| 词条 | Utahite |
| 释义 |
| name = Utahite | boxwidth = | boxbgcolor = | image = | imagesize = | alt = | caption = | category = Tellurate minerals | formula = Cu5Zn3(Te6+O4)4(OH)8•7H2O | molweight = 1,542.46 g/mol | strunz = 7.DE.25 | dana = | system = Triclinic Unknown space group | unit cell = a = 8.794 Å, b = 9.996 Å c = 5.66 Å; α = 104.1° β = 90.066°, γ = 96.3333°; Z = 1 | color = Pale blue, greenish blue | colour = | habit = Prismatic thin tabular to bladed crystals; as sheaves and bow tielike clusters | twinning = | cleavage = none | fracture = Brittle - uneven | tenacity = | mohs = 4-5 | luster = Vitreous to pearly | streak = Pale blue | diaphaneity = Translucent | gravity = 5.33 | density = | polish = | opticalprop = Biaxial | refractive = nα = 1.830 - 1.840 nβ = 1.830 - 1.900 nγ = 1.880 - 1.900 | birefringence = δ = 0.050 - 0.060 | pleochroism = | 2V = | dispersion = Strong | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | prop1 = | prop1text = | references = [1][2][3] }} Utahite is an extremely rare secondary copper zinc tellurate mineral found as a product of oxidation. Its chemical formula is Cu5Zn3(Te6+O4)4(OH)8•7H2O. It was first described in 1997 for an occurrence in the Centennial Eureka mine, one mile southeast of Eureka, Tintic District, Juab County, Utah, US (type locality). The discovery site was a mine dump of a hydrothermal ore deposit where it occurs with cesbronite and quartz.[3] It has also been reported from the Empire Mine in the Tombstone District of Cochise County, Arizona.[2] References1. ^Utahite, Webmineral.com {{sulfate-mineral-stub}}2. ^1 Utahite, Mindat.org 3. ^1 Handbook of Mineralogy 4 : Copper minerals|Zinc minerals|Tellurate and selenate minerals|Triclinic minerals |
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