description Muonionalusta Overview
Muonionalusta is an iron meteorite discovered in northern Sweden near the Muonio River and classified in the IVA chemical group. Its cut and etched surfaces commonly reveal a pronounced Widmanstatten pattern, a crystalline structure produced by extremely slow cooling within the metallic core of a differentiated asteroid. The meteorite broke into numerous fragments across a broad area and is studied by planetary scientists as well as collected for its distinctive internal structure.
help Muonionalusta FAQ
Where was the Muonionalusta meteorite discovered?
The first recognized pieces were found in 1906 in northern Sweden, near the Muonio River and the Finnish border. Additional masses have since been recovered from the same Scandinavian region.
Why do etched Muonionalusta slices have geometric lines?
Muonionalusta is a fine octahedrite, so acid etching exposes intergrown kamacite and taenite crystals known as a Widmanstätten pattern. That structure records exceptionally slow cooling in the metallic interior of its parent body.
Does Muonionalusta rust easily?
It can. The meteorite's long exposure to the damp, glaciated environment of northern Sweden often leaves cracks and terrestrial weathering, so polished jewelry and slices usually require careful sealing and dry storage.
What is Muonionalusta's meteorite classification?
It is an IVA iron meteorite and is generally described structurally as a fine octahedrite. Gibeon is another famous IVA iron, although the two meteorites were found on different continents and have different weathering histories.
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