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| General
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| Name, Symbol, Number
| Hafnium, Hf, 72
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| Chemical series
| Transition metals
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| Group, Period, Block
| 4 (IVB), 6 , dThe d-block of the periodic table of elements consists of those periodic table groups that contain elements in which, in the atomic ground state, the highest-energy electron is in a d- orbital. The d-block elements are often also known as transition metal
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| DensityFor other meanings of density, see density (disambiguation Density (symbol: rho Greek: rho) is a measure of mass per unit of volume. The higher an object's density, the higher its mass per volume. The average density of an object equals its total mass div, Hardness
| 13310 kg/m3Kilogram per cubic metre is the SI measure of density and is represented as kg/m³, where kg stands for kilogram and m³ stands for cubic metre. The density of water is about 1000 kg/m³, since a cubic metre of water weighs about a tonne. kg/m³" is sometimes, 5.5
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| AppearanceFor alternative meanings, see color (disambiguation). visual arts. Color (or colour is a sensation which (in humans) derives from the ability of the fine structure of the eye to distinguish three differently filtered analyses of a view. The perception of
| grey steel
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| Atomic Properties
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| Atomic weightIn reference to a certain isotope of a chemical element, atomic weight (more accurately relative atomic mass though also called simply atomic mass is the mass of one atom of the isotope expressed in units atomic mass unit amu) such that the Carbon-12 isot
| 178.49 amuThe atomic mass unit amu , unified atomic mass unit u , or dalton Da , is a small unit of mass used to express atomic masses and molecular masses. It is defined to be 1/12 of the mass of one atom of Carbon-12. Accordingly, :1 u 1/N gram 1/(1000 N) kg (whe
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| Atomic radiusAtomic radius is the distance from the atomic nucleus to the outmost stable electron orbital in a atom that is at equilibrium and is measured in picometers or Angstroms. Atomic radii are called covalent radii (a reference to the types of bonds formed) whe (calc.)
| 155 (208) pm
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| Covalent radius
| 150 pm
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| van der Waals radius
| no data
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| Electron configuration
| [ Xe]4 f14 5d2 6 s2
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| e- 's per energy level
| 2, 8, 18, 32, 10, 2
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| Oxidation state ( Oxide)
| 4 ( amphoteric)
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| Crystal structure
| Hexagonal
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| Physical Properties
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| State of matter
| solid
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| Melting point
| 2506 K (4051 ° F)
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| Boiling point
| 4876 K (8317 °F)
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| Molar volume
| 13.44 ×10-6 m3/mol
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| Heat of vaporization
| 575 kJ/mol
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| Heat of fusion
| 24.06 kJ/mol
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| Vapor pressure
| 0.00112 Pa at 2500K
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| Speed of sound
| 3010 m/s at 293.15 K
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| Miscellaneous
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| Electronegativity
| 1.3 ( Pauling scale)
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| Specific heat capacity
| 140 J/(kg*K)
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| Electrical conductivity
| 3.12 106/m ohm
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| Thermal conductivity
| 23 W/(m*K)
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| 1st ionization potential
| 658.5 kJ/mol
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| 2nd ionization potential
| 1440 kJ/mol
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| Most Stable Isotopes
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| iso
| NA
| half-life
| DM
| DE M eV
| DP
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| 172Hf
| {syn.}
| 1.87 y
| ε
| 0.350
| 172Lu
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| 174Hf
| 0.162%
| 2 E15 y
| α
| 2.495
| 170Yb
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| 176Hf
| 5.206%
| Hf is stable with 104 neutrons
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| 177Hf
| 18.606%
| Hf is stable with 105 neutrons
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| 178Hf
| 27.297%
| Hf is stable with 106 neutrons
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| 179Hf
| 13.629%
| Hf is stable with 107 neutrons
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| 180Hf
| 35.1%
| Hf is stable with 108 neutrons
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| 182Hf
| {syn}
| 9 E6 y
| β
| 0.373
| 182Ta
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| SI units & STP are used except where noted.
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