Calcium Fluoride ( CaF₂ )

Reference: NIST Structural Ceramics Database

Note: About Property Data Summaries.

Note: Abbreviations and Other Notes

Note: Other Materials

Material Summary:
                      [Ref. 1a]                [Ref. 1b]                [Ref. 1c, 2]        
Manufacturer........: Unknown                  Harshaw Co.              Eastman Kodak Co.
Material Designation: calcium fluoride;        calcium fluoride;        calcium fluoride;
                      also known as fluorspar  also known as fluorspar  also known as fluorspar
Material Form.......: Single Crystal           Polycrystal              Single Crystal
Composition.........: CaF2                     CaF2                     CaF2
Processing..........: 



References:
   [1] P. F. Becher and S. W. Freiman, "Crack Propagation in Alkaline-Earth Fluorides"
       Journal of Applied Physics, Vol. 49, No. 7, pp. 3779-3783 (1978).
   [2] R. W. Rice, S. W. Freiman, and J. J. Mecholsky, "The Dependence of Strength-Controlling
       Fracture Energy on the Flaw-Size to Grain-Size Ratio"
       Journal of the American Ceramic Society, Vol. 63, No. 3-4, pp. 129-136 (1980).



Property Table:
Temperature = 23 °C

Grain    Porosity    Fracture      Fracture   Measurement  Measurement  Comments
Size                 Toughness     Energy     Method       Environment
[µm]       [%]       [MPa·m1/2]     [J/m2] 
------   --------   ------------   ---------  -----------  -----------  --------------------------------
                                    0.51        AMDCB          air       Ref. 1a Crack plane {111} and
                                                                                 crack direction [1-1c]
                                    0.51        AMDCB                    Ref. 1a Crack plane {111}
                                                                                 crack direction [1-1c]; 12Eu
                                                                                 impurity
                                    0.80        AMDCB                    Ref. 1a Material unannealed and crack
                                                                                 plane {111}, crack direction [112]
                                    0.52        AMDCB                    1,a Material annealed and gamma-crack
                                                                                 plane {111}, crack direction [112]
                                    1.6         AMDCB                    Ref. 1b Material hot worked and crack
                                                                                 plane {111}
50-100                              3.6         AMDCB                    Ref. 1c Material hot pressed and crack
                                                                                 plane n{111}
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75         0.1                      3.3         AMDCB          air       Ref. 2; hot pressed material.
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