Re: [ccp4bb] Layer Groups: B2 recognized?

2012-07-02 Thread Ian Tickle
Ooops bad link: http://img.chem.ucl.ac.uk/sgp/medium/monoc.htm -- Ian On 2 July 2012 11:49, Ian Tickle wrote: > Hi James > > I would say that you are completely correct in your assessment of the > situation.  The Bilbao server clearly lists only the unique 'standard' > settings, leaving to the u

Re: [ccp4bb] Layer Groups: B2 recognized?

2012-07-02 Thread Ian Tickle
Hi James I would say that you are completely correct in your assessment of the situation. The Bilbao server clearly lists only the unique 'standard' settings, leaving to the user the task of rotating the basis to whatever is required by the unit cell convention, or other criteria such as isomorph

[ccp4bb] Layer Groups: B2 recognized?

2012-06-29 Thread James Stroud
Hello Everyone and especially symmetry experts, I found at http://img.chem.ucl.ac.uk/sgp/medium/003dy1.htm that B2 (SG #2) is a recognized space group that has a basis rotated from P2 (and as a result has two new positions). I'm wondering whether a similar B2 for P2 (LG #3) is recognized for th