Atomic Weights and Isotopic Compositions for Iridium
 Isotope   Relative
Atomic Mass
 
   Isotopic
  Composition  
Standard
Atomic Weight
 
 Notes 
 
77 Ir 191 190.960 5893(21)   0.373(2)  192.217(3)  
193 192.962 9216(21)   0.627(2)

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