Dennis Cravens advised me -- This is the best paper I found on JM Pd materials.
http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwikhLXT68vOAhVV5GMKHRG4DQcQFggwMAA&url=http%3A%2F%2Fwww.technology.matthey.com%2Fpdf%2Fpmr-v21-i2-044-050.pdf&usg=AFQjCNGNmbvWIWMUD-N4WC5km2BWw7OwZw&sig2=l0kti33UpPBozxwb6uHSjQ [I think] Ag and Ce is good by Y is better. I think that the “boil off” was with Ce and Sm in the Pd.
