Mauriziodiniite, NH₄(As₂O₃)₂I, the ammonium and iodine analogue of lucabindiite from the Torrecillas mine, Iquique Province, Chile

The new mineral mauriziodiniite (IMA2019-036), NH 4 (As 2 O 3 ) 2 I, was found at the Torrecillas mine, Iquique Province, Chile, where it is a secondary alteration phase associated with calcite, cuatrocapaite-(NH 4 ), lavendulan, magnesiokoritnigite and torrecillasite on matrix consisting of native arsenic, arsenolite and pyrite. Mauriziodiniite occurs as hexagonal tablets up to ~300 μm in diameter. Crystals are colourless and transparent, with...