/* volumetric heat capacity of amorphous SiO2
/* T(K), C (J/cm^3-K)
          71.13      0.3676561
          91.32      0.5153438
         115.54      0.6862975
         132.77      0.8040063
         150.25      0.9164734
         166.51       1.014319
         195.25        1.17341
         233.65       1.362847
          263.5        1.49527
         295.05       1.620335
         344.04       1.795979
            400       1.987256