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Name Rhodium
Symbol Rh
Atomic number 45
Atomic mass 102.9055 amu
Normal state Solid
Classification Transition Metals
Crystal structure Cubic face centered
Color Silvery-white
Date of discovery 1803
Name of discoverer William H. Wollaston
Name origin From the Latin rhodon, meaning rose, as its diluted salts produce a rosy solution.
Uses Used as a coating to prevent wear on high quality science equipment as well as in headlight reflectors, telephone relays, fountain pen tips and aircraft sparkplugs.
Obtained from Produced as a by-product of nickel refining, but is also found in its natural state in Montana, USA.

Rhodium(RO-dee-em) is a hard, silvery metal.

Additional Properties

Melting Point: 3567 °F (1964 °C or 2237 K)

Boiling Point: 6683 °F (3695 °C or 3968 K)

Density: 12.4 grams per cubic centimeter[1]


The primary use for Rhodium is in catalytic converters for cars.[2]

See also