Lead Fluoride (PbF2)
DownloadLead Fluoride has little optical application. Lead Fluoride has been used as a scintillator material as it has excellent stopping power for gamma rays. Lead is not RoHs compliant and can only be specified under certain conditions.
Transmission Range
250nm to 11 μm
Refractive Index
1.7808 at 11 μm
Reflection Loss
12.8% at 5 μm (2 surfaces)
Absorption Coefficient
0.018 cm-1 @ 4μm
Reststrahlen Peak
n/a
dn/dT
n/a
dn/dμ = 0
3.3 μm
Density
7.77 g/cc (1)
Melting Point
855 °C
Thermal Conductivity
n/a
Thermal Expansion
29 x 10-6 K-1 at 283K
Hardness
Knoop 200
Specific Heat Capacity
301 J Kg-1 K-1
Dielectric Constant
13 at 1 MHz
Youngs Modulus (E)
n/a
Shear Modulus (G)
n/a
Bulk Modulus (K)
n/a
Elastic Coefficients
C11=91; C12=46; C44=23
Apparent Elastic Limit
n/a
Poisson Ratio
N/A
Solubility
0.064g/100ml water at 20°C
Molecular Weight
245.21
Class/Structure
Cubic CaF2, Fm3m, (111) cleavage
| µm | No |
|---|---|
| 0.3 | 1.93665 |
| 0.4 | 1.81804 |
| 0.5 | 1.78220 |
| 0.6 | 1.76489 |
| µm | No |
|---|---|
| 0.7 | 1.75502 |
| 0.8 | 1.74897 |
| 0.9 | 1.74455 |
| 1.0 | 1.74150 |
| µm | No |
|---|---|
| 3.0 | 1.72363 |
| 5.0 | 1.68544 |
| 7.0 | 1.68544 |
| 9.0 | 1.65504 |
Lead fluoride has been grown by vacuum Stockbarger, but is not known to be in regular production. Crystran hold a very small stock of crystal ingot.
REFERENCES
(1) Crystran Data