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: [log in to unmask]
> [mailto:[log in to unmask]] On Behalf Of Pavel Afonine
> Sent: 11 January 2009 03:01
> To: Ethan A Merritt
> Cc: [log in to unmask]
> 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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