ANDREW LAMBERT PHOTOGRAPHY / SCIENCE PHOTO LIBRARY ANDREW LAMBERT PHOTOGRAPHY / SCIENCE PHOTO LIBRARY
Manganese compounds on watchglasses. The colours and appearance show the difference in oxidation state of the manganese in potassium manganate (VII) (KMnO4, lower left), manganese (IV) oxide (MnO2, upper centre), and manganese (II) sulphate (MnSO4, lower right).
Model release not required. Property release not required.