The ten metals are all rare metals, respectively, rare earths, tungsten, antimony, molybdenum, tin, indium, germanium, gallium, tantalum and zirconium.
1, iridium is 12 times thinner than gold in the earth's crust, high density, iridium is usually used to harden platinum, has a high melting point, and hard, fragile.
2, rhodium a platinum group metals, rhodium is fragile, usually as a powder. Electrical contacts and catalytic converters use rhodium, it can harden palladium and platinum alloys. Because the solution of rhodium salt shows the light red color of rose, 1803 by Wollaston discovered and separated. Rhodium is an element of the platinum family.
3, rhenium has the highest boiling point, melting point of the third, is a rare silver-white metal. Rhenium named after the Rhine River, nickel-plated rhenium is a jet engine parts. Rhenium can play a special role, by strengthening the interface strength so that the material is not easy to fracture, and thus promote the optimization of material properties.
4, gold gold is a widely needed precious metal, occupies a unique position in human history. Gold is a symbol of power, wealth and security.
5, PalladiumPalladium is an expensive member of the platinum group and is an important component of catalytic converters and medical devices. A shiny silver-white metal.