NWA 18087 (0.26 gram)

Classification: Achondrite, Angrite W-moderae / S-low
Place/Time: 2025 in Mali
Mass: 277g

History: The meteorite was purchased from a dealer in Mali.
Physical characteristics: Grayish rock with some fusion crust.
Petrography: The meteorite shows a fine-grained subophitic texture predominantly composed of up to 300 µm sized often lath-shaped anorthite, Al-Ti-augite, and Ca-rich olivine grains. Pyroxene and olivine display strong compositional zoning and many olivine grains are overgrown by kirschsteinite. Minor phases include titanomagnetite, ilmenite, and troilite. Contains abundant vesicles most of which partly filled with secondary calcite.
Geochemistry: olivine: Fa_48.5±13.7Ln_3.3±3.2 (Fa_37.6-75.3Ln_1.4-10.8, FeO/MnO=71-99, CaO: 2.0±1.8, n=7); kirschsteinite: Fa_57.7±1.4Ln_37.2±0.8 (Fa_55.4-59.0Ln_36.3-38.5, FeO/MnO=66-76, CaO: 21.7±0.6, n=7); Al-Ti-diopside: Fs_34.1±10.2Wo_52.6±0.6 (Fs_23.3-46.5Wo_51.3-53.2, FeO/MnO=82-164, Al₂O₃: 6.8±0.4 wt.%, TiO₂: 2.0±0.7 wt.%, n=7); anorthite: An_99.5-99.9Ab_0.1-0.5, n=7

NOTE:  slices about 1.4mm thick