99Ru Isotope Information and Examples of Enriched 99Ru Applications:

Ruthenium-99 isotope (Ru-99 isotope, 99Ru isotope)

  • 99Ru isotope is used for Mössbauer studies;

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99Ru metal Safety Data Sheet (SDS) - Download pdf file
Download 99Ru metal SDS

Properties Of 99Ru Isotope:

Property99Ru
Neutron Number (N)55
Atomic Number / Proton Number (Z)44
Mass Number / Nucleon Number (A)99
Natural Abundance (%)0.1276
Atomic Mass (Da)98.905934
Relative Isotopic Mass98.905934
Spin2.5
Quadrupole Moment0.079
g-factor (g value)-0.256
Half-life
Group8
Period5
Electron Configuration Blockd
Melting Point (K)2583
Boiling Point (K)4173
Specific Heat0.238
Heat of Formation650.6
Thermal Conductivity117
Dipole Polarizability 72
Electron Affinity (kJ/mole)1.05
Electronegativity (Pauling scale)2.2
Atomic Radius (pm)134
Covalent Radius (pm)130
VDW Radius (pm)234
Lattice Constant2.7
Crystal StructureHEX
Jmol color#248f8f

Ruthenium Information

Hard white metallic transition element. Found with platinum, used as a catalyst in some platinum alloys. Dissolves in fused alkalis, and is not attacked by acids. Reacts with halogens and oxygen at high temperatures. Isolated in 1844 by K.K. Klaus.

Used to harden platinum and palladium. Aircraft magnetos use platinum alloy with 10% ruthenium.

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