Yes, thank you Bob! and therefore, as first pointed out in this thread
by Loes Kroon-Batenburg, and as explainedin (among other places)
the Ladd and Palmer book that Dom Bellini pointed me to,
the indices 001, 010 etc. for example, will index first order diffraction
maxima,
while 002, 020 etc. will be the indices for the second order diffraction maxima
from the same sets of lattice planes.
I feel now reconciled with Bragg's law (although for obvious reasons
I like Ewald's constructions much better) and this is happening
just in time for next year's 2014 IUCr celebrations :-)
Thank you all contributors to the thread!
Regards
Pietro
Sent from my Desktop
Dr. Pietro Roversi
Oxford University Biochemistry Department - Glycobiology Division
South Parks Road
Oxford OX1 3QU England - UK
Tel. 0044 1865 275339
________________________________
From: CCP4 bulletin board [CCP4BB@JISCMAIL.AC.UK] on behalf of Robert Blessing
[bless...@hwi.buffalo.edu]
Sent: 23 August 2013 15:52
To: CCP4BB@JISCMAIL.AC.UK
Subject: [ccp4bb] sin(theta_hkl)=n*lambda/(2*d_hkl)
A point to bear in mind is that only planes with co-prime h k l indices are
"lattice planes" that pass through lattice points. Planes with indices that
are composite numbers nh nk nl are "virtual lattice planes" that do not pass
through lattice points.
Bob
Robert H. Blessing, Ph.D.
Hauptman-Woodward Medical Research Institute, Inc.
and
State University of New York
at Buffalo
Hauptman-Woodward Institute
700 Ellicott Street
Buffalo, New York 14203, USA
Phone 716-898-8613
Fax 716-898-8660
eMail bless...@hwi.buffalo.edu<mailto:bless...@hwi.buffalo.edu>
Internet http://www.hwi.buffalo.edu<http://www.hwi.buffalo.edu/>
