[nirvan]

hi Friends
Can you do me a favor and explain me what is single crystal exactly and how I can prepare one for my desired substances and is there any useful book or paper which help me to understand X-ray analysis results?
thanks for your help

[fledarmus]

http://en.wikipedia.org/wiki/X-ray_crystallography is a good starting point.

Are you asking how to grow crystals suitable for analysis, or how to obtain an analysis for your crystal? As for how to understand the results, the easiest way is to get the results in a file you can visualize in any of a number of 3D structure modeling programs, giving you a nice 3D picture of your molecule.

[discodermolide]

hi Friends
Can you do me a favor and explain me what is single crystal exactly and how I can prepare one for my desired substances and is there any useful book or paper which help me to understand X-ray analysis results?
thanks for your help

Obtaining single crystals for x-ray can be very difficult. They need to be a certain size, have no inclusions, not grown together etc, etc, etc.
So you need to define your crystallization procedure very well, then carry out a slowish crystallization. With experience you can tell if a crystal will be suitable. But when you get the results they are spectacular.