FOR ENQUIRIES
+44(0) 1202 307650
Designed and manufactured in the UK

0 Items : £0.00

Strontium Fluoride (SrF2)

♦ Strontium Fluoride (SrF2) Data Sheet   ♦ Strontium Fluoride (SrF2) MSDS

Strontium Fluoride has only specialist applications. Optically, Strontium Fluoride has properties intermediate to Calcium and Barium Fluoride.


Transmission Range : 0.15 to 11 μm
Refractive Index : 1.439 at 0.55 μm (1)
Reflection Loss : 6.3% at 0.55 μm (2 surfaces)
Absorption Coefficient : <1 x 10-3 cm-1 at 5 μm
Reststrahlen Peak : 46 μm
dn/dT : -12 x 10-6 /°C
dn/dμ = 0 : n/a
Density : 4.24 g/cc
Melting Point : 1450°C
Thermal Conductivity : 8.3 W m-1 K-1 at 293K (2)
Thermal Expansion : 18.4 x 10-6 /°C at 293K
Hardness : Knoop 154 (100) & 140 (110)
Specific Heat Capacity : 543 J Kg-1 K-1
Dielectric Constant : 7.69 at 2 MHz
Youngs Modulus (E) : 89.91 GPa
Shear Modulus (G) : 34.6 GPa
Bulk Modulus (K) : 24.65 GPa
Elastic Coefficients : C11=124; C12=45; C44=31.7
Apparent Elastic Limit : 36.5 MPa (5300 psi)
Poisson Ratio : 0.25
Solubility : 0.012g/100g water at 27°C
Molecular Weight : 125.62
Class/Structure : Cubic Fm3m (#225) Cleaves on (111)

To download this data or our MSDS safety data sheet as a pdf, please click on the links at the top of the page.  To expand the transmission graphs, please click on the image.

Click to access current Strontium Fluoride Stock Windows



Strontium fluoride is produced by the vacuum Stockbarger growth technique.

REFERENCES:
(1) Handbook of Optical Constants, ed Palik, V3, ISBN 0-12-544423-0

(2) For Thermal Conductivity (Tc) a figure of 1.42 W/(mK) is in wide circuation but is plainly incorrect based on observation of UKRI STFC (2019) plus logically the Tc should be intermediate between BaF2 and CaF2.  OSTI.GOV  gives (p44) 0.016 cal cm-1 s C-1 for 25°C which converts to 6.7 W m-1 K-1. OSA PUBLISHING confirms (p95) our existing Tc for CaF2 as 9.71W m-1K-1 and offers for SrF2 as 8.3 W m-1 K-1