Reply-To: | | [log in to unmask][log in to unmask] > [mailto:[log in to unmask]] On Behalf Of Ethan A Merritt > Sent: 12 June 2008 15:46 > To: Multiple recipients > Cc: [log in to unmask] > Subject: Re: [ccp4bb] birefringent spacegroups > > On Wednesday 11 June 2008 23:55, Robin Owen wrote: > > Hi Jacob, > > > > The birefringence of a crystal is determined by a three dimensional > > shape (the indicatrix) describing how refractive index varies with > > direction within the crystal. You can think of this as a [...]53_12Jun200817:50:[log in to unmask] |