Arakiite (IMA symbol: Ark) is a rare mineral with the formula (Zn,Mn<sup>2+</sup>)(Mn<sup>2+</sup>,Mg)<sub>12</sub>(Fe<sup>3+</sup>,Al)<sub>2</sub>(As<sup>3+</sup>O<sub>3</sub>)(As<sup>5+</sup>O<sub>4</sub>)<sub>2</sub>(OH)<sub>23</sub>. It is both arsenate and arsenite mineral, a combination that is rare in the world of minerals. Arakiite is stoichiometrically similar to hematolite. It is one of many rare minerals coming from the famous LÃÂ¥ngban manganese skarn deposit in Sweden. Other minerals bearing both arsenite and zinc include kraisslite and mcgovernite.
The mineral crystallizes in the monoclinic crystal system in space group Cc.