Iridium

Iridium (Ir)

chemical element with symbol Ir and atomic number 77
Atomic Number77
Atomic Weight192.217
Massagetal193
Group9
Period6
Blockd
proton77 p+
neutron116 n0
elektron77 e-
Animated Bohr model of Ir (Iridium)

Physical Property

Atoomradius
135 pm
molar volume
Covalent Radius
122 pm
Metallic Radius
127 pm
Ioonradius
68 pm
Crystal Radius
82 pm
Van der Waals radius
213 pm
density
22,5622 g/cm³
Atomic Radii Of The Elements: Iridium020406080100120140160180200220pmAtoomradiusCovalent RadiusMetallic RadiusVan der Waals radius

Chemical Property

energie
proton affinity
electron affinity
ionization energy
8,96702 eV/particle
ionization energy of Ir (Iridium)
Verdampingswarmte
604 kJ/mol
smeltingswarmte
27,61 kJ/mol
Vormingsentalpie
669 kJ/mol
elektron
Elektronskil2, 8, 18, 32, 15, 2
Bohr model: Ir (Iridium)
Valenselektrone2
Lewisteorie: Ir (Iridium)
elektronkonfigurasie[Xe] 4f14 5d7 6s2
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 4f14 5d7 6s2
Enhanced Bohr model of Ir (Iridium)
Orbital Diagram of Ir (Iridium)
Oksidasietoestand-3, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
Elektronegatiwiteit
2.2
Electrophilicity Index
1,872465121129725 eV/particle
fundamental state of matter
phase of matterSolid
gaseous state of matter
Boiling Point
4 701,15 K
Melting Point
2 719,15 K
critical pressure
critical temperature
triple point
appearance
kleur
Silver
appearancesilvery white
Brekingsindeks
thermodynamic material property
Thermal Conductivity
thermal expansion
0,0000064 1/K
molar heat capacity
Specific Heat Capacity
0,131 J/(g⋅K)
heat capacity ratio
electrical properties
typeConductor
Geleidingsvermoë
21 MS/m
Elektriese resistiwiteit
0,00000004699999999998 m Ω
superconductivity
0,11 K
Magnetisme
typeparamagnetic
magnetic susceptibility (Mass)
0,00000000167 m³/Kg
magnetic susceptibility (Molar)
0,000000000321 m³/mol
magnetic susceptibility (Volume)
0,0000377
magnetic ordering
Curie temperature
Néel temperature
structure
Crystal StructureFace Centered Cubic (FCC)
lattice constant
3,84 Å
Lattice Anglesπ/2, π/2, π/2
mechanical property
hardness
6,5 MPa
Massamodulus
320 GPa
Skuifmodulus
210 GPa
Young se modulus
528 GPa
Poisson se verhouding
0,26
Spoed van klank
4 825 m/s
classification
CategoryTransition metals, Transition metals
CAS GroupVIIIA
IUPAC GroupVIII
Glawe Number62
Mendeleev Number65
Pettifor Number65
Geochemical Classnoble metal
Goldschmidt classificationsiderophile

other

Gas Basicity
polarizability
54 ± 7 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section
425
Neutron Mass Absorption
0,081
quantum number4F9/2
Ruimtegroep225 (Fm_3m)

Isotopes of Iridium

Stable Isotopes2
Unstable Isotopes41
Natural Isotopes2
Isotopic Composition19362.70%19362.70%19137.30%19137.30%

163Ir

Massagetal163
neutron number86
relative atomic mass
162,994299 ± 0,000429 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
spin1/2
nuclear quadrupole moment
0
ontdekkingsdatum
parity+

decay modeintensity
p (proton emission)

164Ir

Massagetal164
neutron number87
relative atomic mass
163,991966 ± 0,000339 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
spin2
nuclear quadrupole moment
ontdekkingsdatum
parity-

decay modeintensity
p (proton emission)
α (α emission)
β+ (β+ decay; β+ = ϵ + e+)

