Notes. Data are from ⁽¹⁾Donaldson Hanna et al. (2019), ⁽²⁾King et al. (2015), and ⁽³⁾Howard et al. (2015); uncertainties on abundances are 2–4% for crystalline anhydrous phases and 3–5% for fine-grained, poorly crystalline phyllosilicates. Phyllosilicate fraction is the normalized abundance of phyllosilicate to total silicate in the CM chondrites (Howard et al. 2015). Ol = olivine. Px = pyroxene. Modal mineralogy is not available for AhS 91_A1. The CI and CM chondrites can be heterogeneous, and the mineralogies reported from King et al. (2015) and Howard et al. (2015) may not share exactly the same modal abundances as the samples whose spectra are shown in Fig. 4 because they are not the same physical samples. Our samples of Orgueil, ALH 83100, and Murchison were measured by Donaldson Hanna et al. (2019), who compared their modal mineralogies to those of King et al. (2015) and Howard et al. (2015) and found them to be consistent within the stated uncertainties. We note that our sample of Orgueil contains less phyllosilicate than has been reported for three other splits of this meteorite, which average 83 vol% (King et al. 2015).