Topic summary
Coronadite
Coronadite is the leadendmember of the , a family of tectomanganates with a 2 × 2 tunnel structure, isostructural with hollandite.
The mineral was first described by Waldemar Lindgren in 1905, from an occurrence in Arizona, and was named after Francisco Vasquez de Coronado, an explorer of south-west US. It is chemically related to ferricoronadite, an Fe+3 analogue, as well as cryptomelane, hollandite, and strontiomelane.