Space group determination: Difference between revisions
m →Table of space groups by Laue class and Bravais type: add "usually" for oP |
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| 2/m || mC || 5 || - |||| The [[pointless]] article discusses why I2 (mI) should not be used. | | 2/m || mC || 5 || - |||| The [[pointless]] article discusses why I2 (mI) should not be used. | ||
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| mmm || oP || 16 || 17, 18, 19 |||| screw axis extinctions let you decide. The [[pointless]] article discusses why CCP4's 1017 (P2<sub>1</sub>22), 2017 (P22<sub>1</sub>2), 2018 (P2<sub>1</sub>22<sub>1</sub>) , 3018 (P22<sub>1</sub>2<sub>1</sub>) are not needed and should not be used. | | mmm || oP || 16 || 17, 18, 19 |||| screw axis extinctions let you decide. The [[pointless]] article discusses why CCP4's 1017 (P2<sub>1</sub>22), 2017 (P22<sub>1</sub>2), 2018 (P2<sub>1</sub>22<sub>1</sub>) , 3018 (P22<sub>1</sub>2<sub>1</sub>) are not usually needed and should not usually be used. | ||
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| mmm || oC || 21 || 20 |||| screw axis extinctions let you decide | | mmm || oC || 21 || 20 |||| screw axis extinctions let you decide | ||
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Alternative indexing possibilities taken from http://www.ccp4.ac.uk/html/reindexing.html (for R3 and R32, obverse/reverse are specified). | Alternative indexing possibilities taken from http://www.ccp4.ac.uk/html/reindexing.html (better readable at http://www.csb.yale.edu/userguides/datamanip/ccp4/ccp4i/help/modules/appendices/reindexing.html) (for R3 and R32, obverse/reverse are specified). | ||
If you find an error in the table please send an email to kay dot diederichs at uni-konstanz dot de ! | If you find an error in the table please send an email to kay dot diederichs at uni-konstanz dot de ! | ||
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[[File:Spacegroups | [[File:Spacegroups tree2a.png|800px]] | ||
(compare International Tables for Crystallography Vol A (2006), figure 10.1.3.2) | |||
== Space group selected by XDS: ambiguous with respect to enantiomorph and screw axes == | == Space group selected by XDS: ambiguous with respect to enantiomorph and screw axes == | ||