Strontium • Alkaline Earth Metal

Primary XPS region: Sr3d
Overlapping regions: P2s
Binding energies of common chemical states:

Chemical stateBinding energy Sr3d5/2
SrO132.9 eV
SrCO3133.4 eV
SrTiO3133.1 eV

 

Experimental information

  • Sr3p1/2 overlaps C1s region.

 

Interpretation of XPS spectra

  • Sr3d region has well-resolved spin-orbit components (Δ=1.76eV, ratio=0.690).
    • When multiple chemical states are present, apparent resolution of these two spin-orbit components is reduced (compare Sr zirconate with SrO/SrCO3 spectra below).

 

Sr3d Spectrum Sr Carbonate on Sr Oxide
Strontium • Alkaline Earth Metal

General comments

  • Sr metal reacts very readily with air to form its oxide, SrO.
    • SrO reacts with atmospheric CO2 to make SrCO3.
  • Strontium oxide is used in cathodic materials for solid oxide fuel cells.

 

Element Crystal cub

About this element

Symbol: Sr
Date of discovery: 1790
Name origin: Strontian, Scotland
Appearance: silver-white
Discoverer: Adair Crawford
Obtained from: celestite, strontianite

Melting point: 1050 K
Boiling point: 1655 K
Density[kg/m3]: 2630
Molar volume: 33.94 × 10-6 m3/mol
Protons/Electrons: 38
Neutrons: 50
Shell structure: 2,8,18,8,2
Electron configuration: [Kr]5s2
Oxidation state: 2
Crystal structure: cubic

A soft, silvery element that tarnishes in air, strontium is commonly found in nature combined with other compounds, but never as the free element. Strontium reacts vigorously with water and its salts ignite spontaneously in air, imparting a brilliant crimson color often sought after in pyrotechnics. Strontium exists in three allotropic forms with at least 16 stable isotopes. With a half-life of 29 years, 90Sr is one of the best long-lived high-energy beta emitters known. It holds promise for applications in space vehicles and remote weather stations, in which a long-lived, lightweight, nuclear, electric power source is needed.

 

Products

Nexsa G2 XPS

  • Micro-focus X-ray sources
  • Unique multi-technique options
  • Dual-mode ion source for monoatomic & cluster ion depth profiling

 Download datasheet

Style Sheet for Instrument Cards Original

K-Alpha XPS

  • High resolution XPS
  • Fast, efficient, automated workflow
  • Ion source for depth profiling

 Download brochure

ESCALAB QXi XPS

  • High spectral resolution
  • Multi-technique surface analysis
  • Extensive sample preparation and expansion options

 Download brochure

Documents

Application notes


Contact us

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.

Electron microscopy support and resources