Source:http://linkedlifedata.com/resource/pubmed/id/12443487
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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:dateCreated |
2002-11-21
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| pubmed:abstractText |
We present a new method to separate the crystallographic and electronic phase transitions in hematite using x-ray emission spectroscopy and x-ray diffraction. Our observations, based on the behavior of a metastable high-pressure phase in the stability domain of the low-pressure phase, show that the electronic transition is preempted by the crystallographic transition. The former occurs only afterwards in the high-pressure phase, possibly as a result of a Mott transition. The idea that the electronic transition drives the transition in hematite is therefore invalidated. Such methods should help elucidate the mechanics and the driving forces behind a number of first-order high-pressure phase transitions.
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| pubmed:language |
eng
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| pubmed:status |
PubMed-not-MEDLINE
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| pubmed:author | |
| pubmed:owner |
NLM
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| pubmed:authorsComplete |
Y
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| pubmed:pagination |
205504
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| pubmed:dateRevised |
2003-11-4
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| pubmed:articleTitle |
Nature of the high-pressure transition in Fe2O3 hematite.
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| pubmed:affiliation |
Laboratoire de Minéralogie-Cristallographie de Paris (UMR 7590), CNRS Case 115, 4 Place Jussieu, 75252 Paris CEDEX 05, France.
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