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A Corrective Addendum on Previously Reported Small Spheres in the Meteorites Zagami and Murchison

We have reported the finding of small spherical grains (diameters 30-50 μm) in the meteorites Zagami and Murchison [1]. The spheres were analysed by X-ray diffraction. The results obtained were found to fit reasonably well with the results expected from (Ca, RE)F2 and CaS. In the present corrective letter we compare our results from X-ray diffraction analysis with the results of microprobe studies. Surprisingly, the analysis by microprobe disclosed the absence of both Ca and S in the spheres, and the presence of Ce, La, Nd, Gd, and Fe. We are thus forced to conclude that our preliminary interpretation of the X-ray films may not be correct. We present experimental results showing that it is difficult to reconcile the results obtained by microprobe analysis with the X-ray data.