

Sample 3        Al2O3    ZnO     CaF2    Glass   Total
                 wt%     wt%      wt%      wt%     wt%
    weighed     30.79   19.68    20.06    29.47    100
     XRF        31.06   19.64    19.89    27.14     
    Note - glass content underestimated by XRF due to 
           presence of sodium (not measured) in glass

     
                              


