Toluca is a group of iron meteorites found in Jiquipilco, Mexico near Toluca.[1]
| Toluca | |
|---|---|
 500g Toluca slice | |
| Type | Iron |
| Structural classification | Coarse Octahedrite |
| Group | IAB-sLL |
| Composition | 90.5% Fe; 8.1% Ni |
| Country | Mexico |
| Region | Toluca Valley, Jiquipilco, Mexico State |
| Coordinates | 19°27′N 99°35′W / 19.450°N 99.583°W[1] |
| Observed fall | No |
| Fall date | >10,000 years ago |
| Found date | about 1776 |
| TKW | 3 tonnes |
 Related media on Wikimedia Commons | |
History
editThe meteorites probably crashed into Earth more than 10,000 years ago.[2] For centuries, Mexican people living near the meteorites used them as a source of metal for various tools. They were first described by conquistadores in about 1776.[1]
The total known mass is about 3 tonnes.[3]
Composition and classification
editThese iron meteorites are a coarse octahedrite, chemical type IAB-sLL.[3] The mean composition is 90.5% Fe and 8.1% Ni.[1] They often contain large troilite inclusions.
See also
editReferences
edit- ^ a b c d Vagn Fabritius Buchwald (1975). "Handbook of Iron Meteorites".
- ^ Vagn Fabritius Buchwald (2005). Iron and Steel in Ancient Times. ISBN 978-87-7304-308-0.
- ^ a b Meteoritical Bulletin Database: Toluca