The Rhodium with silver inquart assay.

Adding 1 mL of Rhodium Chloride (same as 1 mg of Rh metal) to the fluxes which has a silver bead to collect the Rh for Parting in nitric acid.

Completed Rh melt – button at left bottom. Good fusion clear slag. A slightly different colored slag than the other melts.

The Rh Lead button = 39 grams. This very strange as to why such a weight change from when exactly the same fluxes were used.
The cleaned Lead button ready for cupellation.
The Cleaning Lead button should be done carefully to not scrape off any clinging pgms that often reside on the bottom side of the Lead buttons.

10X – the resultant RhAg bead. I have noticed that Rh contaminated silver beads often have a cauliflower appearance.
Size of this bead = 0.06” which is almost the same size as inquarted, suggesting silver or Rh loss.

20x – Magnified view of preceding image, while still in the bone ash cupel.

20x – The RhAg prill on glass slide in 1 drop of HNO3 & 2 drops of H2O gently nudged with heat to initiate the acid attack on the silver.

20X – same as previous image but focus on blacks at bottom and side of prill

10x – The Ag is completely dissolved leaving behind this odd mass of blacks that have no definite crystalline structure.