Crystal field theory makes predictions about how a transition metal ion’s structure is affected by the other atoms surrounding it. Rubies are mainly made up of the mineral corundum, which is ...

As bioinorganic chemists focus more on the roles of metal ions in cells and whole organisms ... a systematic view of the dynamic metabolism of transition metals.” They then highlight some ...

The colors of rubies and emeralds are so striking that they define shades of red and green—ruby red and emerald green. But ...