Worst of all, #Graphite is rarely ordered and stacking faults make #PXRD much harder to interpret correctly.

#TeamQuartz

How did it come down to the two WORST minerals?

Quartz: Scratches my sample holders up, shows up like stink in mineral samples making it hard to see the other phases

Graphite: SUPER slippery, slides out of the sample holder and contaminates other samples, pain to clean up

#MineralCup #PXRD

🎉 Congrats to Celia at Harvard Art Museums🔬 Deadly Red: Photochemical Alterations in Bonazziite, Realgar, Pararealgar, and Other Arsenic Sulfide Pigments
doi.org/10.1021/acs....
Light exposure+#Raman, 2D #PXRD & spectrophotometry reveal phase/color changes with light dose #crystallography #education