Origin of Low-${}^{26}\mathrm{Al}/{}^{27}\mathrm{Al}$ Corundum/Hibonite Inclusions in Meteorites

Steven J. Desch, Emilie T. Dunham, Ashley K. Herbst +5

Most meteoritic calcium-rich, aluminum-rich inclusions (CAIs) formed from a reservoir with ${}^{26}\mathrm{Al}/{}^{27}\mathrm{Al}\approx 5\times 10^{-5}$, but some record lower $({}^{2…