Table 1 Inferred 26Al/27Al ratios, initial Δ26Mg0*, and goodness of fit for 18 26Al-bearing ALHA77307 CAIs.

Uncertainties are 2σ. hib, hibonite; pv, perovskite; sp, spinel; mel, melilite; di, diopside rim; and fo, forsteritic olivine.

SampleMinerals26Al/27Al (±2σ)26Mg0*
(‰, ±2σ)
Reduced χ2
019hib(4.86 ± 0.42) × 10−50.05 ± 0.260.3
021hib-pv-sp(0.80 ± 1.65) × 10−50.87 ± 0.442.0
070sp-pv-di-ol(5.12 ± 0.67) × 10−5−0.13 ± 0.090.7
073hib-pv-sp(4.85 ± 0.32) × 10−50.12 ± 0.1010
074hib-pv-sp(5.37 ± 0.29) × 10−5−0.21 ± 0.501.9
095hib-sp(4.94 ± 0.21) × 10−5−0.06 ± 0.271.0
117hib-pv-sp-di(3.76 ± 0.37) × 10−50.86 ± 0.276.7
119hib-pv-sp-di(5.46 ± 0.35) × 10−5−0.16 ± 0.140.4
147hib-sp-di(5.73 ± 1.20) × 10−5−0.05 ± 0.431.2
148hib-sp-di(3.34 ± 0.37) × 10−50.46 ± 0.339.4
155hib-sp(1.72 ± 0.81) × 10−51.57 ± 0.4622.3
164hib-sp-di(4.68 ± 0.39) × 10−5−0.04 ± 0.241.8
165sp-di-fo(4.32 ± 0.62) × 10−5−0.01 ± 0.040.9
212sp-pv-di(4.53 ± 0.80) × 10−5−0.11 ± 0.110.4
222hib-sp(2.44 ± 0.44) × 10−50.26 ± 0.320.2
229sp-pv-mel-di-ol(5.59 ± 0.91) × 10−5−0.15 ± 0.131.4
230hib-pv-sp-mel(4.48 ± 0.19) × 10−50.33 ± 0.313.8
230SWhib-pv-sp-mel(3.01 ± 0.79) × 10−51.77 ± 0.810.7