Atomic Weights and Isotopic Compositions for Lithium
 Isotope   Relative
Atomic Mass
 
   Isotopic
  Composition  
Standard
Atomic Weight
 
 Notes 
 
3 Li 6     6.015 122 8874(16)   0.0759(4)  [6.938, 6.997] m
7     7.016 003 4366(45)   0.9241(4)

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