165Ir

Massagetal165
neutron number88
relative atomic mass
164,987552 ± 0,00017 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
spin1/2
nuclear quadrupole moment
0
ontdekkingsdatum
parity+

decay modeintensity
p (proton emission)
α (α emission)

166Ir

Massagetal166
neutron number89
relative atomic mass
165,985716 ± 0,000215 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
10,5 ± 2,2 ms
spin2
nuclear quadrupole moment
ontdekkingsdatum1981
parity

decay modeintensity
α (α emission)93%
p (proton emission)7%

167Ir

Massagetal167
neutron number90
relative atomic mass
166,981671973 ± 0,000019694 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
29,3 ± 0,6 ms
spin1/2
nuclear quadrupole moment
0
ontdekkingsdatum1981
parity+

decay modeintensity
α (α emission)43.5%
p (proton emission)38.6%
β+ (β+ decay; β+ = ϵ + e+)

168Ir

Massagetal168
neutron number91
relative atomic mass
167,979960978 ± 0,000059277 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
230 ± 50 ms
spin2
nuclear quadrupole moment
ontdekkingsdatum1978
parity

decay modeintensity
α (α emission)100%
β+ (β+ decay; β+ = ϵ + e+)
β+ p (β+-delayed proton emission)

169Ir

Massagetal169
neutron number92
relative atomic mass
168,976281743 ± 0,00002502 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
353 ± 4 ms
spin1/2
nuclear quadrupole moment
0
ontdekkingsdatum1978
parity+

decay modeintensity
α (α emission)53%
β+ (β+ decay; β+ = ϵ + e+)

170Ir

Massagetal170
neutron number93
relative atomic mass
169,975113 ± 0,000109 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
910 ± 150 ms
spin3
nuclear quadrupole moment
ontdekkingsdatum1977
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)
α (α emission)5.2%

171Ir

Massagetal171
neutron number94
relative atomic mass
170,97164552 ± 0,000041295 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
3,1 ± 0,3 s
spin1/2
nuclear quadrupole moment
0
ontdekkingsdatum1967
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)
α (α emission)15%

172Ir

Massagetal172
neutron number95
relative atomic mass
171,970607035 ± 0,000034785 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
4,4 ± 0,3 s
spin3
nuclear quadrupole moment
ontdekkingsdatum1967
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)98%
α (α emission)2%

173Ir

Massagetal173
neutron number96
relative atomic mass
172,967505477 ± 0,000011316 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
9 ± 0,8 s
spin1/2
nuclear quadrupole moment
0
ontdekkingsdatum1967
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)96.5%
α (α emission)3.5%

174Ir

Massagetal174
neutron number97
relative atomic mass
173,966949939 ± 0,000012046 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
7,9 ± 0,6 s
spin2
nuclear quadrupole moment
ontdekkingsdatum1967
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)99.5%
α (α emission)0.5%

175Ir

Massagetal175
neutron number98
relative atomic mass
174,964149519 ± 0,000013295 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
9 ± 2 s
spin1/2
nuclear quadrupole moment
0
ontdekkingsdatum1967
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)99.15%
α (α emission)0.85%

176Ir

Massagetal176
neutron number99
relative atomic mass
175,963626261 ± 0,000008679 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
8,7 ± 0,5 s
spin3
nuclear quadrupole moment
ontdekkingsdatum1967
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)96.9%
α (α emission)3.1%

177Ir

Massagetal177
neutron number100
relative atomic mass
176,9613015 ± 0,000021213 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
29,8 ± 1,7 s
spin5/2
nuclear quadrupole moment
ontdekkingsdatum1967
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
α (α emission)0.06%

178Ir

Massagetal178
neutron number101
relative atomic mass
177,961079395 ± 0,000020204 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
12 ± 2 s
spin3
nuclear quadrupole moment
ontdekkingsdatum1972
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

179Ir

Massagetal179
neutron number102
relative atomic mass
178,959117594 ± 0,000010489 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
79 ± 1 s
spin5/2
nuclear quadrupole moment
ontdekkingsdatum1992
parity

