Coexisting clinopyroxene, orthopyroxene, and garnet from a lens of eclogitic rocks of Norway are analysed for their Mg, Ni, Co, Zn, Fe, and Mn contents. Examination of their distribution among these three phases reveals that: 1) in the pair orthopyroxene-clinopyroxene, the partition is essentially controlled by the size of the cations, so that, as far as the moderate-sized ions as listed above are concerned (except for Mn) , the smaller ions prefer clinopyroxene, and 2) in the pair garnet-clinopyroxene, the partition is controlled by two factors, i.e. that the larger ions prefer garnet and that the less electronegative ions are excluded from garnet.
Notes. Distribution of some elements among minerals of Norwegian eclogites.