Pararealgar alteration of Realgar - Getchell Mine, Nevada


We are able to see the progression of realgar to pararealgar:

 

Note: The problem with the baseline subtraction (green) is due to fitting the spectrum in parts because of memory constraints.
This will be corrected later... 
 

The graphic below is from this source: Arsenic sulfide nanoparticles prepared by milling It shows the alteration of realgar to pararealgar upon exposure to sunlight (XRD left, Raman right). Compare it to the above: