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Figure 4
The molecule of methane, CH4, with its H atoms labeled to guide the eye, can be transformed by the action of a proper twofold axis (upper panel) and by the action of the [\overline 4] rotoinversion axis (lower panel). In addition, the molecule has (not shown) four threefold axes along the C—H bonds, and six mirror planes defined by the six possible H—C—H planes (H1—C—H2, H3—C—H4, H1—C—H3, H2—C—H4 etc.).

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 43| Part 5| August 2010| Pages 1150-1171
doi:10.1107/S0021889810026956
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