
Austinite is a member of the adelite-descloizite group, adelite subgroup, the zinc (Zn) end member of the copper-Zn series with conichalcite. It is the zinc analogue of cobaltaustinite and nickelaustinite. At one time “brickerite” was thought to be a different species, but it is now considered to be identical to austinite. Austinite is named in honour of Austin Flint Rogers (1877–1957), American mineralogist from Stanford University, California, US.
via Wikipedia infobox
{{Infobox mineral | name = Austinite | category = Arsenate minerals | boxwidth = 20 | image = Austinite-177832.jpg | imagesize = 260px | alt = | caption = Austinite from the Ojuela Mine, Mexico | formula = CaZnAsO4(OH) |IMAsymbol=Aus | molweight = 261.38 g/mol | strunz = 8.BH.35 | dana = 41.5.1.3 | system = Orthorhombic | class = Disphenoidal (222) H-M symbol: (2 2 2) | symmetry = P212121 | unit cell = a = 7.43, b = 9.00 c = 5.90 [Å], Z = 4 | color = Colourless, white to pale yellowish-white or bright green, colourless in transmitted light | habit = Well developed orthorhombic crystals of bladed or acicular habit elongated parallel to the c axis, sometimes with sceptre-like terminations, also radially fibrous crusts and nodules. Common forms are {110}, {111}, {1–11}, {010} and {011}. | lattice = | twinning = Left- and right-handed individuals joined on {100}, with {010} and {001} coincident. | cleavage = Good in two directions parallel to the prism faces {110} | fracture = | tenacity = Brittle | mohs = 4 to 4.5 | luster = Subadamantine to silky in fibrous aggregates | refractive = nα = 1.759, nβ = 1.763, nγ = 1.783, | 2V = 47° |dispersion= r > v weak | opticalprop = Biaxial (+) | birefringence = 0.024 | pleochroism = | streak = White | gravity = 4.12 | density = | melt = | fusibility = | diagnostic = | solubility =Easily soluble in cold dilute HCl | diaphaneity = Translucent to transparent | other = Non-radioactive. Some austinite fluoresces green under SWUV. | references = }} Austinite is a member of the adelite-descloizite group, adelite subgroup, the zinc (Zn) end member of the copper-Zn series with conichalcite. It is the zinc analogue of cobaltaustinite and nickelaustinite. At one time “brickerite” was thought to be a different species, but it is now considered to be identical to austinite. Austinite is named in honour of Austin Flint Rogers (1877–1957), American mineralogist from Stanford University, California, US.
==Structure== thumb|left|140px|Left-handed austinite thumb|left|140px|Right-handed austinite The structure is composed of chains of edge-sharing polyhedra ZnO6, and very distorted Ca(O,OH)8 polyhedra linked through AsO4 into a three-dimensional network.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).