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| Lanthanum Fluoride is not often used as an optical material. Lanthanum Fluoride is usually doped with Europium at a nominal level of 0.3% mole. In this form, the usual application is as the active element in an ion-selective electrode for the detection and measurement of Fluoride ions in solution. |
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 Product Data ----------------------------------------------------- |
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| Transmission Range : |
0.2 to 11 μm |
| Refractive Index : |
No 1.506 at 0.55 μm |
| Reflection Loss : |
10.3% at 0.55 μm |
| Absorption Coefficient : |
n/a |
| Reststrahlen Peak : |
n/a |
| dn/dT : |
n/a |
| dn/dμ = 0 : |
n/a |
| Density : |
5.94 |
| Melting Point : |
1493 °C |
| Thermal Conductivity ; |
5.1 W m-1 K-1 at 300K |
| Thermal Expansion ; |
11 x 10-6 /K (para) 17 x 10-6 (perp) |
| Hardness ; |
Moh 4.5 |
| Specific Heat Capacity : |
506 J Kg-1 K-1 |
| Dielectric Constant : |
n/a |
| Youngs Modulus (E) : |
n/a |
| Shear Modulus (G) : |
n/a |
| Bulk Modulus (K) : |
n/a |
| Elastic Coefficients : |
n/a |
| Apparent Elastic Limit : |
n/a |
| Poisson Ratio : |
n/a |
| Solubility : |
Insoluble in water |
| Molecular Weight : |
195.9 |
| Class/Structure : |
Trigonal (hex), P3cl, no cleavage |
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| Refractive Index and Optical Transmittance curve---- |
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 Refractive Index(): |
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| µm |
No |
Ne |
µm |
No |
Ne |
µm |
No |
Ne |
| 0.254 |
1.656 |
1.649 |
0.405 |
1.618 |
1.612 |
0.436 |
1.617 |
1.609 |
| 0.547 |
1.606 |
1.602 |
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Optical
Transmittance Curve of LaF3 (Reference Data): |
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| Product Notes:------------ -------------------------------------- |
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Lanthanum Fluoride is grown as small ingots of about 10mm diameter as it is difficult to anneal. Doped with Europium, it is a pale yellow colour.
Data provided is extracted from our technical handbook of materials. While every attempt has been made to verify the source of the information, ultiQuest Technology accept no responsibility for accuracy of data
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