Cathodoluminescence microcharacterization of ballen silica in impactites

Journal Article · Mon Aug 17 04:00:00 EDT 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3222881· OSTI ID:21344500

Okumura, T; Ninagawa, K; Toyoda, S ^[1]; Gucsik, A ^[2]; Nishido, H ^[3]

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1. Department of Applied Physics, Okayama University of Science, 1-1 Ridai-cho, Kita-ku, Okayama 700-0005 (Japan)
2. Max Planck Institute for Chemistry, P. O. Box 3060, D-55020 Mainz (Germany)
3. Research Institute of Natural Sciences, Okayama University of Science, 1-1 Ridai-cho, Kita-ku, Okayama 700-0005 (Japan)

The ballen silica shows fairly weak (faint) CL with homogeneous feature in its grain exhibiting almost same spectral pattern with two broad band peaks at around 390 and 650 nm, which might be assigned to self-trapped excitons (STE) or an intrinsic and nonbridging oxygen hole centers (NBOHC), respectively, recognized in amorphous and crystalline silica. In addition, ballen silica from Lappajaervi crater shows bright and heterogeneous CL with a broad band centered at around 410 nm, presumably attributed to [AlO{sub 4}/M{sup +}]{sup 0} centers or self-trapped excitons (STE). Micro-Raman and micro-XRD analyses show that fairly homogeneous CL part is alpha-quartz and heterogeneous CL part is composed of alpha-cristobalite and alpha-quartz. These indicate that ballen silica could be formed in the quenching process from relatively high temperature.

• OSTI ID: 21344500
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1163; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AMORPHOUS STATE
CATHODOLUMINESCENCE
COHERENT SCATTERING
CRISTOBALITE
DIFFRACTION
ELECTRON MICROSCOPY
EMISSION
EMISSION SPECTRA
EXCITONS
HOLES
LASER SPECTROSCOPY
LUMINESCENCE
MICROSCOPY
MINERALS
OPTICAL MICROSCOPY
OXIDE MINERALS
PHOTON EMISSION
QUARTZ
QUASI PARTICLES
QUENCHING
RAMAN SPECTROSCOPY
SCANNING ELECTRON MICROSCOPY
SCATTERING
SILICATE MINERALS
SPECTRA
SPECTROSCOPY
TEMPERATURE DEPENDENCE
TRAPPING
X-RAY DIFFRACTION