Scorodite is a mineral that belongs to the arsenate group of minerals. Its chemical formula is Fe3+AsO4·2H2O, which means it contains iron, arsenic, oxygen, and water molecules. It commonly occurs as a secondary mineral in oxidized iron ore deposits, particularly in association with other arsenic-rich minerals.
The name "scorodite" originates from the Greek words "skorodion," meaning garlic, and "lithos," meaning stone, due to its characteristic garlic-like odor when heated. This mineral is typically found in yellow, green, or brownish colors. Its crystal structure consists of long prismatic or pyramidal prisms, often exhibiting striations on the prism faces.
Scorodite has a Mohs hardness of 3.5-4, making it a relatively soft mineral. It is also non-radioactive and has a specific gravity of around 3.2. When observed under a microscope, it shows a vitreous luster and can be either transparent or translucent.
This mineral is of interest to mineral collectors and scientists due to its associations with valuable minerals and its potential as an environmental concern. Scorodite can form as a result of acid mine drainage, where iron sulfide minerals are exposed to air and water, leading to the release of arsenic and the subsequent formation of scorodite. Because scorodite is a stable mineral in neutral to alkaline conditions, it can act as a natural trap for arsenic, potentially helping to mitigate the environmental impact of mining activities.
In summary, scorodite is an iron and arsenic-rich mineral that occurs as a secondary mineral in oxidized iron ore deposits. It has a distinct odor, various colors, and forms long prismatic
