Bartonite is a term that primarily refers to a specific mineral, named after the locality where it was first discovered in Barton, England. It is a complex silicate mineral with a chemical formula of (Fe2+,Ca)2[(Fe2+,Ca)8(Cr,Ti)2Si4O22], belonging to the amphibole group. Bartonite typically occurs in metamorphic rocks, particularly in those associated with high-pressure and low-temperature conditions.
In terms of its physical properties, bartonite exhibits a prismatic crystal habit, often forming elongated and columnar structures. Its color ranges from dark green to brown and black, commonly displaying a vitreous luster. The mineral has a hardness of approximately 6 on the Mohs scale, indicating moderate scratch resistance. Bartonite possesses a characteristic streak that is slightly brownish-green.
Due to its limited occurrence and restricted distribution, bartonite is not widely recognized among the general population. It primarily serves as an object of interest for collectors, researchers, and geologists studying regional geology and mineralogy. The mineral's unique combination of chemical composition and crystal structure contributes to its significance in understanding geological processes and the formation of metamorphic rocks.
In summary, bartonite is a mineral belonging to the amphibole group, primarily found in metamorphic rocks. It is named after its discovery locality in Barton, England and possesses distinct physical properties, including prismatic crystals, a range of colors, and moderate hardness.
