元　素  MgO  B  Si  Na  Cu  Ca  Fe  Ni  Mn  Cr  Zn  Al  S
 含有割合  99.9850%  0.00000%  0.00138%  0.00000%  0.00000%  0.00054%  0.00711%  0.00000%  0.00499%  0.00051%  0.00011%  0.00031%  0.00006%
 酸化物割合  99.9630%  0.00000%  0.00348%  0.00000%  0.00000%  0.00082%  0.02203%  0.00000%  0.00678%  0.00171%  0.00014%  0.00186%  0.00019%