Re: [ccp4bb] Anisotropy and temperature

2017-01-19 Thread Stephen Rader
> Diffraction measurements at a single temperature do not distinguish > between these two components. In principle a series of diffraction > measurements from the same crystal at different temperatures would > allow partitioning the observed vibrational into the two components. > [Burgi (2000)

Re: [ccp4bb] Anisotropy and temperature

2017-01-19 Thread Ethan A Merritt
On Thursday, 19 January, 2017 20:35:14 you wrote: > A PhD student asked me what causes diffraction anisotropy. Quoting from the > Diffraction Anisotropy Server webpage that it is caused by whole-body > anisotropic vibration of unit cells. He asked whether a colder cyrostream > could improve

Re: [ccp4bb] Anisotropy and temperature

2017-01-19 Thread Keller, Jacob
sage- From: CCP4 bulletin board [mailto:CCP4BB@JISCMAIL.AC.UK] On Behalf Of D Bonsor Sent: Thursday, January 19, 2017 3:35 PM To: CCP4BB@JISCMAIL.AC.UK Subject: [ccp4bb] Anisotropy and temperature A PhD student asked me what causes diffraction anisotropy. Quoting from the Diffraction Aniso

[ccp4bb] Anisotropy and temperature

2017-01-19 Thread D Bonsor
A PhD student asked me what causes diffraction anisotropy. Quoting from the Diffraction Anisotropy Server webpage that it is caused by whole-body anisotropic vibration of unit cells. He asked whether a colder cyrostream could improve anisotropy. My answer would be yes, as colder temperatures