Gallium in chondritic meteorites

Gallium has been determined in ten carbonaceous, six enstatite, and six ordinary chondrites by a neutron activation technique. The following averages (ppm Ga) were obtained: enstatite chondrites, 15.6; type I carbonaceous chondrites, 13.3; type II carbonaceous chondrites, 10.0; type III carbonaceous chondrites, 8.9; ordinary chondrites, 5.4. The fractionation of gallium among these chondrite groups is very similar to that of germanium, and the fractionation of gallium between the sun and the carbonaceous type I chondrites is the same as that of iron.