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Low-Temperature Chemical Synthesis and Microstructure Analysis of GeO 2 Crystals with α-Quartz Structure

✍ Scribed by Atuchin, Victor V.; Gavrilova, Tatiana A.; Gromilov, Sergey A.; Kostrovsky, Vitalii G.; Pokrovsky, Lev D.; Troitskaia, Irina B.; Vemuri, R. S.; Carbajal-Franco, G.; Ramana, C.V.


Book ID
121465636
Publisher
American Chemical Society
Year
2009
Tongue
English
Weight
215 KB
Volume
9
Category
Article
ISSN
1528-7483

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✍ Lager, G. A.; Jorgensen, J. D.; Rotella, F. J. 📂 Article 📅 1982 🏛 American Institute of Physics 🌐 English ⚖ 584 KB

The crystal structure of α-SiO2 (low quartz) has been refined at 296, 78, and 13 K from time-of-flight neutron powder diffraction data. The major effect of temperature from 296 to 78 K is a nearly rigid body rotation of the SiO4 tetrahedra. Below 78 K, tetrahedral rotation is substantially reduced g