-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi Frank,
I would not call it 'axiomatic' but 'statistics' to reduce the (stochastic) error by several independent measurements. You can probably give any statistics textbook as a reference. In real life, though, you have to compromise with radiation damage, though. For references I recommend searching journals.iucr.org for 'Garman' as author. If you add 'radiation damaga' as keywords, the result reduces to 37 hits of choice. Best, Tim On 05/14/2013 06:50 AM, Frank von Delft wrote: > Hi, I'm meant to know this but I'm blanking, so I'll crowdsource > instead: > > Anybody know a (the) reference where it was showed that the best > SAD data is obtained by collecting multiple revolutions at > different crystal offsets (kappa settings)? It's axiomatic now (I > hope!), but I remember seeing someone actually show this. I > thought Sheldrick early tweens, but PubMed is not being useful. > > (Oh dear, this will unleash references from the 60s, won't it.) > > phx > - -- - -- Dr Tim Gruene Institut fuer anorganische Chemie Tammannstr. 4 D-37077 Goettingen GPG Key ID = A46BEE1A -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iD8DBQFRkfN7UxlJ7aRr7hoRAnlWAJ9T4MvGHUGA+HRwOL2i/6rU7KW1xwCcDsAq KAvPG9FqtNYO2kLqmh7wIZI= =MNNU -----END PGP SIGNATURE-----
