Vivianite, named after the English mineralogist J G Vivian who discovered the mineral in Cornwall, England, is a rare mineral of secondary origin, associated with pyrite in copper and tin veins. It forms as a weathering product from primary iron- manganesephosphates in pegmatites, and is a hydrous phosphate of iron of a blue to green colour, growing darker on exposure to the air. It occurs in monoclinic crystals, also fibrous, massive, and earthy. It is also found in beds of clay and has a relative hardness of 1.5 to 2. Vivianite was confirmed as a distinct species of mineral in 1817. Research Vivianite
The Probert Encyclopaedia was designed, edited and programed by
Matt and Leela Probert
Abbreviations
Research Vivianite
