title: Kainotropite
text: # Kainotropite
  
  Kainotropite is a rare vanadate mineral with the formula $Cu_4FeO_2(V_2O_7)(VO_4).$ It contains trivalent iron. It is one of many fumarolic minerals discovered on the Tolbachik volcano. The name of its parental fumarole is "Yadovitaya", which means poisonous.
  
  ## Relation to other minerals
  
  Structure of kainotropite is unique. However, there are other minerals containing both copper and divanadate group, like engelhauptite and volborthite.
  
  