EDS of BiOCl (Conductivity)

For EDS mode of SEM, would you need to create a conductive path to ground for a BiOCl sample material. I have researched and found that gold and carbon can be used for such purposes, but I thought that BiOCl is conductive enough for grounding to occur. 


The reason I'm asking this is I was reading a research article, and I came across the following EDS spectra of BiOCl:
[![enter image description here](https://i.stack.imgur.com/zdXFP.png)](https://i.stack.imgur.com/zdXFP.png)


I believe that on the left side "Cl" in purple is mislabelled, as Chlorine only has K-series emission, and the energy of such emission is greater than oxygen, so this led me to believe that the material is has to be smaller than Oxygen, and Carbon seems to be the obvious choice, but the research paper doesn't mention using anything apart BiOCl, and the mount which consists of Al and Cu. 


Many Thanks


