Laboratory for Space Sciences

Images of presolar grains


TEM images of high-density graphites (Murchison KFC)

TiCs (titanium carbides) found within KE3 graphites: a) euhedral TiC with amorphous/nanocrystalline rim, b) euhedral TiC c) anhedral, disordered TiC and d) kamacite with amorphous/nanocrystalline rim

Pristine silicon carbide grains from Murchison meteorite

High density graphites from Murchison KFC:

top) fragment of dense graphite with internal TiCs

and chromite grains; bottom) intergrown graphites

Low density graphite from Murchison KFC containing internal Ti(Zr,Mo,Ru)C grains


Continue ... Newly-discovered presolar phases.



My brain is very large and has complex folds ... take me straight to

your paper on supernova graphites in Geochim. Cosmochim. Acta.


Back to the beginning.

Take a detour

How are isotopic anomalies created?

What is a transmission electron microscope (TEM)?

What is the NanoSIMS?

How does secondary ion mass spectrometry (SIMS) work?

Washington University presolar grains site

Created by: Kevin Croat