Chemical Forums
1 Hour
1 Day
1 Week
1 Month
Forever
December 24, 2024, 09:08:57 AM
Forum Rules
: Read This Before Posting
Home
Help
Search
Login
Register
Chemical Forums
Chemistry Forums for Students
Inorganic Chemistry Forum
crystallography q's
« previous
next »
Print
Pages: [
1
]
Go Down
Topic: crystallography q's (Read 6585 times)
0 Members and 1 Guest are viewing this topic.
AgG
Guest
crystallography q's
«
on:
November 13, 2005, 04:00:03 AM »
does a substance have to be 100% crystalline in order to perform an X-ray crystal structure determination? What if there are two compounds in your crystal? and lastly, does anyone know of any single crystalline polymers?
Logged
sdekivit
Chemist
Full Member
Posts: 403
Mole Snacks: +32/-3
Gender:
B.Sc Biomedical Sciences, Utrecht University
Re:crystallography q's
«
Reply #1 on:
November 13, 2005, 03:06:33 PM »
2 compunds can be analyzed with X-ray diffraction, think about the interaction between an enzyme bound it's ligand. The interaction between these two molecules can be examined with this technique.
Logged
AgG
Guest
Re:crystallography q's
«
Reply #2 on:
November 13, 2005, 03:20:02 PM »
an interesting point sdekivit and not one that I had originally aniticipated. You are correct, of course, but I was talking more along the lines of an impurity. So, two compounds which crystallize together to form a lattice.
Logged
AWK
Retired Staff
Sr. Member
Posts: 7976
Mole Snacks: +555/-93
Gender:
Re:crystallography q's
«
Reply #3 on:
November 14, 2005, 02:00:34 AM »
Substance that can be examined by X-ray should be crystalline, but it does mean 100 %. There are many substances that are disordered, and its structure can be solved. At the moment I am doinh with substancet that show 25 % of disorder (measured as scattering power for X-ray) and they be solved without any trouble
(but their refinemet is horrible).
Crystalline polymers are always disordered in some extent
Logged
AWK
Print
Pages: [
1
]
Go Up
« previous
next »
Sponsored Links
Chemical Forums
Chemistry Forums for Students
Inorganic Chemistry Forum
crystallography q's