Loading...
  • Hafnium
  • Lutetium-hafnium ages that are based on the previously used λ 176 Lu of 1.93 × 10 −11 to 1.94 × 10 −11 year −1 are thus ∼4% too young, and the initial hafnium isotope compositions of some of Earth's oldest minerals and rocks become less radiogenic relative to bulk undifferentiated Earth when calculated using the new decay constant. (sciencemag.org)