Tetartohedral crystal twinning is discussed as a particular case of (pseudo)merohedral twinning when the number of twinned domains is four. Tetartohedrally twinned crystals often possess pseudosymmetry, with the rotational part of the pseudo-symmetry operators coinciding with the twinning operators. Tetartohedrally twinned structures from the literature are reviewed and the recent structure determination of tetartohedrally twinned triclinic crystals of human complement factor I is discussed.
|Number of pages||7|
|Journal||Acta Crystallographica Section D: Biological Crystallography|
|Publication status||Published - Apr 2012|
- tetartohedral twinning Model building, refinement and validation