NIST Physical Measurement Laboratory Handbook of Basic Atomic Spectroscopic Data

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Atomic Data for Osmium (Os)

Atomic Number = 76

Atomic Weight = 190.2

Reference E95


Isotope    Mass        Abundance Spin Mag Moment

184Os      183.952488  0.02%     0    
186Os      185.953830  1.58%     0    
187Os      186.955741  1.6%      1/2  +0.0646
188Os      187.955860  13.3%     0    
189Os      188.958137  16.1%     3/2  +0.6599
190Os      189.958436  26.4%     0    
192Os      191.961476  41.0%     0    

 
Os I  Ground State 1s22s22p63s23p63d104s24p64d104f145s25p65d66s2  5D4
      Ionization energy  68058.9 cm-1 (8.43823 eV)   Ref. CLS97
 
Os II Ground State 1s22s22p63s23p63d104s24p64d104f145s25p65d66s  6D9/2