Iyoite
Iyoite is a very rare manganese copper chloride hydroxide mineral with the formula MnCuCl3. Iyoite is a new member of the atacamite group, and it an analogue of botallackite characterized in manganese and copper ordering. Iyoite is monoclinic. It is chemically similar to misakiite. Both minerals come from the Ohku mine in the Ehime prefecture, Japan.