08/08/2016
User:

Is the K edge of Sr (16.1046 keV, 0.7699 A) accessible at 8.3.1?
I have some crystals of a calcium-binding protein that I've grown with strontium. 
There may be as many as 20-30 Sr bound to each monomer.
I could also try lanthanides, but Sr seems like a good calcium replacement for this particular protein.

James:
Yes, we can get there.  
Only 1.6 kGy/s, 
so crystals will last for 5 hours before they die, 
having given off the same number of photons they do in 5 minutes 
at our usual data collection energy of 11111 eV.  
But you can certainly still collect data.