Digital images in reflected plane polarized light (a, b, c) and BSE image (d) showing arsenotučekite from the chromitite of Tsangli. Abbreviations: atc = arsenotučekite, epx = epoxy, chr = chromite, chl = chlorite, pn = pentlandite, btp = breithauptite. 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: Federica Zaccarini, Luca Bindi, Basilios Tsikouras, Tassos Grammatikopoulos, Christopher J. Stanley & Giorgio Garuti · CC BY 4.0
Arsenotučekite
Arsenotučekite is an IMA-recognized mineral species in the sulfosalt class, with the chemical formula Ni₁₈Sb₃AsS₁₆.
It crystallizes in the tetragonal crystal system (space group I4/mmm). It is a member of the hauchecornite structural group.
Key properties: specific gravity 6.477; Metallic luster.
IMA symbol Atuč, IMA status: approved, named in 2020.
Found in ophiolite. Likely precipitated during late hydrothermal stages by reaction of Sb- and As-bearing solutions with magmatic sulfides or during the serpentinization of the host peridotite.
It is found associated with Pentlandite, breithauptite, gersdorffite, chlorite.
The prefix indicates the As-dominant analogue of tučekite.