The equations of state of statically compressed palladium and rhodium.

The pressure–volume equations of state of palladium and rhodium statically compressed in neon are presented. Vinet fits give parameters for palladium: V 0 = 58.678 (73) Å 3 , B 0 = 189.3 (30) GPa, B 0 ′ = 5.473 (63) , and rhodium: V 0 = 55.062 (63) Å 3 , B 0 = 241.3 (65) GPa, B 0 ′ = 5.34 (24). Both metals are observed to react with hydrocarbons under pressure to form hydrides. Existing equations of state are discussed with regard to potential inadvertent hydrogen contamination as a source for discrepancies and anomalous fitted parameters. [ABSTRACT FROM AUTHOR]