| 词条 | Juansilvaite |
| 释义 |
| name = Juansilvaite | category = Arsenate, Sulfate | boxwidth = | boxbgcolor = | image = Juansilvaite-797218.jpg | imagesize = | caption = Juansilvaite found in Chile | formula = Na5Al3[AsO3(OH)]4[AsO2(OH)2]2(SO4)2·4H2O | molweight = | strunz = | dana = | system = Monoclinic | class = Prismatic (2/m) (same H-M symbol) | symmetry = C2/c | unit cell = a = 18.18, b = 8.63 c = 18.51 [Å], β = 90.39° (approximated) | color = | habit = | twinning = | cleavage = | fracture = | tenacity = | mohs = | luster = | polish = | refractive = | opticalprop = | birefringence = | 2V = | dispersion = | pleochroism = | fluorescence= | absorption = | streak = | gravity = | density = | melt = | fusibility = | diagnostic = | solubility = | diaphaneity = | other = | references =[1][2] }}Juansilvaite is a very rare,[1] complex arsenate-sulfate mineral with formula Na5Al3[AsO3(OH)]4[AsO2(OH)2]2(SO4)2·4H2O.[2] It is both hydroxyarsenate and dihydroxyarsenate. It is among few relatively new minerals from the Torrecillas mine in Chile, the other being torrecillasite, canutite, chongite, gajardoite, leverettite, and magnesiokoritnigite.[3] Although having quite common among minerals space group C2/c, juansilvaite has a new type of structure.[2] References1. ^1 {{cite web|url=http://www.mindat.org/min-46912.html |title=Juansilvaite: Juansilvaite mineral information and data |website=Mindat.org |accessdate=2016-03-04}} {{mineral-stub}}2. ^1 2 Kampf, A.R., Nash, B., Dini, M., and Molina Donoso, A.A., 2015. Juansilvaite, IMA 2015-080. CNMNC Newsletter No. 28, December 2015, page ; Mineralogical Magazine 79, 1859–1864 3. ^{{cite web|url=http://www.mindat.org/loc-190910.html |title=Torrecillas mine, Salar Grande, El Tamarugal Province, Tarapacá Region, Chile - Mindat.org |website=Mindat.org |accessdate=2016-03-04}} 4 : Sodium minerals|Aluminium minerals|Arsenate minerals|Monoclinic minerals |
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