| 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 cm-1 @ 20 μm (2) |
| Reststrahlen Peak | 82 to 100 μm |
| dn/dT | -50 x 10-6/°C |
| dn/dμ | 2.1 μm |
| Density | 3.12 g/cc |
| Melting Point | 682°C |
| Thermal Conductivity | 2.1 W m-1 K-1 @ 298 K |
| Thermal Expansion | 43 x 10-6/°C @ 298 K |
| Hardness | Moh 5 |
| Specific Heat Capacity | 313 J Kg-1 K-1 |
| Dielectric Constant | 4.94 at 2 MHz |
| Young's 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 | 127.5 g/100 g water at 273K |
| Molecular Weight | 166.02 |
| Class/Structure | Cubic FCC, NaCl, Fm3m, (100) cleavage |
| μm | No | μm | No | μm | No |
|---|---|---|---|---|---|
| 0.302 | 1.82769 | 8.840 | 1.6218 | 22.00 | 1.5895 |
| 0.405 | 1.71843 | 10.02 | 1.6201 | 23.00 | 1.5858 |
| 0.546 | 1.67310 | 11.79 | 1.6172 | 24.00 | 1.5819 |
| 0.768 | 1.6494 | 12.97 | 1.6150 | 25.00 | 1.5775 |
| 1.014 | 1.6396 | 14.14 | 1.6127 | 26.00 | 1.5729 |
| 2.360 | 1.6295 | 15.91 | 1.6085 | 27.00 | 1.5681 |
| 3.540 | 1.6275 | 18.10 | 1.6030 | 28.00 | 1.5629 |
| 4.130 | 1.6268 | 19.00 | 1.5997 | 29.00 | 1.5571 |
| 5.890 | 1.6252 | 20.00 | 1.5964 | ||
| 7.660 | 1.6235 | 21.00 | 1.5930 |
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