Iridi

Iridi (Ir)

chemical element with symbol Ir and atomic number 77
Atomic Number77
Atomic Weight192.217
mass number193
Group9
Period6
Blockd
protoni77 p+
nyutroni116 n0
elektroni77 e-
Animated Bohr model of Ir (Iridi)

Physical Property

Atomic Radius
135 pm
molar volume
Covalent Radius
122 pm
Metallic Radius
127 pm
ionic radius
68 pm
Crystal Radius
82 pm
Van der Waals radius
213 pm
msongamano
22.5622 g/cm³
Atomic Radii Of The Elements: Iridi0102030405060708090100110120130140150160170180190200210220pmAtomic RadiusCovalent RadiusMetallic RadiusVan der Waals radius

Chemical Property

nishati
proton affinity
electron affinity
ionization energy
8.96702 eV/particle
ionization energy of Ir (Iridi)
enthalpy of vaporization
604 kJ/mol
enthalpy of fusion
27.61 kJ/mol
standard enthalpy of formation
669 kJ/mol
elektroni
Mzingo elektroni2, 8, 18, 32, 15, 2
Bohr model: Ir (Iridi)
valence electron2
Lewis structure: Ir (Iridi)
electron configuration[Xe] 4f14 5d7 6s2
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 4f14 5d7 6s2
Enhanced Bohr model of Ir (Iridi)
Orbital Diagram of Ir (Iridi)
oxidation number-3, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
electronegativity
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
Kiwango utatu
appearance
Rangi
Silver
appearancesilvery white
refractive index
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
electrical conductivity
21 MS/m
electrical resistivity
0.00000004699999999998 m Ω
superconductivity
0.11 K
Uga sumaku
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
bulk modulus
320 GPa
shear modulus
210 GPa
Young's modulus
528 GPa
Poisson's ratio
0.26
speed of sound
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
space group225 (Fm_3m)

Isotopes of Iridium

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

163Ir

mass number163
neutron number86
relative atomic mass
162.994299 ± 0.000429 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
spin1/2
nuclear quadrupole moment
0
Uvumbuzi
parity+

hali ya kuozaintensity
p (proton emission)

164Ir

mass number164
neutron number87
relative atomic mass
163.991966 ± 0.000339 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
spin2
nuclear quadrupole moment
Uvumbuzi
parity-

hali ya kuozaintensity
p (proton emission)
α (α emission)
β+ (β+ decay; β+ = ϵ + e+)

165Ir

mass number165
neutron number88
relative atomic mass
164.987552 ± 0.00017 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
spin1/2
nuclear quadrupole moment
0
Uvumbuzi
parity+

hali ya kuozaintensity
p (proton emission)
α (α emission)

166Ir

mass number166
neutron number89
relative atomic mass
165.985716 ± 0.000215 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
10.5 ± 2.2 ms
spin2
nuclear quadrupole moment
Uvumbuzi1981
parity

hali ya kuozaintensity
α (α emission)93%
p (proton emission)7%

167Ir

mass number167
neutron number90
relative atomic mass
166.981671973 ± 0.000019694 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
29.3 ± 0.6 ms
spin1/2
nuclear quadrupole moment
0
Uvumbuzi1981
parity+

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

168Ir

mass number168
neutron number91
relative atomic mass
167.979960978 ± 0.000059277 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
230 ± 50 ms
spin2
nuclear quadrupole moment
Uvumbuzi1978
parity

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

169Ir

mass number169
neutron number92
relative atomic mass
168.976281743 ± 0.00002502 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
353 ± 4 ms
spin1/2
nuclear quadrupole moment
0
Uvumbuzi1978
parity+

hali ya kuozaintensity
α (α emission)53%
β+ (β+ decay; β+ = ϵ + e+)

170Ir

mass number170
neutron number93
relative atomic mass
169.975113 ± 0.000109 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
910 ± 150 ms
spin3
nuclear quadrupole moment
Uvumbuzi1977
parity-

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)
α (α emission)5.2%

171Ir

mass number171
neutron number94
relative atomic mass
170.97164552 ± 0.000041295 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
3.1 ± 0.3 s
spin1/2
nuclear quadrupole moment
0
Uvumbuzi1967
parity+

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)
α (α emission)15%

172Ir

mass number172
neutron number95
relative atomic mass
171.970607035 ± 0.000034785 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
4.4 ± 0.3 s
spin3
nuclear quadrupole moment
Uvumbuzi1967
parity-

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)98%
α (α emission)2%

173Ir

mass number173
neutron number96
relative atomic mass
172.967505477 ± 0.000011316 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
9 ± 0.8 s
spin1/2
nuclear quadrupole moment
0
Uvumbuzi1967
parity+

