Twinning in meteoritic and synthetic perovskite

L. P. Keller, P R Buseck

Research output: Contribution to journalArticle

19 Citations (Scopus)

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 languageEnglish (US)
Pages (from-to)73-79
Number of pages7
JournalAmerican Mineralogist
Volume79
Issue number1-2
StatePublished - 1994

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twinning
Twinning
perovskite
Meteorites
meteorites
meteorite
carbonaceous chondrites
carbonaceous chondrite
phase transition
Electron microscopes
electron microscopes
Phase transitions
electron
temperature
Temperature

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

Cite this

Twinning in meteoritic and synthetic perovskite. / Keller, L. P.; Buseck, P R.

In: American Mineralogist, Vol. 79, No. 1-2, 1994, p. 73-79.

Research output: Contribution to journalArticle

Keller, L. P. ; Buseck, P R. / Twinning in meteoritic and synthetic perovskite. In: American Mineralogist. 1994 ; Vol. 79, No. 1-2. pp. 73-79.
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