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If you were lazy you'd just run phaser ;-) -- Tim Gruene Institut fuer anorganische Chemie Tammannstr. 4 D-37077 Goettingen GPG Key ID = A46BEE1A On Fri, 17 Apr 2009, James Stroud wrote: > Update: > > The pounding I am beginning to feel in my head is reminiscent of a pounding I > felt while working in p43212 a while ago. I think this is an alternate origin > issue. Now I just need to figure out how to redefine the origin. > > James > > > On Apr 16, 2009, at 9:38 PM, James Stroud wrote: > >> Hello All, >> >> I have two crystals (that I'll call "data set 1" and "data set 2") that >> seem to be isomorphic, but y and z are transposed between the two data >> sets. Reindexing data set 2 with the operators >> >> h => -h >> k => l >> l => k >> >> makes the axes match data set 1, but running MR with the previous data set >> 2 solution on the newly reindexed data set 2 yields a solution rotated 180 >> about z with respect to the data set 1 solution. What is the operation to >> reindex such that real space is rotated 180 about z? These are in P212121. >> >> James