Search Thermo Fisher Scientific
table of Elements
Hafnium
Hafnium X-ray photoelectron spectra, hafnium electron configuration, and other elemental information.
Hafnium • Transition Metal
Primary XPS region: Hf4f
Overlapping regions: O2s
Binding energies of common chemical states:
| Chemical state | Binding energy Hf4f7/2 |
|---|---|
| Hf metal | 14.3 eV |
| HfO2 | 18.3 eV |
Experimental information
- If analyzing nitrided hafnium oxide or silicate, collect entire Hf4p region (up to 490eV), making sure both Hf4p3/2 and Hf4p1/2 components are acquired.
- This will give the best opportunity to deconvolve the true N1s signal from the overlapping plasmon loss feature of the Hf4p1/2 peak.
Interpretation of XPS spectra
- The weak Hf4s directly overlaps the O1s region.
- The plasmon loss feature from the Hf4p1/2 peaks directly overlaps the N1s region. Caution must be used when peak fitting the N1s region in nitride hafnium oxide/silicate samples.
- Hf4f region has well separated spin-orbit components (Δ=1.68eV)
- Loss feature for Hf metal appears at 30eV and 23.5eV for HfO2.
- Peaks in the Hf4f region have an asymmetric peak shape for hafnium metal.
- Hafnium compounds, such as the oxide, have symmetric Hf4f peaks.
General comments
- Hafnium oxide is reduced by an argon ion beam to form a continuum of oxidation states.
- Use lowest beam energy possible for profiling or cluster source to clean top surface.
About this element
Symbol: Hf
Date of discovery: 1923
Name origin: Latin Hafnia
Appearance: silver
Discoverer: Dirk Coster, George von Hevesy
Obtained from: zircon
Melting point: 2423 K
Boiling point: 5673 K
Density[kg/m3]: 13310
Molar volume: 13.44 × 10-6 m3/mol
Protons/Electrons: 72
Neutrons: 106
Shell structure: 2,8,18,32,10,2
Electron configuration: [Xe]4f145d26s2
Oxidation state: 4
Crystal structure: hexagonal
While using X-ray spectroscopy to study the arrangements of the outer electrons within atoms in samples of zirconium ore, D. Coster and G. von Hevesy discovered the element hafnium and were also able to predict the electron structure of the element. Hafnium, a lustrous, silverish gray tetravalent transition metal, has many characteristics similar to that of zirconium. Half of all hafnium metal produced is through a by-product of zirconium refinement. While found in natural zirconium compounds, hafnium does not exist as a free element in nature. Because hafnium is a good absorber of neutrons, has superb mechanical and corrosion resistance properties, it is used to make nuclear control rods, such as those used in nuclear submarines.
Products
Style Sheet for Instrument Cards Original
Style Sheet for Global Design System
Style Sheet for Komodo Tabs
Style Sheet to change H3 to p with em-h3-header class
Style Sheet to change H2 style to p with em-h2-header class
Style Sheet for Products Table Specifications
Style Sheet for Global Design System
Style Sheet for Komodo Tabs
Style Sheet to change H3 to p with em-h3-header class
Style Sheet to change H2 style to p with em-h2-header class
Style Sheet for Products Table Specifications
Fix for left nav
Style Sheet for Support and Service footer
Style Sheet for Fonts
Style Sheet for Cards
Electron microscopy services for
the materials science
To ensure optimal system performance, we provide you access to a world-class network of field service experts, technical support, and certified spare parts.
