Manuel's interpretation of our data is refuted by direct experimental evidence. When phase Q is etched away, the 20Ne/22Ne ratio consistently falls (by up to 4 &sgr; for Allende, more for some other meteorites), showing that Q contains a substantial Ne component of characteristic 20Ne/22Ne ratio (10.3¿0.4). A substantial heavy Xe isotope enrichment is also present in Q, as shown by the fall in 136Xe/132Xe on stepped etching: 0.325¿0.004 in the first step, 0.310¿0.003 in the second step. |