[meteorite-list] Tamassint (NWA 4590): Rocks from Space Picture of the Day - January 20, 2008

[bernd.pauli at paulinet.de]

http://www.rocksfromspace.org/January_20_2008.html

Beautiful thin section pictures and those subparallel streaks are
probably exsolution* lamellae of kirschsteinite [CaFe(SiO4)].

* H. McSween (1999) Meteorites and Their
Parent Planets, Second Edition, Glossary, p. 290:

Exsolution = rearrangement of atoms in a homogeneous crystal
on cooling so that an intergrowth of two separate minerals results

Bernd

(happy owner of a 1.024-gram individual of NWA 4590)