Tishomingo, Ungrouped Iron

The Tishomingo meteorite is a Ni-rich ataxite that displays a unique, almost microscopic structure.  When found, it consisted of a massive 260 kilogram meteorite broken into four pieces.  I can’t add much to Buchwald’s thorough description of the meteorite.  It was classified as ungrouped due to its unique structure, despite compositional similarities to the IVBs.

A small excerpt from the above Buchwald entry:

Here’s a 45 gram slab.  Many thanks to Marlin Cilz for this specimen.  I’ve spent hours on the microscope looking at it.  Grid is 5mm.