Titanium carbide and titania phases on Antarctic ice particles of probable extraterrrestrial origin
Two unique titania-rich particles, found within ancient Antarctic ice have been discovered and characterized, and are believed to be of extraterrestrial origin. Both particles contain abundant submicron-sized crystals of Magneli phases (Ti(n)O(2n-1). In addition, one particle contains a core of TiC....
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ftnasantrs:oai:casi.ntrs.nasa.gov:19890049159 2023-05-15T14:04:33+02:00 Titanium carbide and titania phases on Antarctic ice particles of probable extraterrrestrial origin Zolensky, M. E. Pun, A. Thomas, K. L. Unclassified, Unlimited, Publicly available JAN 1, 1989 http://ntrs.nasa.gov/search.jsp?R=19890049159 unknown http://ntrs.nasa.gov/search.jsp?R=19890049159 Accession ID: 89A36530 Copyright Other Sources 90 Lunar and Planetary Science Conference; Mar. 14-18, 1988; Houston, TX; United States 1989 ftnasantrs 2012-02-15T18:02:46Z Two unique titania-rich particles, found within ancient Antarctic ice have been discovered and characterized, and are believed to be of extraterrestrial origin. Both particles contain abundant submicron-sized crystals of Magneli phases (Ti(n)O(2n-1). In addition, one particle contains a core of TiC. Whereas the Magneli phases would have been stable in the early solar nebula, and so probably formed there, the TiC is more likely to have condensed in the cool, dusty, carbon-rich outer shell of a red giant star. It is suggested that both particles are interplanetary dust particles whose Magneli phases carry a record of the PO2-T conditions of the early solar nebula. It is further suggested that the TiC grain in particle 705 is remnant interstellar dust. Other/Unknown Material Antarc* Antarctic NASA Technical Reports Server (NTRS) Antarctic |
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NASA Technical Reports Server (NTRS) |
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90 Zolensky, M. E. Pun, A. Thomas, K. L. Titanium carbide and titania phases on Antarctic ice particles of probable extraterrrestrial origin |
topic_facet |
90 |
description |
Two unique titania-rich particles, found within ancient Antarctic ice have been discovered and characterized, and are believed to be of extraterrestrial origin. Both particles contain abundant submicron-sized crystals of Magneli phases (Ti(n)O(2n-1). In addition, one particle contains a core of TiC. Whereas the Magneli phases would have been stable in the early solar nebula, and so probably formed there, the TiC is more likely to have condensed in the cool, dusty, carbon-rich outer shell of a red giant star. It is suggested that both particles are interplanetary dust particles whose Magneli phases carry a record of the PO2-T conditions of the early solar nebula. It is further suggested that the TiC grain in particle 705 is remnant interstellar dust. |
format |
Other/Unknown Material |
author |
Zolensky, M. E. Pun, A. Thomas, K. L. |
author_facet |
Zolensky, M. E. Pun, A. Thomas, K. L. |
author_sort |
Zolensky, M. E. |
title |
Titanium carbide and titania phases on Antarctic ice particles of probable extraterrrestrial origin |
title_short |
Titanium carbide and titania phases on Antarctic ice particles of probable extraterrrestrial origin |
title_full |
Titanium carbide and titania phases on Antarctic ice particles of probable extraterrrestrial origin |
title_fullStr |
Titanium carbide and titania phases on Antarctic ice particles of probable extraterrrestrial origin |
title_full_unstemmed |
Titanium carbide and titania phases on Antarctic ice particles of probable extraterrrestrial origin |
title_sort |
titanium carbide and titania phases on antarctic ice particles of probable extraterrrestrial origin |
publishDate |
1989 |
url |
http://ntrs.nasa.gov/search.jsp?R=19890049159 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19890049159 Accession ID: 89A36530 |
op_rights |
Copyright |
_version_ |
1766275723956322304 |