NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Occurrence and possible significance of rare Ti oxides (Magneli phases) in carbonaceous chondrite matricesRare, ultrafine-grained Ti oxides (Ti3O5 and the Magneli phases, Ti5O9 and Ti8O15) have been identified by TEM in the CM2 carbonaceous chondrite, Bells, and a carbonaceous chondrite matrix clast from the Nilpena polymict ureilite. In both meteorites the Ti oxides occur in the matrix as isolated grains and clusters of two or more grains. They are euhedral in shape and have grain sizes of 0.05-0.3 micron. Magneli phases have been recently shown to be a common component in some interplanetary dust particles, but this is the first reported occurrence in a meteorite. The morphological properties and grain size of the Ti oxides are consistent with formation by vapor phase condensation either within the solar nebula or possibly in a presolar environment.
Document ID
19940035791
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Brearley, Adrian J.
(New Mexico Univ. Albuquerque, United States)
Date Acquired
August 16, 2013
Publication Date
September 1, 1993
Publication Information
Publication: Meteoritics
Volume: 28
Issue: 4
ISSN: 0026-1114
Subject Category
Lunar And Planetary Exploration
Accession Number
94A12446
Funding Number(s)
CONTRACT_GRANT: NAG9-497
CONTRACT_GRANT: NAG9-30
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available