2006 | OriginalPaper | Buchkapitel
Classification of Crystals, Point Groups, and Space Groups
Erschienen in: Structure and Chemistry of Crystalline Solids
Verlag: Springer New York
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From the study of angles between faces and cleavage planes of crystals T. Bergman and R. Haüy concluded, independently, around 1780, that all crystals consist of a masonry-type arrangement of equal parallelepipedal building bricks. Later it was recognized that there are seven crystallographic unit cells of crystals.