space group
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See also: spacegroup
English
Noun
space group (plural space groups)
- (crystallography, mineralogy) The set of all symmetry operations that can be applied to a given crystal without changing it.
- 1998, Georgina Ferry, Dorothy Hodgkin: A Life:
- Dorothy also learned to identify the space group of a molecule, an essential prerequisite for finding the structure, by looking for spots that were missing from the regular array in an X-ray photograph.