Tags: Chemical Substance, Mineral.
Pinnoite is a magnesium borate mineral with formula: MgB2O(OH)6 or MgB2O4·3(H2O). It crystallizes in the tetragonal crystal system and occurs as colorless to yellow or light green radial fibrous clusters and rarely as short prismatic crystals.Pinnoite was first described in 1884 for an occurrence in the Stassfurt potash deposit Saxony-Anhalt Germany and named for the mine counselor Oberbergrat Pinno of Halle Germany.
