Multiple twinning of diamond synthesized by acetylene flame
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Sam Ick Son
Abstract
The relation between the domains and domain boundaries of multiple twins of diamond were investigated by the electron back scatter diffraction (EBSD) method and high resolution transmission electron microscopy (HRTEM). Multiple twinned diamonds have two types of icosahedral morphologies. One is an almost perfect icosahedron in which all of the faces are {111} faces. The other is a hollow icosahedron similar to one of the Kepler-Poinsot polyhedrons. The indented negative trigonal faces are formed from the {100} faces of a cube. It was confirmed that the convex edges of the twinned icosahedron corresponded to the Σ3 boundaries, whereas the concave edges were assigned to the Σ9 twin boundary by means of the EBSD analysis.
It was confirmed from the HRTEM image that a series of dislocations compensate for the mismatching angle which occurs after five successive twinning.
© 2004 Oldenbourg Wissenschaftsverlag GmbH
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Articles in the same Issue
- Shadowing and absorption corrections of single-crystal high-pressure data
- Orthotetrahedral crystal structures My(TO4)z (T = Si, Ge, P, As, S, Se, Cl, Br, I): geometrical-topological analysis, quasi-binary representation, and comparison with the AyXz compounds by the method of coordination sequences
- Synthesis, crystal structure and thermal decomposition of potassium-doped carbonated hydroxyapatite
- Solid state miscibility in the pseudo-binary TiO2—(FeSb)O4 system at 1373 K
- Multiple twinning of diamond synthesized by acetylene flame
- Variable temperature (100–360 K) single-crystal X-ray diffraction study of the orthorhombic polymorph of paracetamol (p-hydroxyacetanilide)
- Crystal and molecular structures of two triorganophosphinegold(I) 2-amino-cyclopent-1-ene-1-carbodithioates
