Tetartohedral twinning could happen to you too

Pietro Roversi, Eric Blanc, Steven Johnson, Susan Mary Lea

Research output: Contribution to journalArticleResearchpeer-review

11 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)418-424
Number of pages7
JournalActa Crystallographica Section D: Biological Crystallography
Issue number4
Publication statusPublished - Apr 2012
Externally publishedYes


  • tetartohedral twinning Model building, refinement and validation

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