VEM Vacuum Engineering and Materials



  • Chemical Symbol: Rh
  • Atomic Number: 45
  • Atomic Weight: 102.91
  • Density: 12.41 g·cm−3
  • Melting Point: 2237 K
  • Boiling Point: 3968 K
  • Heat of Fusion: 26.59 kJ·mol−1
  • Heat of Vaporization: 494 kJ·mol−1
  • Molecular Heat Capacity: 24.98 J·mol−1·K−1
  • Electrical Resistivity: (0 °C) 43.3 nΩ·m
  • Thermal Conductivity: 150 W·m−1·K−1
  • Thermal Expansion: (25 °C) 8.2 µm·m−1·K−1




The photonics industry is one of the fastest growing segments of the high technology industry. Photonics covers a huge breadth of rapidly expanding industries throughout the world. From fiber optic communications to photonic computing, VEM is working with companies to create innovative new technology. Our semiconductors and thin film solutions are world class and will help you keep pace with this fast paced industry. Whether you’re in optical communications or optical coatings, we provide a breadth of materials to meet your needs.

Our components include: