Juansilvaite

Juansilvaite
Juansilvaite found in Chile
General
CategoryArsenate, Sulfate
Formula
(repeating unit)
Na5Al3[AsO3(OH)]4[AsO2(OH)2]2(SO4)2·4H2O
IMA symbolJsl[1]
Crystal systemMonoclinic
Crystal classPrismatic (2/m)
(same H-M symbol)
Space groupC2/c
Unit cella = 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]

References

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  1. ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
  2. ^ a b "Juansilvaite: Juansilvaite mineral information and data". Mindat.org. Retrieved 2016-03-04.
  3. ^ a b c 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
  4. ^ "Torrecillas mine, Salar Grande, El Tamarugal Province, Tarapacá Region, Chile - Mindat.org". Mindat.org. Retrieved 2016-03-04.