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

180Ir

Massagetal180
neutron number103
relative atomic mass
179,959229446 ± 0,000023302 Da
g-factor
0,5 ± 0,04
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
1,5 ± 0,1 m
spin5
nuclear quadrupole moment
ontdekkingsdatum1972
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

181Ir

Massagetal181
neutron number104
relative atomic mass
180,957634691 ± 0,000005631 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
4,9 ± 0,15 m
spin5/2
nuclear quadrupole moment
ontdekkingsdatum1972
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

182Ir

Massagetal182
neutron number105
relative atomic mass
181,958076296 ± 0,000022509 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
15 ± 1 m
spin3
nuclear quadrupole moment
ontdekkingsdatum1961
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

183Ir

Massagetal183
neutron number106
relative atomic mass
182,956841231 ± 0,000026486 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
58 ± 5 m
spin5/2
nuclear quadrupole moment
ontdekkingsdatum1961
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
α (α emission)

184Ir

Massagetal184
neutron number107
relative atomic mass
183,957476 ± 0,00003 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
3,09 ± 0,03 h
spin5
nuclear quadrupole moment
2,41 ± 0,03
ontdekkingsdatum1960
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

185Ir

Massagetal185
neutron number108
relative atomic mass
184,956698 ± 0,00003 Da
g-factor
1,0384 ± 0,0052
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
14,4 ± 0,1 h
spin5/2
nuclear quadrupole moment
ontdekkingsdatum1958
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

186Ir

Massagetal186
neutron number109
relative atomic mass
185,957946754 ± 0,00001774 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
16,64 ± 0,03 h
spin5
nuclear quadrupole moment
-2,55 ± 0,03
ontdekkingsdatum1958
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

187Ir

Massagetal187
neutron number110
relative atomic mass
186,957542 ± 0,00003 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
10,5 ± 0,3 h
spin3/2
nuclear quadrupole moment
0,941 ± 0,011
ontdekkingsdatum1958
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

188Ir

Massagetal188
neutron number111
relative atomic mass
187,958834999 ± 0,000010116 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
41,5 ± 0,5 h
spin1
nuclear quadrupole moment
0,484 ± 0,006
ontdekkingsdatum1950
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

189Ir

Massagetal189
neutron number112
relative atomic mass
188,958722602 ± 0,0000135 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
13,2 ± 0,1 d
spin3/2
nuclear quadrupole moment
ontdekkingsdatum1955
parity+

decay modeintensity
ϵ (electron capture)100%

190Ir

Massagetal190
neutron number113
relative atomic mass
189,960543374 ± 0,00000147 Da
g-factor
0,01 ± 0,0025
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
11,78 ± 0,1 d
spin4
nuclear quadrupole moment
2,87 ± 0,16
ontdekkingsdatum1947
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
e+ (positron emission)0.002%

191Ir

Massagetal191
neutron number114
relative atomic mass
190,960591455 ± 0,000001406 Da
g-factor
0,10013333333333 ± 0,0004
natural abundance
37,3 ± 0,2
radioaktiwiteitStabiele isotoop
HalfleeftydNot Radioactive ☢️
spin3/2
nuclear quadrupole moment
0,816 ± 0,009
ontdekkingsdatum1935
parity+

192Ir

Massagetal192
neutron number115
relative atomic mass
191,962602414 ± 0,00000141 Da
g-factor
0,47925 ± 0,0025
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
73,82 ± 0,014 d
spin4
nuclear quadrupole moment
2,15 ± 0,06
ontdekkingsdatum1937
parity+

decay modeintensity
β (β decay)95.24%
ϵ (electron capture)4.76%

193Ir

Massagetal193
neutron number116
relative atomic mass
192,962923753 ± 0,000001425 Da
g-factor
0,10866666666667 ± 0,0004
natural abundance
62,7 ± 0,2
radioaktiwiteitStabiele isotoop
HalfleeftydNot Radioactive ☢️
spin3/2
nuclear quadrupole moment
0,751 ± 0,009
ontdekkingsdatum1935
parity+

