Indistinct crystals and crystal aggregates of white katsarosite grown directly on sphalerite. An overlaying epsomite layer has been removed by dissolution in deionized water. The image is published in an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( https://creativecommons.org/licenses/by/4.0/ ). — Photo: Giester, Gerald and Rieck, Branko and Lengauer, Christian and Kolitsch, Uwe and Nasdala, Lutz · CC BY 4.0
Katsarosite
A rare organic mineral — hydrated zinc oxalate.
Intro adapted from Wikipedia (CC BY-SA).
Katsarosite is an IMA-recognized mineral species in the organic mineral class, with the chemical formula Zn(C₂O₄)·2H₂O.
It crystallizes in the monoclinic crystal system (space group C2/c). It is a member of the Humboldtine, Oxalate structural group.
IMA symbol Kat, IMA status: approved, named in 2020.