Rhodium
We are specialists in semi-finished steel and metal products, as well as standard parts. We have a wide range of products in our large warehouse located in Europe which is constantly growing and is designed according to high quality standards.
We sell all over Europe, rhodium and other refractory metals. We ship within 24 hours for whole Europe. Fast and uncomplicated deliveries.
We sell countless flat, round and square steels and precision tools with various dimensions and profiles.
Purchase refractory metals such as rhenium, molybdenum, copper, brass, bronze, aluminum, osmium, ruthenium, iridium, rhodium, palladium, tantalum, titanium, platinum, nickel alloys, pure tungsten, niobium, silver and composite metals and gold.
We work together with more than 10,000 clients from the mechanical engineering, tool manufacturing, mold manufacturing, cabinet construction, factory building and metal structures industries.
Rhodium
Rhodium is a hard, durable metal with a shiny silver appearance and high corrosion resistance. It is one of the rarest metals in the earth's crust.
Rhodium-based catalysts are widely used in industrial processes and other applications of organic chemistry.
Rhodium is used as an alloying agent that improves corrosion resistance and increases the hardness of platinum and palladium.
Rhodium-containing alloys are used in spark plugs, advanced laboratory equipment and in thermocouples.
In jewelry making, they are galvanized in white gold or platinum, extremely thin layers of the precious metal to give a reflective white surface, this is a process known as "intermittent rhodium".
Description:
Symbol: Rh
Atomic number: 45
Atomic weight: 102.9055
Element Category: transition metal
Group, period, block: 9, 5, d
Color: silver metallic white / silver-white
Other names: Rodio, Ródio
Physical properties
Melting point: 1964, 3567, 2237 K
Boiling point: 3695, 6683, 3968 K
Density: 12.41 g · cm 3
Bulk Density: 10.7 g · cm 3
Density @ 20 ° C: 12.4 g / cm 3
Solid density: 12450 kg · m 3
Specific heat: 0.24 (kJ / kg K)
Heat of Melting (kJ · mol -1): 21.55
Heat of Vaporization (kJ · mol -1): 494.34
Heat of Atomization (kJ · mol -1): 555.59
Thermal conductivity: 150 W · m -1 · K -1
Thermal expansion: (25 ° C) 8.2 μm · m -1 · K -1
Electrical resistivity: (0 ° C) 43.3 m · m
Molar heat capacity: 24.98 J · mol -1 · K -1
Young's modulus: 380 GPa
Shear modulus: 150 GPa
Bulk module: 275 GPa
Poisson ratio: 0.26
Hardness of Mohs: 6
Vickers Hardness: 1246 MPa
Brinell Hardness: 1100 MPa
Sound velocity: (20 ° C) 4700 m · s -1
Pauling's electronegativity: 2.28
Allred Rochow Eletronegativity: 1.45
Pauling's electropositivity: 1.72
Reflectivity (%): 84
Chemical properties
Electrons: 45
Protons: 45
Neutron: 58
Electronic configuration: [Kr] 4d 8 5s 1
Atomic radius: 134 pm
Atomic radius, unbound (Å): 2.1
Covalent Ray: 142 ± 19:00
Covalent Ray (Å): 1.34
Van der Waals radius: 200 pm
Oxidation states: 6, 5, 4, 3, 2, 1, -1 (amphoteric oxide)
Solid state
Crystal structure: centered on the cubic face
Magnetic ordering: paramagnetic
Electronic affinity (kJ · mol -1) 109,665
1st ionization energy: 719.68 kJ · mol -1
2nd ionization energy: 1744.47 kJ · mol -1
3rd ionization energy: 2996.86 kJ · mol -1