Iridyum
77
Ir
Grup
9
Periyot
6
Blok
d
Protonlar
Elektronlar
Nötronlar
77
77
115
Temel Özellikleri
Atom numarası
77
Atom ağırlığı
192,217
Kütle Numarası
192
Kategori
Geçiş metalleri
Renk
Gümüşi
Radyoaktif
Hayir
From the Latin word iris meaning rainbow
Kristal yapısı
Yüzey merkezli kübik
Tarihi
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.
Enerji seviyesi başına Elektronlar
2, 8, 18, 32, 15, 2
Elektron dizilimi
[Xe] 4f14 5d7 6s2
Iridium is the most corrosion-resistant metal known
Fiziksel Özellikleri
Faz
Katı
Yoğunluk
22,56 g/cm3
Ergime noktası
2739,15 K | 2466 °C | 4470,8 °F
Kaynama noktası
4701,15 K | 4428 °C | 8002,4 °F
Ergime ısısı
26 kJ/mol
Buharlaşma ısısı
560 kJ/mol
Isı kapasitesi
0,131 J/g·K
Dünya kabuğundaki bulunulabilirliği
4×10-8%
Evrendeki bulunulabilirliği
2×10-7%
CAS Numarası
7439-88-5
PubChem CID Numarası
23924
Atom Özellikleri
Atom yarıçapı
136 pm
Kovalent yarıçapı
141 pm
Elektronegatifliği
2,2 (Pauling ölçeği)
İyonlaşma enerjisi
8,967 eV
Atomik Hacim
8,54 cm3/mol
Isıl iletkenlik
1,47 W/cm·K
Yükseltgenme seviyeleri
-3, -1, 1, 2, 3, 4, 5, 6, 7, 8, 9
Uygulamalar
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
İzotoplar
Kararlı izotoplar
191Ir, 193IrKararsız 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