Iridiy
77
Ir
Guruh
9
Davr
6
Block
d
Protonlar
Elektronlar
Neytronlar
77
77
115
General Properties
Atom raqami
77
Atom massasi
192,217
Mass Number
192
Turkum
Oʻtish metallar
Ranggi
Silver
Radioaktivlik
Yoʻq
From the Latin word iris meaning rainbow
Crystal Structure
Face Centered Cubic
Tarix
Iridium was discovered in 1803 by English chemist Smithson Tennant in London.
Chemists who studied platinum dissolved it in aqua regia to create soluble salts and observed a small amount of a dark, insoluble residue.
Smithson Tennant analyzed the insoluble residue and concluded that it must contain a new metal.
Chemists who studied platinum dissolved it in aqua regia to create soluble salts and observed a small amount of a dark, insoluble residue.
Smithson Tennant analyzed the insoluble residue and concluded that it must contain a new metal.
Electrons per shell
2, 8, 18, 32, 15, 2
Elektron konfiguratsiyasi
[Xe] 4f14 5d7 6s2
Iridium is the most corrosion-resistant metal known
Physical Properties
Phase
Qattiq modda
Zichlik
22,56 g/cm3
Erish harorati
2739,15 K | 2466 °C | 4470,8 °F
Qaynash harorati
4701,15 K | 4428 °C | 8002,4 °F
Heat of Fusion
26 kJ/mol
Heat of Vaporization
560 kJ/mol
Solishtirma issiqlik sigʻimi
0,131 J/g·K
Abundance in Earth's crust
4×10-8%
Abundance in Universe
2×10-7%
CAS Number
7439-88-5
PubChem CID Number
23924
Atomic Properties
Atom radiusi
136 pm
Kovalentlik radiusi
141 pm
Elektrmanfiylik
2,2 (Poling boʻyicha)
Ionization Potential
8,967 eV
Molyar hajm
8,54 cm3/mol
Issiqlik oʻtkazuvchanlik
1,47 W/cm·K
Oksidlanish darajasi
-3, -1, 1, 2, 3, 4, 5, 6, 7, 8, 9
Applications
Iridium is used in making crucibles and other equipment that is used at high temperatures.
Iridium is also used as a hardening agent in platinum alloys.
Its resistance to arc erosion makes iridium alloys ideal for electrical contacts for spark plugs.
Radioactive isotopes of iridium are used in radiation therapy for the treatment of cancer.
Iridium is also used as a hardening agent in platinum alloys.
Its resistance to arc erosion makes iridium alloys ideal for electrical contacts for spark plugs.
Radioactive isotopes of iridium are used in radiation therapy for the treatment of cancer.
Iridium is considered to be of low toxicity
Izotoplar
Barqaror izotoplar
191Ir, 193IrBeqaror izotoplar
164Ir, 165Ir, 166Ir, 167Ir, 168Ir, 169Ir, 170Ir, 171Ir, 172Ir, 173Ir, 174Ir, 175Ir, 176Ir, 177Ir, 178Ir, 179Ir, 180Ir, 181Ir, 182Ir, 183Ir, 184Ir, 185Ir, 186Ir, 187Ir, 188Ir, 189Ir, 190Ir, 192Ir, 194Ir, 195Ir, 196Ir, 197Ir, 198Ir, 199Ir