Ataxite

Ataxite
 Structural class 
The Chinga meteorite is an ataxite.
GroupIVB or "Iron, ungrouped", occasionally IAB or others
CompositionMainly Meteoric iron, nickel (>18%), no Widmanstätten patterns
A phase diagram showing the link between structural and chemical classification.

Ataxites (from Greek meaning "without structure") are a structural class of iron meteorites with a high nickel content and show no Widmanstätten patterns upon etching.