Ir Keyring 20x30 mm. Articul: pt77
Ir keychain 20x40 mm. Articul: 77777
Iridium keychain 20x40.
Iridium (Ir), 99.95%, 0.04 gr. - wire. Articul: 7752141119
1 300,00 ₽
Ir acrylic cube 25x25x25 mm. Articul: ac77
1 400,00 ₽
Ir. Chemical button 18 mm. Articul: but77
Atomic number 77
Atomic mass 192,22
Density, kg / m? span > 22400
melting, ° С 2410
Iridium is a very hard, refractory, silvery-white transition metal of the platinum group, which has a high density and is comparable in this parameter only with osmium. It has high corrosion resistance even at a temperature of 2000 ° C.
The element was discovered in 1804 by the English chemist S. Tennant (1761-1815) and named "Iridium" (from the Greek iris, genus iridos - rainbow) due to the varied colors of its salts. It is rarely found in the earth's crust, mainly as a satellite of platinum. & Nbsp;