CAI formation in the early Solar System | Astronomy & Astrophysics (A&A)

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Volume 687 (July 2024)

A&A, 687 (2024) A65

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Table 2

Material composition of the solid particles found in the midplane of our disc model after 0.1 Myr, depending on radius.

Name	T [K]	r ([au])	κ_r [cm² g⁻¹]	Volume composition [%]
Al-Ca-Ti	1570	0.23	0.057	Ca₂Al₂SiO₇ [62.0], Al₂O₃ [33.8], CaTiO₃ [4.2], ZrO₂ [0.01]
Silicates	1070	0.64	0.70	MgSiO₃ [37.2], Mg₂SiO₄ [32.5], Fe [15.4], CaAl₂Si₂O₈ [9.7], CaMgSi₂O₆ [3.1], MgCr₂O₄ [1.0], Ni [0.7], CaTiSiO₅ [0.3]
Silicates + FeS	490	1.4	0.59	Mg₂SiO₄ [38.4], MgSiO₃ [16.7], FeS [14.5], NaAlSi₃O₈ [10.6], Fe [8.0], CaMgSi₂O₆ [6.7], MgAl₂O₄ [1.0], MgCr₂O₄ [0.9], Ni [0.7], KAlSi₃O₈ [0.7], Mn₃Al₂Si₃O₁₂ [0.6], Ca₅P₃O₁₃H [0.5], Ca₅P₃O₁₂F [0.4], CaTiSiO₅ [0.3]
Phyllosilicates	195	3.1	0.55	Mg₃Si₂O₉H₄ [58.2], Fe₃O₄ [10.9], FeS [9.9], NaMg₃AlSi₃O₁₂H₂ [8.6], Fe₃Si₂O₉H₄ [5.3], Ca₃Al₂Si₃O₁₂ [3.1], Ni₃S₂ [1.0], KFe₃AlSi₃O₁₂H₂ [0.7], Cr₂O₃ [0.5], Mn₃Al₂Si₃O₁₂ [0.5], NaCl [0.4], Ca₅P₃O₁₃H [0.4], Ca₅P₃O₁₂F [0.3], CaTiSiO₅ [0.2]
Water-ice	119	4.9	1.00	H₂O [73.7], Mg₃Si₂O₉H₄ [15.2], Fe₃O₄ [2.6], FeS [2.6], Mg₃AlSi₃O₁₂H₂ [2.2], Fe₃Si₂O₉H₄ [1.4], Ca₃Fe₂Si₃O₁₂ [0.9], Ni₃S₂ [0.3], AlO₂H [0.2], KFe₃AlSi₃O₁₂H₂ [0.2], MnAl₂SiO₇H₂ [0.2], Cr₂O₃ [0.1], NaCl [0.1]
Water + NH₃	60	7.9	0.92	H₂O [63.4], Mg₃Si₂O₉H₄ [14.7], NH₃ [13.5], Fe₃O₄ [2.2], FeS [2.2], Fe₃Si₂O₉H₄ [1.7], Ca₃Al₂Si₃O₁₂ [0.7], Na₂SiO₃ [0.4], AlO₂H [0.3], Ni₃S₂ [0.3], KFe₃AlSi₃O₁₂H₂ [0.2], Cr₂O₃ [0.1]

Notes. The radial positions of these materials shift during disc evolution, but their relative volume compositions as function of temperature remain rather similar; compare Figs. 2 and 3. Materials with volume fractions < 0.1% are omitted, except for ZrO₂ in the first row.

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