N.C.S.R. "Demokritos"

Research

Department of Materials Science

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X-ray Crystallography on Twinned Crystals

Based on the approach described by (R. Sparks) it is possible to solve and refine crystal structures with data collected with 4-circle diffractometers and from crystals which are Non-Merohedral Twins. In this case the reciprocal lattices of the different twin domains do not superimpose exactly. The twinning can be detected from the reflection pattern (broad reflections, split reflections etc.) at the early stages of analysis (indexing). The first (and main) problem is to index the recorded reflections, because they belong to two or more lattices from two or more crystals of the same compound and the second is to find the Twin Law.

Department of Materials Science, N.C.S.R. "Demokritos", 153 10 Aghia Paraskevi, Attiki, phone: +30 210 6503381, fax: +30 210 6519430
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