| 词条 | Wyartite |
| 释义 |
| name = Wyartite | boxwidth = | boxbgcolor = | image = | imagesize = | alt = | caption = | category = Carbonate minerals | formula = {{Chem|CaU|5+|(UO|2|)|2|(CO|3|)O|4|(OH)}}·7H2O | molweight = | strunz = 5.EA.15 | system = Orthorhombic | class = Disphenoidal (222) Space group: (222) | symmetry = P212121 | unit cell = | color = black, violet-black (fresh); yellowish brown, greenish brown (exposed) | colour = | habit = | twinning = | cleavage = | fracture = | tenacity = | mohs = | luster = vitreous, sub-metallic, dull | streak = | diaphaneity = transparent, translucent, opaque | gravity = | density = | polish = | opticalprop = | refractive = | birefringence = | pleochroism = | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | prop1 = | prop1text = | references = [1][2] }}Wyartite {{Chem|CaU|5+|(UO|2|)|2|(CO|3|)O|4|(OH)}}·7H2O is a uranium bearing mineral named after Jean Wyart (1902–1992), mineralogist at the Sorbonne, Paris. It has greenish-black, black, or violet-black, translucent to opaque orthorhombic crystals.[3] A hardness of 3 - 4 Mohs. Its other names are Ianthinite (of Bignand), Wyartit and Wyartita. It belongs to the uranium carbonate group of minerals. It is found next to rutherfordine in Shinkolobwe, Shaba, Zaire.[3] Determination of the structure of wyartite provided the first evidence for a pentavalent uranium mineral. Like all uranium minerals it is radioactive. References1. ^Mindat {{Carbonate-mineral-stub}}2. ^[https://www.mineralienatlas.de/lexikon/index.php/MineralData?mineral=Wyartite Mineralienatlas] 3. ^1 Webmineral data 4 : Uranium minerals|Calcium minerals|Carbonate minerals|Orthorhombic minerals |
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