title: A proposal for a transition mechanism from the diamond to the lonsdaleite type.
abstract: A phase transition between the diamond (Fd3;m) and the lonsdaleite types (P6(3)/mmc) may be described as a deformation of a homogeneous sphere packing with three contacts per sphere (type 3/10/o1) in the common subgroup Pnna of Fd3;m and P6(3)/mmc. The frequently observed transition between the zinc-blende (F4;3m) and the wurtzite types (P6(3)mc) may be described in an analogous way as a deformation of a heterogeneous sphere packing in the subgroup Pna2(1). The proposed model guarantees the three-dimensional connection during the whole transformation process. By this property it is distinguished from other models.
authors: Institut für Angewandte Geowissenschaften, Allgemeine und Angewandte Mineralogie, Technische Universität BH1, Ernst-Reuter-Platz 1, D-10587 Berlin, Germany.
authors: H
authors: H
authors: Sowa
authors: E
authors: E
authors: Koch