doped with a small amount of potassium permanganate
chemical formula
: K(ClO4, MnO4)
crystal class
: orthorhombic bipyramidal
growing method
: slowly cooling of the aquaous solution
growing time
: app. 24 hours
crystal size
: up to 5 millimeters
Potassium perchlorate / potassium permanganate is one of the few good examples
of a crystal with mixed anions.
This little specimen was grown from about 1,500 ml solution to which only a few
small crystal pieces of potassium permanganate had been added.
As you may know the permanganate anion is one of the strongest inorganic "dyes"
known, even traces can produce a slight pinkish hue.
