High-pressure transformation of Al2O3

X-ray diffraction measurements indicate that ruby ([Cr.sup.3+] doped [Alpha]-[Al.sub.2O.sub.3]) transforms to the [Rh.sub.2O.sub.3] (II) Structure when heated to temperatures exceeding ~1000 kelvin at pressures above ~100 gigapascals, in agreement with predictions from ab initio quantum mechanical c...

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Veröffentlicht in:	Science (American Association for the Advancement of Science) 1997-11, Vol.278 (5340), p.1109-1111
Hauptverfasser:	FUNAMORI, N, JEANLOZ, R
Format:	Artikel
Sprache:	eng
Schlagworte:	Corundum Crystalline rocks Earth sciences Earth, ocean, space Exact sciences and technology Experimental petrology Geology Grade Point Average Heat High pressure effects Materials at high pressures Mineralogy Non silicates Precious stones X-rays
Online-Zugang:	Volltext
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