Optical silica glass based on super quartzites from the Eastern Sayan Mountains

Nepomnyashchikh, A. I.; Demina, T. V.; Zhaboedov, A. P.; Eliseyev, I. A.; Lesnikov, P. A.; Lesnikov, A. K.; Paklin, A. S.; Romanov, V. V.; Сапожников, А. Н.; Sokol’nikova, Yu. V.; Федоров, А. В.; Shalaev, A. A.; Shendrik, R. Yu.

doi:10.1134/s1087659617030099

Cited by 12 publications

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“…It can be inferred from the observation that in the distribution of the size of the rings the frequency of rings of size 6 increases with decreasing cooling rate, which shows that the local structure of the glass approaches that of β-cristobalite [40]. X-ray diffraction studies demonstrated that cristobalite formation begins at 1150 • C in experimental glasses produced from quartzite [41].…”

Section: Results and Discussion -mentioning

confidence: 99%

EPR study of the E’ defects in optical glasses and cristobalite

Mashkovtsev¹,

Nepomnyashchikh²,

Zhaboedov³

et al. 2021

EPL

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The electron paramagnetic resonance (EPR) in experimentaloptical glasses obtained from the East Sayan mountain quartzites has beenstudied. For comparison a powder sample of cristobalite that formed duringthe beneficiation process of quartzite was also investigated by EPR. Thecomplex EPR spectra of fast-electron-irradiated glass andcristobalite were treated by computer simulations to determine the types of centers and their principal gvalues. In glasses the well-known paramagnetic centers , , have been observed. In particular, thecenter previously characterized as stableonly below was observed as a stable variantat room temperature. In cristobalite the paramagnetic defects similar to the , , centers with slightly differentg values have been observed. From the observation of analogous centers it was inferred that local structuresof glass and -cristobalite aresimilar.

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Section: Results and Discussion -mentioning

confidence: 99%