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Figure 8
(Upper) The {010} form of gypsum (G) where the [100], [001] and [101] directions are represented; the angle is 114.08°. (Lower) The same gypsum {010} form, but brushite platelets (Br) have been superposed: direction [101]G is parallel to [101]Br. Owing to the brushite space group (Aa), [101]Br is not symmetry equivalent to the [101]Br direction.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 58| Part 4| August 2025| Pages 1220-1226
https://doi.org/10.1107/S1600576725005060
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