ELEMENT      % BY WEIGHT
-----------------------------------------
Aluminum               7.3
Calcium                   8.5
Chromium              0.2
Iron                        12.1
Magnesium           4.8
Manganese           0.2
Oxygen                40.8
Potassium             0.1
Silicon                  19.6
Sodium                  0.3
Titanium                4.5
                                ----
                              98.4