ഫലകം:Infobox iridium

Iridium, ₇₇Ir

Iridium
Pronunciation	/ɪˈrɪdiəm/ ​(i-RID-ee-əm)
Appearance	silvery white
Standard atomic weight Ar, std(Ir)	192.217(2)
Iridium in the periodic table
Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson Rh ↑ Ir ↓ Mt osmium ← iridium → platinum
Atomic number (Z)	77
Group	group 9
Period	period 6
Block	d-block
Element category	Transition metal
Electron configuration	[Xe] 4f14 5d7 6s2
Electrons per shell	2, 8, 18, 32, 15, 2
Physical properties
Phase at STP	solid
Melting point	2719 K ​(2446 °C, ​4435 °F)
Boiling point	4403 K ​(4130 °C, ​7466 °F)
Density (near r.t.)	22.56 g/cm3
when liquid (at m.p.)	19 g/cm3
Heat of fusion	41.12 kJ/mol
Heat of vaporization	564 kJ/mol
Molar heat capacity	25.10 J/(mol·K)
Vapor pressure P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 2713 2957 3252 3614 4069 4659
Atomic properties
Oxidation states	−3, −1, 0, +1, +2, +3, +4, +5, +6, +7, +8, +9
Electronegativity	Pauling scale: 2.20
Ionization energies	1st: 880 kJ/mol 2nd: 1600 kJ/mol
Atomic radius	empirical: 136 pm
Covalent radius	141±6 pm
Spectral lines of iridium
Other properties
Natural occurrence	primordial
Crystal structure	​face-centered cubic (fcc)
Speed of sound thin rod	4825 m/s (at 20 °C)
Thermal expansion	6.4 µm/(m·K)
Thermal conductivity	147 W/(m·K)
Electrical resistivity	47.1 nΩ·m (at 20 °C)
Magnetic ordering	paramagnetic
Magnetic susceptibility	+25.6·10−6 cm3/mol (298 K)
Young's modulus	528 GPa
Shear modulus	210 GPa
Bulk modulus	320 GPa
Poisson ratio	0.26
Mohs hardness	6.5
Vickers hardness	1760–2200 MPa
Brinell hardness	1670 MPa
CAS Number	7439-88-5
History
Discovery and first isolation	Smithson Tennant (1803)
Main isotopes of iridium
Iso­tope Abun­dance Half-life (t1/2) Decay mode Pro­duct 188Ir syn 1.73 d ε 188Os 189Ir syn 13.2 d ε 189Os 190Ir syn 11.8 d ε 190Os 191Ir 37.3% stable 192Ir syn 73.827 d β− 192Pt ε 192Os 192m2Ir syn 241 y IT 192Ir 193Ir 62.7% stable 193mIr syn 10.5 d IT 193Ir 194Ir syn 19.3 h β− 194Pt 194m2Ir syn 171 d IT 194Ir

Ir data m.p. cat
	in	calc from C	diff	report	ref
C	2446	—	—
K	2719	2,719
F	4435	4,435
WD
input	C: 2446, K: 2719, F: 4435
comment

Ir data b.p. cat
	in	calc from C	diff	report	ref
C	4130	—	—
K	4403	4,400
F	7466	7,470
WD
input	C: 4130, K: 4403, F: 7466
comment

PTIridium

	iso 77Ir  infobox  isobox	→ H i'box H
Commons  Wikidata:  Wiktionary Indexes in PT: § below · Page

Data sets read by {{Infobox element}}
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Pronunciation
Category (enwiki)
Standard atomic weight
most stable isotope
Oxidation states
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References

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ഫലകം:വിവരണം/ഭാഗം