Minéraux fluorescents

 

La fluorescence rouge de la calcite est certainement due à la présence d'une petite quantité de manganèse et de plomb qui agissent comme activateur et co-activateur. La fluorescence verte de l'aragonite provient d'un activateur inconnu à l'état de traces infinitésimales.

The calcite matrix fluoresces red which is probably due to the presence of small amounts of manganese (activator) and traces of lead (co-activator).The whitish green fluorescence of the aragonite needles cannot be easily explained. Most likely some trace atoms in the crystal structure are acting as activators.

ARAGONITE on CALCITE, Jemelle, Namur, Belgium. L 4 cm
UV courts / short-wave UV
collection Albert Vercammen, photographie © Axel Emmermann
Courtesy of the
MKA (Mineralogische Kring Antwerpen)