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| Components | Model 1 | Model 2 | Model 3 | Model 4 | Model 5 | Model 6 | Reference |
| Amorphous H2O | 13% (500) | 5% (600) | 7% (400) | 9% (370) | 5% (300) | 1% (200) | Grundy & Schmitt (1998) |
| Crystalline H2O | 13% (40) | 3% (100) | 13% (160) | 12% (150) | 3% (50) | 19% (200) | Grundy & Schmitt (1998) |
| Pure NH3 | - | - | 2% (120) | - | - | - | Schmitt et al. (1998) |
| NH3:H2O (1:99) | - | 13% (150) | - | - | 11% (300) | - | T. Roush (Priv. comm) |
| Pure CH4 | - | 6% (800) | 5% (800) | 5% (800) | - | - | Quirico & Schmitt (1997) |
| Amorphous C | 71% (10) | 71% (10) | 71% (10) | 71% (10) | 71% (10) | 58% (10) | Zubko et al. (1996) |
| Titan tholin | 3% (10) | 2% (10) | 2% (10) | 3% (10) | 0% (10) | 1% (10) | Khare et al. (1984) |
| C2H6 | - | - | - | 0% (20) | - | 7% (600) | Quirico & Schmitt (1997) |
| NH4+ | - | - | - | - | 9% (800) | 13% (800) | J. Cook (Priv. comm.) |
Reduced 
|
1.78 | 1.29 | 1.32 | 1.35 | 1.64 | 1.23 |
Notes. Grain size in micron is indicated in parenthesis. Models are sorted on Fig. 4 from bottom (model 1) to top (model 6).
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