...Fig. 2. Colourless prismatic crystals of antofagastaite from the Coronel Manuel Rodríguez mine: ( a ) on yellowish metasideronatrite; ( b ) on orange–yellow sideronatrite (partially altered to metasideronatrite) with blue aubertite. Field of view width: ( a ) 3.8 mm and ( b ) 8.9 mm. Photo: I.V...

... minerals are vendidaite, eriochalcite, Mg-rich aubertite, magnesioaubertite, belloite, alunite, kaolinite, and halloysite. Riotintoite forms colorless platy crystals up to 0.1 × 0.4 × 0.4 mm in size and exhibits the forms {010} (the major form), {001}, {100}, {110}, {01 }, {1 0}, {2 0}, {123}, { 23}, { 31...

..., Chile. Associated minerals are aubertite, magnesioaubertite, belloite, eriochalcite, alunite, kaolinite, and halloysite. Vendidaite forms colorless platy crystals up to 0.01 × 0.3 × 0.3 mm in size; these occur in clusters up to 0.5 mm across. Vendidaite is brittle, with estimated Mohs’ hardness of 2–2...

... good, with 178 (about 60%) in the combined superior and excellent categories. The species in all of the categories are listed below. Aluminite, aluminocopiapite, alunogen, amarillite, anorthominasragrite, antlerite, aphthitalite, apjohnite, arcanite, aubertite, barite, bianchite, bieberite...

... sulfate group than epsomite. Magnesioaubertite, (Mg,Cu) Al(SO 4 ) 2 Cl(H 2 O) 14 , is chemically similar to wilcoxite but the atomic structure is different. Ginderow & Cesbron (1982) determined the atomic structure of aubertite, AlCuCl(SO 4 ) 2 (H 2 O) 14 , and although the structure consists...

... on the dumps of the La Vendida mine. The mineral was found in association with aubertite, magnesioaubertite, belloite, eriochalcite, alunite, kaolinite, and halloysite. Vendidaite forms platy crystals up to 0.01 × 0.3 × 0.3 mm, flattened on (010), and forming clusters up to 0.5 mm, as well as white, fine...

... mineral ponomarevite K 4 Cu 4 OCl 10 X Ephemeral fumarole mineral aubertite Cu 2+ Al(SO 4 ) 2 Cl·14H 2 O X Water-soluble supergene mineral bayleyite Mg 2 (UO 2 )(CO 3 ) 3 ·18H 2 O X Water-soluble supergene mineral caracolite Na 2 Pb 2 (SO 4 ) 3 Cl X Water-soluble...

...Figure 14. The structures of sulfate minerals with isolated (SO 4 ) tetrahedra and ( M Ø 6 ) octahedra: (a) hexahydrite; (b) retgersite. The structures of sulfate minerals with isolated (SO 4 ) tetrahedra and ( M Ø 6 ) octahedra: (c) epsomite; (d) bieberite; (e) alunogen; (f) aubertite. ...

... the abandoned La Vendida mine (until 1990 known as the Rio Tinto mine) situated about 3 km WNW of the Sierra Gorda village, Antofagasta Region, Atacama desert, Chile. It occurs in association with intermediate members of the aubertite–magnesioaubertite solid-solution series, belloite, eriochalcite, alunite...