Structural defects and polytypism in moissanite and synthetic SiC crystals

Tempesta, Gioacchino; Agrosì, Giovanna; Capitani, G.; Fregola, Rosa Anna; Scandale, Eugenio

doi:10.1107/s0108767306098710

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Abstract: Silicon Carbide Structure Polytypism1

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2006

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“…This contribution is part of a more comprehensive research project that includes the characterization of structural defects in SiC polytypes and their relations with the growth conditions [1], [2]. The structure of a 6H-SiC moissanite, previously described by ref.…”

Section: Abstract: Silicon Carbide Structure Polytypismmentioning

confidence: 99%

Refinement of the crystal structure of a terrestrial 6H-SiC

Capitani¹,

Tempesta²,

Pierro³

et al. 2006

Acta Cryst Sect A

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In course of a detailed analysis of various intermetallic compounds derived from the AlB 2 type structure, highresolution X-ray diffraction on single crystals proved very powerful in deriving precise composition of individual phases. E.g., the homogeneity ranges of EuGa 2 and SrGa 2 were determined and associated structure distortions induced by changes in composition were analyzed. The structural models derived are also discussed on the basis of solid state NMR data and in comparison to quantum chemical calculations.

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Section: Abstract: Silicon Carbide Structure Polytypismmentioning

confidence: 99%