Hisingerite Explained

Hisingerite
Category:Silicate mineral
Imasymbol:Hsg[1]
Strunz:9.ED.10
System:Monoclinic
Unknown space group
Unit Cell:a = 5.4, b = 9.03
c = 14.99 [Å]; β = 98.32°; Z = 4
Color:Black, brownish-black
Habit:Massive, compact; acicular, may be minutely spherical.
Cleavage:None
Fracture:Conchoidal
Tenacity:Brittle
Mohs:2.5 - 3.0
Luster:Vitreous, resinous, greasy
Streak:Yellowish brown, green
Diaphaneity:Transparent to translucent
Gravity:2.43 - 2.67
Opticalprop:Biaxial (-)
Refractive:nα = 1.715 nγ = 1.730
Birefringence:δ = 0.015
References:[2] [3] [4]

Hisingerite is an iron(III) phyllosilicate mineral with formula . A black or dark brown, lustrous secondary mineral, it is formed by the weathering or hydrothermal alteration of other iron silicate and sulfide minerals.[2]

It was first described in 1751 by A.F. Cronstedt from Väster Silvberg, Dalarna, Sweden (under the name “kolspeglande järnmalm”), and in 1810 by W. Hisinger from the Gillinge iron mine, