Aqueous solution s of many of its salts are rose colored, from which its name is derived. The metal occurs as an alloy in platinum ores, in osmiridium, and in gold -rhodium ores called rhodite. Of the elements in the crust of the earth, it ranks 81st in order of abundance. The atomic weight of rhodium is 102.905. Pure rhodium is used as a mirror surface in searchlights and as a plating finish for jewelry and silverware.
Rhodium black is a finely divided metal that contains some oxide and hydride.
It is used both as a catalyst and as a black pigment for porcelain ware. All Rights Reserved Worldwide.