IRON-FORMATION SAMPLES AND THE FIVE-MODE METHOD

Newly available analytical data on iron-formation reference samples are combined with values published earlier, in order to test the effectiveness of a revised version of the 'five-mode" method of evaluation, with the well-established sample IF-G as reference. The same method is then applied to improve the earlier evaluation of samples FeR-1, -2, -3 and -4. The resulting values are compared with those in the original evaluations. Better results are obtained than were possible with earlier versions of the method, but some problems do persist.