Atomic Weights and Isotopic Compositions for Zirconium
 Isotope   Relative
Atomic Mass
 
   Isotopic
  Composition  
Standard
Atomic Weight
 
 Notes 
 
40 Zr 90   89.904 6977(20)   0.5145(40)    91.224(2) g
91   90.905 6396(20)   0.1122(5)
92   91.905 0347(20)   0.1715(8)
94   93.906 3108(20)   0.1738(28)
96   95.908 2714(21)   0.0280(9)

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