Optical constants of CRYSTRAN - Optical materials
LaF3 - Lanthanum fluoride (o)
Complex refractive index (n+ik)
Derived optical constants
Conditions
orientation: o
Comments
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.
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.
REFERENCES:
(1) Jones and Shand, J.Crys.Growth. 2 (1968) p3611
(2) Sher, Solomon, Lee, and Meuller. Phys.Rev. 144, p593 (1966)
(3) Electronic Processes in Ionic Crystals (OU Press, NY, 1940) p.41
Optical data are for ordinary ray (o).
References
Crystran Ltd.
The Crystran handbook of infra-red and ultra-violet optical materials (5th edition, 2023)
See also
Crystran LaF3 online data sheet
Data
Additional information
Properties of LaF3 - Lanthanum fluoride (o)
density:
-
value: 5940
thermal_expansion:
-
direction: para
temperature: 298
value: 1.1E-5
-
direction: perp
temperature: 298
value: 1.58E-5
hardness:
-
type: Moh
value: 4.5
melting_point:
-
value: 1766
thermal_conductivity:
-
temperature: 300
value: 5.1
solubility:
-
value: 0