What makes a precious metal precious are its chemical properties. All of these metals are not affected, or are scarcely affected, by oxidation. As a result, precious metals retain the same fixed mass as well as their quality and value. They are ideal for jewels and coins
Characteristics of precious metals
- Precious metals withstand corrosion
- The chemical bonds in precious metals are thermally unstable. This means that they do not rust or oxidize, but their bonded structure changes drastically upon heating.
- Precious metals are in general not affected by hydrochloric acid.
- There are also chemical properties that other metals have, similar to copper, gold, and silver.
The eight precious metals with their symbols and atomic numbers
- Gold (Au, 79)
- Silver (Ag, 47)
- Ruthenium (Ru, 44)
- Rhodium (Rh, 45)
- Palladium (Pd, 46)
- Osmium (Os, 76)
- Iridium (Ir, 77)
- Platinum (Pt, 78)
The 6 platinum metals ruthenium, rhodium, palladium, osmium, iridium and platinum are also referred to by the abbreviation PGM, which is short for “platinum group metals”.
- Sputtering targets
- Customer-specific parts according to drawing