Osmium Element Properties

Osmium

d75
Re
Rhenium
d76
Os
Osmium
d77
Ir
Iridium
General
Name(Osmium)
Symbol(Os)
Number(76)
Group Number(8)
Group(Transition metals)
Block(d)
Density(22.40 g/cm3)
Atomic Weight(190.2 g/mol)
Atomic Volume(8.49 cm3/mol)
Discover(1804)


States
State(Solid)
Melting Point(3306 K)
Boiling Point(5285 K)
Triple Point(Nil)
Critical Point(Nil)
Heat of Fusion(57.85 kJ/mol)
Heat of Vaporization(738 kJ/mol)


Energies
First Ionization Energy(840 kJ/mole)
Second Ionization Energy(Nil)
Third Ionization Energy(Nil)
Electronegativity(2.2)
Electron Affinity(110 kJ/mole)
Specific Heat(0.13 J/gK)
Heat Atomization(791 kJ/mole atoms)


Oxidation and Electrons
Shells(2,8,18,32,14,2)
Electron Configuration([Xe] 4f14 5d6 6s2)
Minimum Oxidation Number(-2)
Maximum Oxidation Number(8)
Minimum Common Oxidation Number(0)
Maximum Common Oxidation Number(4)


Appearance and Characteristics
Crystal Structure(hexagonal)
Characteristics(hard, dense, inert <100 C)
Color(bluish-white)
Uses(hard alloys,phono needles)
Hardness(7 mohs)
Toxicity(None)


Reactions
Reaction with Air(None)
Reaction with 6M HCl(None)
Reaction with 15M HNO3(mild, =>OsO4)
Reaction with 6M NaOH(None)


Other Forms
Number of Isotopes(7)
Hydride(None)
Oxide(OsO2 OsO4)
Chloride(OsCl3 OsCl4 OsCl5)


Radius
Atomic Radius(135 pm)
Ionic Radius (1+ ion)(Nil)
Ionic Radius (1- ion)(Nil)
Ionic Radius (2+ ion)(Nil)
Ionic Radius (2- ion)(Nil)
Ionic Radius (3+ ion)(Nil)


Conductivity
Thermal Conductivity(87.6 J/m-sec-deg)
Electrical Conductivity(105.263 1/mohm-cm)
Polarizability(8.5 A3)


Abundance
Source(nickel ores (sulfides))
Relation Abundance Solar System(-0.171 log)
Abundance Earths Crust(-2.8 log)


d75
Re
Rhenium
d76
Os
Osmium
d77
Ir
Iridium

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