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)96.5%
α (α emission)3.5%

174Ir

mass number174
neutron number97
relative atomic mass
173.966949939 ± 0.000012046 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
7.9 ± 0.6 s
spin2
nuclear quadrupole moment
Uvumbuzi1967
parity+

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)99.5%
α (α emission)0.5%

175Ir

mass number175
neutron number98
relative atomic mass
174.964149519 ± 0.000013295 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
9 ± 2 s
spin1/2
nuclear quadrupole moment
0
Uvumbuzi1967
parity+

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)99.15%
α (α emission)0.85%

176Ir

mass number176
neutron number99
relative atomic mass
175.963626261 ± 0.000008679 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
8.7 ± 0.5 s
spin3
nuclear quadrupole moment
Uvumbuzi1967
parity+

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)96.9%
α (α emission)3.1%

177Ir

mass number177
neutron number100
relative atomic mass
176.9613015 ± 0.000021213 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
29.8 ± 1.7 s
spin5/2
nuclear quadrupole moment
Uvumbuzi1967
parity-

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)100%
α (α emission)0.06%

178Ir

mass number178
neutron number101
relative atomic mass
177.961079395 ± 0.000020204 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
12 ± 2 s
spin3
nuclear quadrupole moment
Uvumbuzi1972
parity+

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)100%

179Ir

mass number179
neutron number102
relative atomic mass
178.959117594 ± 0.000010489 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
79 ± 1 s
spin5/2
nuclear quadrupole moment
Uvumbuzi1992
parity

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)100%

180Ir

mass number180
neutron number103
relative atomic mass
179.959229446 ± 0.000023302 Da
g-factor
0.5 ± 0.04
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
1.5 ± 0.1 m
spin5
nuclear quadrupole moment
Uvumbuzi1972
parity+

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)100%

181Ir

mass number181
neutron number104
relative atomic mass
180.957634691 ± 0.000005631 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
4.9 ± 0.15 m
spin5/2
nuclear quadrupole moment
Uvumbuzi1972
parity-

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)100%

182Ir

mass number182
neutron number105
relative atomic mass
181.958076296 ± 0.000022509 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
15 ± 1 m
spin3
nuclear quadrupole moment
Uvumbuzi1961
parity+

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)100%

183Ir

mass number183
neutron number106
relative atomic mass
182.956841231 ± 0.000026486 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
58 ± 5 m
spin5/2
nuclear quadrupole moment
Uvumbuzi1961
parity-

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)100%
α (α emission)

184Ir

mass number184
neutron number107
relative atomic mass
183.957476 ± 0.00003 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
3.09 ± 0.03 h
spin5
nuclear quadrupole moment
2.41 ± 0.03
Uvumbuzi1960
parity-

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)100%

185Ir

mass number185
neutron number108
relative atomic mass
184.956698 ± 0.00003 Da
g-factor
1.0384 ± 0.0052
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
14.4 ± 0.1 h
spin5/2
nuclear quadrupole moment
Uvumbuzi1958
parity-

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)100%

186Ir

mass number186
neutron number109
relative atomic mass
185.957946754 ± 0.00001774 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
16.64 ± 0.03 h
spin5
nuclear quadrupole moment
-2.55 ± 0.03
Uvumbuzi1958
parity+

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)100%

187Ir

mass number187
neutron number110
relative atomic mass
186.957542 ± 0.00003 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
10.5 ± 0.3 h
spin3/2
nuclear quadrupole moment
0.941 ± 0.011
Uvumbuzi1958
parity+

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)100%

188Ir

mass number188
neutron number111
relative atomic mass
187.958834999 ± 0.000010116 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
41.5 ± 0.5 h
spin1
nuclear quadrupole moment
0.484 ± 0.006
Uvumbuzi1950
parity-

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)100%

189Ir

mass number189
neutron number112
relative atomic mass
188.958722602 ± 0.0000135 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
13.2 ± 0.1 d
spin3/2
nuclear quadrupole moment
Uvumbuzi1955
parity+

hali ya kuozaintensity
ϵ (electron capture)100%

190Ir

mass number190
neutron number113
relative atomic mass
189.960543374 ± 0.00000147 Da
g-factor
0.01 ± 0.0025
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
11.78 ± 0.1 d
spin4
nuclear quadrupole moment
2.87 ± 0.16
Uvumbuzi1947
parity-

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)100%
e+ (positron emission)0.002%

191Ir

mass number191
neutron number114
relative atomic mass
190.960591455 ± 0.000001406 Da
g-factor
0.10013333333333 ± 0.0004
natural abundance
37.3 ± 0.2
Unururifustable isotope
NusumaishaNot Radioactive ☢️
spin3/2
nuclear quadrupole moment
0.816 ± 0.009
Uvumbuzi1935
parity+

