pupilin

Pupilin is a rare and complex mineral that belongs to the group of phosphates. It was first discovered in 1975 in the Pupino mine in the Italian Alps, hence its name. The mineral is characterized by its unique crystal structure and distinctive physical properties. Pupilin is typically found in low-temperature hydrothermal veins, often associated with other phosphate minerals such as apatite and vivianite.

The chemical formula of pupilin is Ca2Mg(PO4)2 * 4H2O. This indicates that it is a hydrated calcium magnesium phosphate, with water molecules incorporated into its structure. The mineral crystallizes in the monoclinic system, forming prismatic crystals that can reach up to 1 cm in length. Pupilin is usually colorless or white, but it can also exhibit shades of yellow or green due to impurities.

Due to its rarity and the specific conditions required for its formation, pupilin is not commonly used in industrial applications. However, it is of interest to mineralogists and collectors for its unique properties and aesthetic appeal. The study of pupilin contributes to our understanding of the complex processes involved in the formation of phosphate minerals in low-temperature environments.