Negara

Re ( Rhenium )

Keterangan

     Rhenium is a metallic element that has a very high tensile strength (80,000psi), high modulus of elasticity, is virtually insoluble in hydrochloric acid and does not oxidize or corrode in saltwater. In addition it has the widest range of valences of any element and it retains its crystalline structure all the way to its melting point. Alloys of rhenium-molybdenum are superconductive at 10K.

Nama lain (trademark, branding etc.)

Rhenium, Renij, Rhenium - s, Rênio, Рений,

Spesifikasi Produk

Overview of Rhenium Atomic Number 75 Group 7 Period 6 Series Transition Metals Atomic Mass Average:  186.207 Relative Atomic Mass (12C=12.000)  186.2 Boiling Point:  5900K 5627°C 10161°F Melting Point:  3453K 3180°C 5756°F Density/kg m-3  21020 (293K) Ground State Electron Configuration  [Xe]4f145d56s2 Electron Affinity(M-M-)/kJ mol-1  -37 Discovered  W. Noddack Discovered Location Berlin, Germany. Discovery Year 1925 Name Origin Greek, Rhenus for the Rhine River.

Aplikasi

     It is added to tungsten and molybdenum alloys and is used in refractory metal components of missiles, electronic filaments, electrical contacts, high-temperature thermocouplers, oven filaments, electrodes, igniters for flash bulbs, jewelry, plating of metals by electrolysis and vapor-phase deposition.

Bahan Baku

Rhenium is a chemical element with the symbol Re and atomic number 75. It is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table. With an estimated average concentration of 1 part per billion (ppb), rhenium is one of the rarest elements in the Earth's crust. The free element has the third-highest melting point and highest boiling point of any element. Rhenium resembles manganese chemically and is obtained as a by-product of molybdenum and copper ore's extraction and refinement. Rhenium shows in its compounds a wide variety of oxidation states ranging from −1 to +7.

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