Rare, lustrous, silvery, hard mental of the platinum group.
Stable in air up to 875 K. Inert to all acids, attacked by fused alkalis.
Used as a catalyst.
Diagnostic tests:
There are no simple chemical tests for rhodium. The element is usually
found as an alloy or a sulfide mineral with other platinum group metals. Atomic Absorption
Spectroscopy is used for quantitative analysis and Energy Dispersive
Analysis of X-rays (EDAX) is used for qualitative analysis.
References
Emsley, J., 1991; THE ELEMENTS : Sec. Ed.,
Clarendon Press, Oxford, 251 p.
(* - Mineral Name Is Not IMA Approved)
(! - New Dana classification added or changed from Danas New Mineralogy)
(? - IMA Discredited Mineral Species Name)
There are 20 minerals with Rh in the Mineralogy Database.