal Conductivity :2.1 W m-1 K-1 at 298K
Thermal Expansion :43 x 10-6 /K at 298K
Hardness :Moh 5
Specific Heat Capacity :313 J Kg-1 K-1
Dielectric Constant :4.94 at 2 MHz
Youngs Modulus (E) :31.49 GPa
Shear Modulus (G) :6.2 GPa
Bulk Modulus (K) :12 GPa
Elastic Coefficients :C11=27.4; C12=4.3; C44=3.7
Apparent Elastic Limit :n/a
Poisson Ratio :n/a
Solubility :127.5g/100g water at 273K
Molecular Weight :166.02
Class/Structure :Cubic FCC, NaCl, Fm3m, (100) cleavage

To download this data or our MSDS safety data sheet as a pdf, please click on the links at the top of the page.  To expand the transmission graphs, please click on the image.


µm   Noµm   Noµm   No
0.302   1.827690.405   1.718430.546   1.67310
0.768   1.64941.014   1.63962.360   1.6295
3.540   1.62754.130   1.62685.890   1.6252
7.660   1.62358.840   1.621810.02   1.6201
11.79   1.617212.97   1.61514.14   1.6127
15.91   1.608518.10   1.60319.00   1.5997
20.00   1.596421.00   1.59322.00   1.5895
23.00   1.585824.00   1.581925.00   1.5775
26.00   1.572927.00   1.568128.00   1.5629
29.00   1.5571

Potassium Iodide is produced in large ingots by the Kyropoulos growth method. Potassium Iodide cleaves easily. Potassium Iodide is only useful in controlled laboratory conditions as it is very soft and very water soluble.

REFERENCES:
(1) K.Korth, Z.Physik. Vol 84, p677-685 (1933)
(2) H.H.Li, Absorption Coefficients, Int.J.Therm, V1, No. I, 1980