| 词条 | Posnjakite |
| 释义 |
| name = Posnjakite | category = Copper minerals | boxwidth = | boxbgcolor = | image = Posnjakite-113800.jpg | caption = Posnjakite from Špania Dolina in Slovakia | formula = Cu4[(OH)6{{Pipe}}SO4] • H2O | molweight = 488.32 g/mol | strunz = 7.DD.10 | dana = 31.4.1.1 | system = Monoclinic | class = Domatic (m) (same H-M symbol) | symmetry = Pa | unit cell = a = 10.578 Å, b = 6.345 Å, c = 7.863 Å; β = 117.98°; Z = 2[1] | color = Sky-blue to dark-blue | habit = Crystals scaly, or as crusts; earthy | twinning = | cleavage = | fracture = | tenacity = | mohs = 2 to 3 | luster = Vitreous | refractive = nα = 1.625 nβ = 1.680 nγ = 1.706 [1] | opticalprop = | birefringence = | pleochroism = | streak = | gravity = | density = | melt = | fusibility = | diagnostic = | solubility = | diaphaneity = | other = | references = [2] }}Posnjakite is a hydrated copper sulfate mineral. It was discovered in the Tungsten deposit of Nura-Taldy[3] in Karaganda Region in Kazakhstan and described in 1967 by Aleksandr Ivanovich Komkov (1926–1987) and Yevgenii Ivanovich Nefedov (1910–1976)[4] and named after geochemist Eugene Valdemar Posnjak (1888–1949).[5] OccurrencePosnjakite is an uncommon but widespread secondary mineral in the oxidised zone of copper sulfide deposits, which may be of post-mine formation. It is associated with brochantite, langite, devilline, serpierite, woodwardite, wroewolfeite, aurichalcite, azurite, malachite and chalcopyrite.[3] References1. ^1 Mindat - Posnjakite 2. ^[https://www.mineralienatlas.de/lexikon/index.php/MineralData?mineral=Posnjakite Mineralienatlas] 3. ^1 4. ^ 5. ^MINER Database, (c) Jacques Lapaire - Minéraux et étymologie {{webarchive|url=https://web.archive.org/web/20141006075331/http://jacksand.blogvie.com/2009/02/28/mineraux-et-etymologie/ |date=2014-10-06 }} 3 : Copper minerals|Sulfate minerals|Monoclinic minerals |
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