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Titolo:
ESR study of a new electron center in synthetic stishovite, a high-pressure polymorph of silica
Autore:
Tani, A; Yamanaka, C; Ikeya, M; Ohtaka, O; Katsura, T;
Indirizzi:
Osaka Univ, Dept Earth & Space Sci, Osaka, Japan Osaka Univ Osaka JapanOsaka Univ, Dept Earth & Space Sci, Osaka, Japan Okayama Univ, Inst Study Earths Interior, Tottori 68201, Japan Okayama Univ Tottori Japan 68201 y Earths Interior, Tottori 68201, Japan
Titolo Testata:
APPLIED MAGNETIC RESONANCE
fascicolo: 4, volume: 18, anno: 2000,
pagine: 559 - 564
SICI:
0937-9347(2000)18:4<559:ESOANE>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
RADIATION-INDUCED DEFECTS; CRYSTALLINE QUARTZ; ALPHA-QUARTZ; PHASE SIO2; THERMOLUMINESCENCE; SPECTROSCOPY; RESONANCE; SO2; EPR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
16
Recensione:
Indirizzi per estratti:
Indirizzo: Tani, A Univ Tokyo, Ocean Res Inst, Nakano Ku, 1-15-1 Minamidai, Tokyo 1648639, Japan Univ Tokyo 1-15-1 Minamidai Tokyo Japan 1648639 yo 1648639, Japan
Citazione:
A. Tani et al., "ESR study of a new electron center in synthetic stishovite, a high-pressure polymorph of silica", APPL MAGN R, 18(4), 2000, pp. 559-564

Abstract

A new unidentified electron center in gamma-ray-irradiated synthetic stishovite, a high-pressure polymorph of SiO2, was detected by X-band electron spin resonance. It has an anisotropic g-factor of orthorhombic symmetry, g(1) = 1.9764, g(2) = 1.9527 and g(3) = 1.9370. The signal intensity was saturated at a microwave power of 2 mW. Annealing experiments show that the center was annealed out around 280 K and unstable at room temperature. The center may be ascribed to a titanium electron center on the basis of a relatively large g-shift and a comparison with the paramagnetic centers in quartz.

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Documento generato il 04/04/20 alle ore 02:53:42