... despite these informations, I still prefer "structure factor
amplitude", because it is the amplitude of the "structure factor" ...
Best regards,
Dirk.
Am 12.01.2009 um 11:42 schrieb Ian Tickle:
I was taught 'structure amplitude' - makes perfect sense to me! Why
does 'structure amplitude' make any less sense than 'structure
factor'?
It also clearly made sense to Phil Coppens, a crystallographer of
considerable repute, see ITC Vol. B (2nd Ed.), sect 1.2., p.10: 'The
Structure Factor'. To quote the introduction to the section: "The
'structure factor' is the central concept in structure analysis by
diffraction methods. Its modulus is called the 'structure
amplitude'".
Also I did a 'Google vote' for the two terms. 'Structure amplitude'
has
11300 hits. 'Structure factor amplitude' has only 4750. So all
round I
would say that 'structure amplitude' wins by a considerable margin.
Cheers
-- Ian
-----Original Message-----
From: owner-ccp...@jiscmail.ac.uk
[mailto:owner-ccp...@jiscmail.ac.uk] On Behalf Of Pavel Afonine
Sent: 11 January 2009 03:01
To: Ethan A Merritt
Cc: CCP4BB@jiscmail.ac.uk
Subject: Re: [ccp4bb] structure (factor) amplitude
On 1/10/2009 5:14 PM, Ethan A Merritt wrote:
On Saturday 10 January 2009, Bernhard Rupp wrote:
Dear All,
I am getting conflicting comments on the use of
'structure factor amplitude'
vs. just
'structure amplitude'
for |F|.
???
That's just... odd.
|F| is the amplitude of F.
But no way F is a "structure".
I agree. If F is a structure factor then |F| is a structure
factor amplitude. "structure amplitude" doesn't make much sense...
Pavel.
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