Abstract
Transmission electron microscope observations of end-member perovskite from two carbonaceous chondrite meteorites show that fine-scale twinning is common. Three twin laws are observed: 1) a 90° rotation around [101], 2) a 180° rotation around [101], and 3) a 180° rotation around [121]. The results indciate that meteoritic perovskite displaying (121) twins was heated to temperatures above the cubic-orthorhombic phase transition (~1573 K) and rapidly cooled. This constraint strongly limits the mechanism responsible for the formation of perovskite in these meteorites. -from Authors
| Original language | English (US) |
|---|---|
| Pages (from-to) | 73-79 |
| Number of pages | 7 |
| Journal | American Mineralogist |
| Volume | 79 |
| Issue number | 1-2 |
| State | Published - Jan 1 1994 |
ASJC Scopus subject areas
- Geophysics
- Geochemistry and Petrology