| 词条 | Arcanite |
| 释义 |
| name = Arcanite | image = Arcanite.jpg | imagesize = 260px | alt = | caption = Arcanite | category = Sulfate mineral | formula = K2SO4 | molweight = | strunz = 7.AD.05 | dana = | system = Orthorhombic | class = Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m) | symmetry = Pmcn | unit cell = a = 5.77, b = 10.07 c = 7.48 [Å]; Z = 4 | color = White to colorless, yellow | colour = | habit = Tabular crystals, typically in crusts and coatings | twinning = Cyclic on {110} | cleavage = Good on {010} and {001} | fracture = | tenacity = | mohs = 2 | luster = Vitreous | streak = White | diaphaneity = Transparent to translucent | gravity = 2.66 | density = | polish = | opticalprop = Biaxial (+) | refractive = nα = 1.494 nβ = 1.495 nγ = 1.497 | birefringence = δ = 0.004 | pleochroism = | 2V = Measured: 67° | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | references = [1][2][3] }} Arcanite is a potassium sulfate mineral with formula: K2SO4. Arcanite was first described in 1845 for an occurrence in old pine railroad ties in the Santa Ana tin mine, Trabuco Canyon, Santa Ana Mountains, Orange County, California, US.[1][3] It has also been reported from hydrothermal deposits in the Cesano geothermal field, Latium, Italy; in bat guano on the Chincha Islands of Peru; and in caves in Western Australia, South Africa and Namibia.[3] References1. ^1 Mindat.org {{sulfate-mineral-stub}}2. ^Webmineral data 3. ^1 2 Handbook of Mineralogy 3 : Sulfate minerals|Potassium minerals|Orthorhombic minerals |
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