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Figure 1
Ancient and modern aids to understanding and teaching the geometry of four-circle single-crystal diffractometers. On the left, a simple card and paper-fastener model from 1978 (photograph: G. J. McIntyre), and on the right, a modern automated model, considerably more sophisticated, yet still constructed from everyday materials [reproduced from Giorgi & Berchadsky (2022BB1)].

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 55| Part 2| April 2022| Pages 215-217
https://doi.org/10.1107/S1600576722003661
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