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Technical data for Platinum

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Overview
NamePlatinum
SymbolPt
Atomic Number78
Atomic Weight195.078
Density21.09 g/cm3
Melting Point1768.3 °C
Boiling Point3825 °C

Thermal properties
PhaseSolid
Melting Point1768.3 °C
Boiling Point3825 °C
Absolute Melting Point2041.4 K
Absolute Boiling Point4098 K
Critical PressureN/A
Critical TemperatureN/A
Heat of Fusion20 kJ/mol
Heat of Vaporization490 kJ/mol
Heat of CombustionN/A
Specific Heat133 J/(kg K)[note]
Adiabatic IndexN/A
Neel PointN/A
Thermal Conductivity72 W/(m K)
Thermal Expansion8.8×10-6 K-1

Bulk physical properties
Density21.09 g/cm3
Density (Liquid)19.77 g/cm3
Molar Volume9.2498×10-6
Brinell Hardness392 MPa
Mohs Hardness3.5 MPa
Vickers Hardness549 MPa
Bulk Modulus230 GPa
Shear Modulus61 GPa
Young Modulus168 GPa
Poisson Ratio0.38
Refractive IndexN/A
Speed of Sound2680 m/s
Thermal Conductivity72 W/(m K)
Thermal Expansion8.8×10-6 K-1

Reactivity
Valence6
Electronegativity2.28
ElectronAffinity205.3 kJ/mol
Ionization Energies
870, 1791 kJ/mol

Health and Safety
Autoignition PointN/A
FlashpointN/A
Heat of CombustionN/A
DOT Hazard Class4.1
DOT Numbers3089
EU NumberN/A
NFPA Fire Rating2
NFPA HazardsN/A
NFPA Health Rating1
NFPA Reactivity Rating0
RTECS NumberRTECSTP2160000
NFPA LabelNFPA Label

Classifications
Alternate NamesNone
Names of AllotropesNone
Blockd
Group10
Period6
Electron Configuration[Xe]4f145d96s1
ColorGray
Discovery
1735 in Peru
Gas phaseN/A
CAS NumberCAS7440-06-4
CID NumberCID23939
Gmelin NumberN/A
NSC NumberN/A
RTECS NumberRTECSTP2160000

Electrical properties
Electrical TypeConductor
Electrical Conductivity9.4×106 S/m
Resistivity1.1×10-7 m Ω
Superconducting PointN/A

Magnetic properties
Magnetic TypeParamagnetic
Curie PointN/A
Mass Magnetic Susceptibility1.22×10-8
Molar Magnetic Susceptibility2.38×10-9
Volume Magnetic Susceptibility0.0002573

Abundances
% in Universe5×10-7%
% in Sun9×10-7%
% in Meteorites0.000098%
% in Earth's Crust3.7×10-6%
% in OceansN/A
% in HumansN/A

Atomic dimensions and structure
Atomic Radius177 pm
Covalent Radius128 pm
Van der Waals Radius175 pm
Crystal StructureFace Centered Cubic
Lattice Angles
π/2, π/2, π/2
Lattice Constants
392.42, 392.42, 392.42 pm
Space Group NameFm_ 3m
Space Group Number225

Nuclear Properties
Half-LifeStable
LifetimeStable
Decay ModeN/A
Quantum Numbers3D3
Neutron Cross Section10
Neutron Mass Absorption0.002
Known Isotopes
166Pt, 167Pt, 168Pt, 169Pt, 170Pt, 171Pt, 172Pt, 173Pt, 174Pt, 175Pt, 176Pt, 177Pt, 178Pt, 179Pt, 180Pt, 181Pt, 182Pt, 183Pt, 184Pt, 185Pt, 186Pt, 187Pt, 188Pt, 189Pt, 190Pt, 191Pt, 192Pt, 193Pt, 194Pt, 195Pt, 196Pt, 197Pt, 198Pt, 199Pt, 200Pt, 201Pt, 202Pt
Stable Isotopes
192Pt, 194Pt, 195Pt, 196Pt, 198Pt
Isotopic Abundances
190Pt0.014%
192Pt0.782%
194Pt32.967%
195Pt33.832%
196Pt25.242%
198Pt7.163%


Notes on the properties of Platinum:

Specific Heat: Value given for solid phase.

Up to date, curated data provided by
Mathematica's ElementData function from Wolfram Research, Inc.

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