The meaning of ALPHA QUARTZ is quartz with trigonal-trapezohedral symmetry : the stable form of quartz below about 573° C.
quartz, alphadoi:10.1007/978-3-540-72816-0_17812same as low quartz , alpha quartz .low quartzlow quartzlow quartzalpha quartzalpha quartzalpha quartzSpringer Berlin Heidelberg
Crystallography of alpha-quartz is discussed with special reference to the existing ambiguities regarding handedness of its enantiomorphic forms and a mnemonic has been suggested. Previous x-ray diffraction topographic studies of synthetic quartz are critically reviewed and analysed to understand the ...
Alpha quartzM.M.J. TreacyJ.B. HigginsCollection of Simulated XRD Powder Patterns for Zeolites (Fifth Edition)
alpha quartz 美 英 un.α石英 网络石英相 英汉 网络释义 un. 1. α石英
This chapter presents the numerical data and the simulated powder patterns of Alpha Quartz material with 39.49° as 2θ value. Two compositions, which are expressed in terms of the full unit cell content, are provided. The chemical composition is the nominal material composition provided in the ...
The present invention relates to a process for preparing quartz-alpha layers epitaxially grown on a silicon substrate, to the material obtained according to this method, and to its various applications, particularly in the field of electronics.CEDRIC BOISSIERE...
This chapter presents the numerical data and the simulated powder patterns of Alpha Quartz material with 39.49° as 2θ value. Two compositions, which are expressed in terms of the full unit cell content, are provided. The chemical composition is the nominal material composition provided in the ...
Under near-equilibrium compression conditions at room temperature, alpha-quartz transits to a new P2/c silica phase via a structural intermediate. If the thermally activated transition is kinetically suppressed, the ultimate stability of alpha-quartz is controlled by its phonon instability and alpha-...
The effects of neutrally charged silicon vacancies on the atomic structure and the lattice dynamics of 伪-quartz were studied. This theoretical study focuses on modeling of the equilibrium local structure and the symmetrized local density of vibrational states. The frequencies of localized vibrations ...