S has about 0.56 anomalous electrons at 8 keV, whereas P has about 0.44. This is a small difference between two weak signals—unlikely to give a clear result. If you could get to the sulfur & phosphorus edges, then you could (in principle) answer this, but that’s a very hard experiment to accomplish.
> Begin forwarded message: > > From: jlliu20022002 liu <jlliu20022...@gmail.com> > Subject: Re: [ccp4bb] SO4 or PO4 > Date: February 16, 2019 at 11:14:07 AM EST > To: CCP4BB@JISCMAIL.AC.UK > Reply-To: jlliu20022002 liu <jlliu20022...@gmail.com> > > How about collect data at sulfur peak. You might see anomalous peak for > sulfur. > > Jinyu > > On Sat, Feb 16, 2019 at 4:07 AM 张士军 <21620150150...@stu.xmu.edu.cn > <mailto:21620150150...@stu.xmu.edu.cn>> wrote: > Dear all > > I have got a crystal grown at the condition both have ion of SO4 and PO4, and > the diffraction resolution is very well, but the problem is coming: how to > tell which is which just from electron density? I think they are exactly > same. Thanks a lot !!! > > Beat Regards > > Shijun > > > To unsubscribe from the CCP4BB list, click the following link: > https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4BB&A=1 > <https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4BB&A=1> > To unsubscribe from the CCP4BB list, click the following link: > https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4BB&A=1 > <https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4BB&A=1> --------------------------------------------------------------------------------------- Patrick J. Loll, Ph. D. Professor of Biochemistry & Molecular Biology Drexel University College of Medicine Room 10-102 New College Building 245 N. 15th St., Mailstop 497 Philadelphia, PA 19102-1192 USA (215) 762-7706 pjl...@gmail.com pj...@drexel.edu ######################################################################## To unsubscribe from the CCP4BB list, click the following link: https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4BB&A=1
