Research Gallery

Inferred 26Al/27Al ratios for spinel-hibonite spherules from Murchison and Paris and the probability density plot derived from the data. The overall 26Al/27Al range in the two groups of SHIBs is essentially identical, from ~1E−5 up to 6E−5. Three distinctive peaks can be identified in the probability plot at 26Al/27Al=4.9E−5, ~3.5E−5 and 6.5E−5, respectively. Two barely resolved components at 6E−5 and 2.5E−5 are also revealed.