Meteorite Namibia (disc)
| Chemical designation | Meteorite Namibia (disc) |
|---|---|
| Etching | 5% Nital |
The sample comes from the same iron-nickel meteorite as the fragment, the microstructure is identical (coarse Widmannstätten ferrite with austenite residues in between). The microstructure consists mainly of coarse ferrite plates in Widmannstätten arrangement, which contain approx. 7 mass-% nickel (mineral designation: kamacite). The ferrite was precipitated from austenite during the very slow cooling process. Narrow areas of austenite have remained between the ferrite plates, in which the nickel has accumulated to 20…40 mass % (mineral: taenite). This structure is typical of iron-nickel meteorites.
