Juansilvaite
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FormulaNa5Al3[AsO3(OH)]4[AsO2(OH)2]2(SO4)2·4H2O
| Juansilvaite | |
|---|---|
 Juansilvaite found in Chile | |
| General | |
| Category | Arsenate, Sulfate |
| Formula | Na5Al3[AsO3(OH)]4[AsO2(OH)2]2(SO4)2·4H2O |
| IMA symbol | Jsl[1] |
| Crystal system | Monoclinic |
| Crystal class | Prismatic (2/m) (same H-M symbol) |
| Space group | C2/c |
| Unit cell | a = 18.18, b = 8.63 c = 18.51 [Å], β = 90.39° (approximated) |
| Identification | |
| References | [2][3] |
Juansilvaite is a very rare,[2] complex arsenate-sulfate mineral with formula Na5Al3[AsO3(OH)]4[AsO2(OH)2]2(SO4)2·4H2O.[3] 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.[4] Although having quite common among minerals space group C2/c, juansilvaite has a new type of structure.[3]
