Dear Acoot, Crystallographers came to realize this very early on that the crystal exterior was not crucial; diffraction really is a property of the crystal interior.
I believe the first mention I found of this was in what's certainly one of the most beautiful scientific pieces I've ever read--and I highly recommend it: William Bragg (1914). X-rays and crystalline structure. Science 40, 795-802. (Some days I wish all high schoolers could read this paper the world over, especially also in poor countries, where access to quality reading material is still sadly so poor.--Well, then again, who knows, perhaps in an international year of crystallography!) Best regards, Navdeep --- On Tue, Dec 24, 2013 at 08:49:20PM -0800, Acoot Brett wrote: > Dear All, > > I am optimizing a crystal. In one of the optimizing conditions I find the > crystal is cubic-like shape (the crystal is not large, but absolutely not the > traditional "tiny crystal". The crystal has some kind of faces and edges but > not so sharp, and it is absolutely not round). But after 1 day the crystal > changed into sphere form (the "cubic" not obvious). > > Will you please introduce your experience on how to get the sharp face and > sharp edge crystal for my situation)? > > There is source says if the crystal grows too faster, the sharpness would be > lost. Will you please also let me know how to slow down the growth rate of > the crystal? > > Cheers, > > Acoot --- Navdeep Sidhu Departments of Structural Chemistry & Pediatrics II University of Goettingen ---
