...A. R. Kampf; B. P. Nash; M. Dini; A. A. Molina Donoso Abstract The new mineral magnesiokoritnigite (IMA 2013-049), ideally Mg(AsO 3 OH)·H 2 O, was found at the Torrecillas mine, Salar Grande, Iquique Province, Chile, where it occurs as a secondary alteration phase in association with anhydrite...

...Anthony R. Kampf; Gerhard Möhn; Chi Ma; Joy Désor Abstract The new mineral naalasite (IMA2023–027), NaAl(AsO 3 OH) 2 ⋅H 2 O, was found at the Torrecillas mine, Iquique Province, Chile, where it is a secondary alteration phase associated with anhydrite, juansilvaite, magnesiokoritnigite...

... estimated the log K sp for magnesiokoritnigite as –2.0. Calculation of phase diagrams shows that all these phases originate under acidic conditions from solutions with high metal and arsenate concentration. They are restricted to local environments, to pockets that maintain such high concentrations over...

...Fig. 2. Pink nafeasite druse with white magnesiokoritnigite on cotype specimen 76194; the field of view is 0.84 mm across. ...

..., 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 pearly to adamantine lustre and white streak. The Mohs hardness is ~1. Tablets are sectile...

..., canutite, halite, lavendulan and magnesiokoritnigite. Magnesiocanutite occurs as pale brownish-pink to rose-pink, lozenge-shaped tablets that are often grouped in tightly intergrown aggregates. The crystal forms are {110} and {102}. Crystals are transparent, with vitreous lustre and white to very pale pink...

... in association with anhydrite, canutite, chudobaite, halite, lavendulan, magnesiokoritnigite, quartz, scorodite and torrecillasite. Currierite occurs as hexagonal prisms, needles and hair-like fibres up to ∼200 μm long, in sprays. The crystal forms are {100} and {001}. Crystals are transparent, with vitreous...

... alteration phase in association with anhydrite, halite, lavendulan, magnesiokoritnigite, pyrite, quartz and scorodite. Canutite is reddish brown in colour. It forms as prisms elongated on [201İ] and exhibiting the forms {010}, {100}, {102}, {201} and {102İ}, or as tablets flattened on {102} and exhibiting...

..., lavendulan, magnesiokoritnigite, marcasite, quartz, pyrite, scorodite, wendwilsonite and other potentially new As-bearing minerals. Torrecillasite occurs as thin colourless prisms up to 0.4 mm long in jack-straw aggregates, as very thin fibres in puff balls and as massive intergrowths of needles. Prisms...