194Ir

Massagetal194
neutron number117
relative atomic mass
193,965075703 ± 0,000001429 Da
g-factor
0,39 ± 0,01
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
19,35 ± 0,07 h
spin1
nuclear quadrupole moment
0,339 ± 0,012
ontdekkingsdatum1937
parity-

decay modeintensity
β (β decay)100%

195Ir

Massagetal195
neutron number118
relative atomic mass
194,965976898 ± 0,000001431 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
2,29 ± 0,17 h
spin3/2
nuclear quadrupole moment
ontdekkingsdatum1952
parity+

decay modeintensity
β (β decay)100%

196Ir

Massagetal196
neutron number119
relative atomic mass
195,968399669 ± 0,000041239 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
52 ± 1,1 s
spin1
nuclear quadrupole moment
ontdekkingsdatum1966
parity

decay modeintensity
β (β decay)100%

197Ir

Massagetal197
neutron number120
relative atomic mass
196,969657217 ± 0,000021588 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
5,8 ± 0,5 m
spin3/2
nuclear quadrupole moment
ontdekkingsdatum1952
parity+

decay modeintensity
β (β decay)100%

198Ir

Massagetal198
neutron number121
relative atomic mass
197,972399 ± 0,000215 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
8,7 ± 0,4 s
spin1
nuclear quadrupole moment
ontdekkingsdatum1973
parity-

decay modeintensity
β (β decay)100%

199Ir

Massagetal199
neutron number122
relative atomic mass
198,973807097 ± 0,000044073 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
7 ± 5 s
spin3/2
nuclear quadrupole moment
ontdekkingsdatum1993
parity+

decay modeintensity
β (β decay)100%

200Ir

Massagetal200
neutron number123
relative atomic mass
199,976844 ± 0,00021 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
43 ± 6 s
spin2
nuclear quadrupole moment
ontdekkingsdatum2008
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)

201Ir

Massagetal201
neutron number124
relative atomic mass
200,978701 ± 0,000215 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
21 ± 5 s
spin3/2
nuclear quadrupole moment
ontdekkingsdatum2008
parity+

decay modeintensity
β (β decay)100%

202Ir

Massagetal202
neutron number125
relative atomic mass
201,982136 ± 0,000322 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
11 ± 3 s
spin2
nuclear quadrupole moment
ontdekkingsdatum2008
parity-

decay modeintensity
β (β decay)100%

203Ir

Massagetal203
neutron number126
relative atomic mass
202,984573 ± 0,000429 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
spin3/2
nuclear quadrupole moment
ontdekkingsdatum2009
parity+

decay modeintensity
β (β decay)

204Ir

Massagetal204
neutron number127
relative atomic mass
203,989726 ± 0,000429 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
spin
nuclear quadrupole moment
ontdekkingsdatum2011
parity

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)

205Ir

Massagetal205
neutron number128
relative atomic mass
204,993988 ± 0,000537 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
spin3/2
nuclear quadrupole moment
ontdekkingsdatum2012
parity+

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
Iridium foil

geskiedenis

Ontdek deurS.Tenant, A.F.Fourcory, L.N.Vauquelin, H.V.Collet-Descoltils
ligging van ontdekkingEngland/France
ontdekkingsdatum1804
etimologieLatin: iris (rainbow).
uitspraaki-RID-i-em (Engels)

source

Abundance
Abundance in Earth's crust
0,001 mg/kg
natural abundance (oseaan)
natural abundance (human body)
natural abundance (Meteoroïde)
0,000054 %
natural abundance (Son)
0,0000002 %
Abundance in Universe
0,0000002 %

Nuclear Screening Constants

1s1.4881
2p4.4624
2s20.1102
3d13.514
3p21.9311
3s22.7942
4d37.2628
4f38.6552
4p35.086
4s34.152
5d58.304
5p53.339
5s51.1545
6s66.4334