Wiklundite

Wiklundite
General
Category Silicate
Formula
(repeating unit)		 see text
Crystal system Trigonal
Unit cell a= 8.26, c= 126.59 [Å] (approximated)
Identification
Crystal symmetry Trigonal - hexagonal scalenohedral
Point group 3m
Space group R3c
References [1]

Wiklundite is a rare[2] and complex arsenite-silicate mineral with the formula Pb2(Mn2+,Zn)3(Fe3+,Mn2+)2(Mn2+,Mg)19(As3+O3)2(Si,As5+O4)6(OH)18Cl6. The mineral characterizes in a large c unit cell parameter.[1] It was found in Långban, Sweden - a home for many rare and exotic minerals.[3]

Relation to other minerals

Structure of wiklundite is unique.[1] A slightly chemically similar mineral, although lacking manganese and iron, is hereroite.[4]

References

  1. 1 2 3 Cooper, M.A., Hawthorne, F.C., Langhof, J., Hålenius, U., and Holtstam, D., 2015. Wiklundite, IMA 2015-057. CNMNC Newsletter No. 27, October 2015, 1227; Mineralogical Magazine 79, 1229–1236
  2. ↑ "Wiklundite: Wiklundite mineral information and data". Mindat.org. Retrieved 2016-03-13.
  3. ↑ "Långban, Filipstad, Värmland, Sweden - Mindat.org". Mindat.org. Retrieved 2016-03-13.
  4. ↑ "Hereroite: Hereroite mineral information and data". Mindat.org. Retrieved 2016-03-13.
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