192Ir

mass number192
neutron number115
relative atomic mass
191.962602414 ± 0.00000141 Da
g-factor
0.47925 ± 0.0025
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
73.82 ± 0.014 d
spin4
nuclear quadrupole moment
2.15 ± 0.06
Uvumbuzi1937
parity+

hali ya kuozaintensity
β (β decay)95.24%
ϵ (electron capture)4.76%

193Ir

mass number193
neutron number116
relative atomic mass
192.962923753 ± 0.000001425 Da
g-factor
0.10866666666667 ± 0.0004
natural abundance
62.7 ± 0.2
Unururifustable isotope
NusumaishaNot Radioactive ☢️
spin3/2
nuclear quadrupole moment
0.751 ± 0.009
Uvumbuzi1935
parity+

194Ir

mass number194
neutron number117
relative atomic mass
193.965075703 ± 0.000001429 Da
g-factor
0.39 ± 0.01
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
19.35 ± 0.07 h
spin1
nuclear quadrupole moment
0.339 ± 0.012
Uvumbuzi1937
parity-

hali ya kuozaintensity
β (β decay)100%

195Ir

mass number195
neutron number118
relative atomic mass
194.965976898 ± 0.000001431 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
2.29 ± 0.17 h
spin3/2
nuclear quadrupole moment
Uvumbuzi1952
parity+

hali ya kuozaintensity
β (β decay)100%

196Ir

mass number196
neutron number119
relative atomic mass
195.968399669 ± 0.000041239 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
52 ± 1.1 s
spin1
nuclear quadrupole moment
Uvumbuzi1966
parity

hali ya kuozaintensity
β (β decay)100%

197Ir

mass number197
neutron number120
relative atomic mass
196.969657217 ± 0.000021588 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
5.8 ± 0.5 m
spin3/2
nuclear quadrupole moment
Uvumbuzi1952
parity+

hali ya kuozaintensity
β (β decay)100%

198Ir

mass number198
neutron number121
relative atomic mass
197.972399 ± 0.000215 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
8.7 ± 0.4 s
spin1
nuclear quadrupole moment
Uvumbuzi1973
parity-

hali ya kuozaintensity
β (β decay)100%

199Ir

mass number199
neutron number122
relative atomic mass
198.973807097 ± 0.000044073 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
7 ± 5 s
spin3/2
nuclear quadrupole moment
Uvumbuzi1993
parity+

hali ya kuozaintensity
β (β decay)100%

200Ir

mass number200
neutron number123
relative atomic mass
199.976844 ± 0.00021 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
43 ± 6 s
spin2
nuclear quadrupole moment
Uvumbuzi2008
parity-

hali ya kuozaintensity
β (β decay)100%
β n (β-delayed neutron emission)

201Ir

mass number201
neutron number124
relative atomic mass
200.978701 ± 0.000215 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
21 ± 5 s
spin3/2
nuclear quadrupole moment
Uvumbuzi2008
parity+

hali ya kuozaintensity
β (β decay)100%

202Ir

mass number202
neutron number125
relative atomic mass
201.982136 ± 0.000322 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
11 ± 3 s
spin2
nuclear quadrupole moment
Uvumbuzi2008
parity-

hali ya kuozaintensity
β (β decay)100%

203Ir

mass number203
neutron number126
relative atomic mass
202.984573 ± 0.000429 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
spin3/2
nuclear quadrupole moment
Uvumbuzi2009
parity+

hali ya kuozaintensity
β (β decay)

204Ir

mass number204
neutron number127
relative atomic mass
203.989726 ± 0.000429 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
spin
nuclear quadrupole moment
Uvumbuzi2011
parity

hali ya kuozaintensity
β (β decay)
β n (β-delayed neutron emission)

205Ir

mass number205
neutron number128
relative atomic mass
204.993988 ± 0.000537 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
spin3/2
nuclear quadrupole moment
Uvumbuzi2012
parity+

hali ya kuozaintensity
β (β decay)
β n (β-delayed neutron emission)
Iridium foil

historia

mgunduzi au mvumbuziS.Tenant, A.F.Fourcory, L.N.Vauquelin, H.V.Collet-Descoltils
location of discoveryEngland/France
Uvumbuzi1804
EtimolojiaLatin: iris (rainbow).
pronunciationi-RID-i-em (Kiingereza)

source

Abundance
Abundance in Earth's crust
0.001 mg/kg
natural abundance (Bahari)
natural abundance (Mwili)
natural abundance (Kimondo)
0.000054 %
natural abundance (Jua)
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