Table 3
Compilation of properties for a few selected dust species.
| Grain material | Condensation | Abundance (b) | Cross-section (c) | Wind-driver | |
| distance (a) | SPL | BG | |||
|
|
|||||
| Fe | NO | YES | YES | − | NO |
| Al2O3 | YES | NO | NO | − | NO |
| TiO2 | YES | NO | NO | − | NO |
| SiO2 | ? | YES | NO | ? | ? |
| MgSiO3 | YES | YES | NO | ? | ? |
| Mg2SiO4 | YES | YES | NO | YES | YES |
| MgFeSiO4 | NO | YES | YES | − | NO |
|
|
|||||
| amC | YES | YES | YES | YES | YES |
Notes. A compilation of the criteria mentioned in Sect. 2.3 for the dust species listed in Table 1. The question mark in condensation distance and cross-section for SiO2 and Al2O3 is due to uncertainties in the optical data. Note that amC is a wind-driver in C-type AGB stars whereas all other dust species are considered in the context of M-type AGB stars. For figures showing dust opacities beyond the small particle limit, see Höfner (2008) and Mattsson & Höfner (2011) for Mg2SiO4 and amC, respectively.
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