| Cohenite in meteorites: a proposed origin. | |
| | |
MedLine Citation:
|
PMID: 17730609 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
|
Cohenite [(Fe, Ni)(3)C] is found almost exclusively in meteorites containing from 6 to 8 percent nickel (by weight). On the basis of iron-nickel-carbon phase diagrams at 1 atmosphere and of kinetic data, the occurrence of cohenite within this narrow composition range as a low-pressure metastable phase and the nonoccurrence of cohenite in meteorites outside the range 6 to 8 percent nickel can be explained. Cohenite formed in meteorites containing less than 6 to 8 percent nickel decomposed to metal and graphite during cooling; it cannot form in meteorites containing more than about 8 percent. The presence of cohenite in meteorites cannot be used as an indicator of pressure of formation. However, the absence of cohenite in meteorites containing the assemblage, metal plus graphite, requires low pressures during cooling. |
| | |
Authors:
|
R Brett |
Related Documents
:
|
21102959 - Optical-fiber sensor for simultaneous measurement of pressure and temperature: analysis... 20484799 - Octahedral tilting in pb-based relaxor ferroelectrics at high pressure. 20235499 - Tuning intermolecular interactions in dioctyl-substituted polyfluorene via hydrostatic ... 7633279 - An optical pressure chamber designed for high numerical aperture studies on adherent li... 11310659 - Photochemical and oxidative degradation of the solid-state tretinoin tocoferil. 18529369 - Electro-active polymer transduction for distributed netted sensing. 21645899 - Large-artery stiffness: a reversible marker of cardiovascular risk in primary hyperpara... 12653189 - Self-measurement and ambulatory monitoring of blood pressure: a subject's chronobiologi... 18189999 - Ultrasound contrast agent microbubbles: stable and transient subharmonic emissions. |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: Science (New York, N.Y.) Volume: 153 ISSN: 0036-8075 ISO Abbreviation: Science Publication Date: 1966 Jul |
Date Detail:
|
Created Date: 2010-06-07 Completed Date: 2010-07-02 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 0404511 Medline TA: Science Country: United States |
Other Details:
|
Languages: eng Pagination: 60-2 Citation Subset: - |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Martian Wave of Darkening: A Frost Phenomenon?
Next Document: Copper and the Role of Isopods in Degradation of Organic Matter.