Potassium • Alkali Metal

Primary XPS region: K2p
Overlapping regions: C1s
Binding energies of common chemical states:

Chemical stateBinding energy K2p3/2
KCl292.9 eV
KBr293.2 eV

Charge referenced to adventitious C1s peak at 284.8eV.

 

Experimental information

  • It is often quicker to acquire C1s region and extend range to 305eV to capture the K2p region.

 

Interpretation of XPS spectra

  • K2p peak has clearly spaced spin-orbit components (Δchloride=2.8eV).
     
Strong And Weak Potassium Peaks Versus Carbon
Potassium • Alkali Metal
  • Weaker K2p peaks can be easily confused with either C1s (CF2) peaks or C1s satellite structure in aromatic compounds.
    • Assignment of K2p versus C1s feature is possible by identifying spin-orbit components expected for K2p.
    • Also check for K2s peak (~378eV).

 

General comments

  • Since potassium is a highly reactive metal, it is always present as a compound, e.g., oxide.

 

Element Crystal bcc

About this element

Symbol: K
Date of discovery: 1807
Name origin: English potash
Appearance: silvery
Discoverer: Sir Humphry Davy
Obtained from: carnallite

Melting point: 336.53 K
Boiling point: 1032 K
Density[kg/m3]: 856
Molar volume: 45.94 × 10-6 m3/mol
Protons/Electrons: 19
Neutrons: 20
Shell structure: 2,8,8,1
Electron configuration: [Ar]4s1
Oxidation state: 1
Crystal structure: cubic body centered

Potassium, the second lightest metal, was discovered by Sir Humphry Davy in 1807. It reacts violently with water and can even catch fire spontaneously in water. It can be found bound to other elements in seawater and minerals, and is needed for plant growth. Potassium is commonly used in fertilizer. It is also used in gunpowder and glass, and plays a vital role in animal cells as one of the partners in the Na-K pump. K-40 decays into Ar-40 and this process is used in the dating of rocks.

 


Products

Nexsa G2 XPS

  • 微焦点 X 射线源
  • 独特的多技术选项
  • 用于单原子和簇离子深度剖析的双模式离子源
仪器卡片原件样式表

K-Alpha XPS

  • 高分辨率 XPS
  • 快速、高效、自动化的工作流程
  • 用于深度剖析的离子源

ESCALAB QXi XPS

  • 高光谱分辨率
  • 多技术表面分析
  • 丰富的样品制备和扩展选项

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
产品表格规范样式表
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
产品表格规范样式表
Fix for left nav
支持和服务页脚样式表
字体样式表
卡片样式表

用于材料科学的
电子显微镜服务

为实现理想的系统性能,我们为您提供了由现场服务专家、技术支持部门和认证备件组成的全球网络支持。