Londonoite

Londonoite is a mineral discovered in 1997 at the San Lorenzo mine in La Cordillera, Antioquia, Colombia. It is a bismuth telluride with the chemical formula Bi2Te2S. The mineral is named after the city of London, Ontario, Canada, where the initial mineralogical studies were conducted. Londonoite is known for its metallic luster and an unusual association of elements. It crystallizes in the trigonal crystal system. It is typically found in association with other telluride minerals such as altaite and tetradymite. The discovery of londonoite contributed to the understanding of complex bismuth-containing mineral systems. Its geological occurrence is relatively rare, making it of interest to mineral collectors and researchers studying the geochemistry of telluride deposits. The specific conditions under which londonoite forms are thought to involve hydrothermal processes. Further research continues to explore its physical and chemical properties.