Pr3+-doped YLF crystal is a favorable solid-state laser gain media for approaching laser in the visible spectrum by directly pump.

YLF properties:

Chemical Formula LiYF4
Lattice Parameters a=5.16Å,c=10.85Å
Crystal structure Tetragonal
Space group I41/a
Knoop hardness 300kg/mm2
Melting point 819℃
Density 3.99g/cm2
Modulus of Elasticity 85GPa
Thermal expansion coefficient

8.3*10-6/K along c axis

13.3*10-6/K along a axis

Thermal conductivity
0.063w/cm K
Specific heat 0.79J/g K