Home / Explore / Minerals / Koktaite Minerals Koktaite koktaite (NH4)2Ca(SO4)2 * H2O Koktaite Mineral Specimen For Sale — via www.dakotamatrix.com · Source Overview Koktaite is a mineral species (sulfate mineral). It crystallises in the monoclinic system. Nickel–Strunz class: 7.CD.35. Scientific references Koktaite — Wikidata. https://www.wikidata.org/wiki/Q3816217 Link