Platinum
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, platinum 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.
Platinum
Platinum is, in a way, the best metal for jewelry rather than silver or gold, which does not stain like silver.
Since several jewelers began to use the metal in the late 1800s, platinum quickly grew in popularity, becoming particularly fashionable for the establishment of colorless stones, which lasted until 1940, when platinum use was restricted to industrial production of chemicals needed to strengthen the war. Platinum has been replaced by white gold because of these restrictions, but has returned to be popular in recent years.
Platinum alloys are used in a wide range of configurations where chemical inertia or wear resistance are important, including medical devices, laboratory instruments, electrical contacts, spark plugs and turbine engines.
Description:
Symbol: Pt
Atomic number: 78
Atomic weight: 195,084
Element Category: transition metal
Group, period, block: 10, 6, d
Color: silver-white
Other names: Platinum
Physical properties
Melting point: 1768, 3215, 2041 K
Boiling point: 3825, 6917, 4098 K
Density: 21.45 g · cm 3
Liquid Density = 19.77 g · cm 3
Density @ 20 ° C: 21.45 g / cm 3
Density of solid: 21090 kg · m 3
Specific heat: 0.13 (kJ / kg K)
Triple Point: 2045 K, 2.0 × 10 4 kPa
Heat of Melting (kJ · mol -1): 19.7
Heat of Vaporization (kJ · mol -1): 469
Heat of Atomization (kJ · mol -1): 564.42
Thermal conductivity: 71.6 W · m -1 · K -1
Thermal expansion: (25 ° C) 8.8 μm · m -1 · K -1
Electrical resistivity: (20 ° C) 105 n · m
Tensile strength: 125-240 MPa
Molar heat capacity: 25.86 J · mol -1 · K -1
Young's modulus: 168 GPa
Shear modulus: 61 GPa
Bulk module: 230 GPa
Poisson ratio: 0.38
Hardness of Mohs: 4-4.5
Vickers Hardness: 549 MPa
Brinell hardness: 392 MPa
Sound Speed: (rt) 2800 m · s -1
Pauling's electronegativity: 2.28
Allred Rochow Electronegativity: 1.44
Pauling's electropositivity: 1.72
Reflectivity (%): 73
Chemical properties
Electrons: 78
Protões: 78
Neutron: 117
Electronic configuration: [Xe] 4f 14 5d 9 6s 1
Atomic radius: 139 p.m.
Atomic radius, unbound (Å): 2.13
Covalent Ray: 136: 17h
Covalent Radius (Å): 1.3
Van der Waals radius: 175 pm
Oxidation states: 6, 5, 4, 3, 2, 1, 1, 2, 3 (moderately basic oxide)
Solid state
Crystal structure: centered on the cubic face
Magnetic ordering: paramagnetic
Electronic affinity: (kJ · mol -1) 205,321
1st ionization energy: 864.39 kJ · mol -1
2nd ionization energy: 1791.07 kJ · mol -1