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Technical data for Zinc

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Overview
NameZinc
SymbolZn
Atomic Number30
Atomic Weight65.409
Density7.14 g/cm3
Melting Point419.53 °C
Boiling Point907 °C

Thermal properties
PhaseSolid
Melting Point419.53 °C
Boiling Point907 °C
Absolute Melting Point692.68 K
Absolute Boiling Point1180 K
Critical PressureN/A
Critical TemperatureN/A
Heat of Fusion7.35 kJ/mol
Heat of Vaporization119 kJ/mol
Heat of CombustionN/A
Specific Heat388 J/(kg K)[note]
Adiabatic IndexN/A
Neel PointN/A
Thermal Conductivity120 W/(m K)
Thermal Expansion0.0000302 K-1

Bulk physical properties
Density7.14 g/cm3
Density (Liquid)6.57 g/cm3
Molar Volume9.161×10-6
Brinell Hardness412 MPa
Mohs Hardness2.5 MPa
Vickers HardnessN/A
Bulk Modulus70 GPa
Shear Modulus43 GPa
Young Modulus108 GPa
Poisson Ratio0.25
Refractive Index1.00205
Speed of Sound3.7×103 m/s
Thermal Conductivity120 W/(m K)
Thermal Expansion0.0000302 K-1

Reactivity
Valence2
Electronegativity1.65
ElectronAffinity0 kJ/mol
Ionization Energies
906.4, 1733.3, 3833, 5731, 7970, 1.04×104, 1.29×104, 1.68×104, 1.96×104, 2.3×104, 2.64×104, 29990, 40490, 4.38×104, 4.73×104, 5.23×104, 5.59×104, 5.97×104, 6.73×104, 7.12×104, 1.791×105 kJ/mol

Health and Safety
Autoignition Point460 °C
FlashpointN/A
Heat of CombustionN/A
DOT Hazard Class4.3
DOT Numbers1436
EU NumberN/A
NFPA Fire Rating0
NFPA Hazards
Water Reactive
NFPA Health Rating2
NFPA Reactivity Rating0
RTECS NumberRTECSZG8600000
NFPA LabelNFPA Label

Classifications
Alternate NamesNone
Names of AllotropesNone
Blockd
Group12
Period4
Electron Configuration[Ar]3d104s2
ColorSlateGray
Discovery
1500 in Germany
Gas phaseN/A
CAS NumberCAS7440-66-6
CID NumberCID23994
Gmelin NumberN/A
NSC NumberN/A
RTECS NumberRTECSZG8600000

Electrical properties
Electrical TypeConductor
Electrical Conductivity1.7×107 S/m
Resistivity5.9×10-8 m Ω
Superconducting Point0.85

Magnetic properties
Magnetic TypeDiamagnetic
Curie PointN/A
Mass Magnetic Susceptibility-2.21×10-9
Molar Magnetic Susceptibility-1.45×10-10
Volume Magnetic Susceptibility-0.0000158

Abundances
% in Universe0.00003%
% in Sun0.0002%
% in Meteorites0.018%
% in Earth's Crust0.0078%
% in Oceans5×10-7%
% in Humans0.0033%

Atomic dimensions and structure
Atomic Radius142 pm
Covalent Radius131 pm
Van der Waals Radius139 pm
Crystal StructureSimple Hexagonal
Lattice Angles
π/2, π/2, 2 π/3
Lattice Constants
266.49, 266.49, 494.68 pm
Space Group NameP63/mmc
Space Group Number194

Nuclear Properties
Half-LifeStable
LifetimeStable
Decay ModeN/A
Quantum Numbers1S0
Neutron Cross Section1.1
Neutron Mass Absorption0.00055
Known Isotopes
54Zn, 55Zn, 56Zn, 57Zn, 58Zn, 59Zn, 60Zn, 61Zn, 62Zn, 63Zn, 64Zn, 65Zn, 66Zn, 67Zn, 68Zn, 69Zn, 70Zn, 71Zn, 72Zn, 73Zn, 74Zn, 75Zn, 76Zn, 77Zn, 78Zn, 79Zn, 80Zn, 81Zn, 82Zn, 83Zn
Stable Isotopes
64Zn, 66Zn, 67Zn, 68Zn, 70Zn
Isotopic Abundances
64Zn48.63%
66Zn27.9%
67Zn4.1%
68Zn18.75%
70Zn0.62%


Notes on the properties of Zinc:

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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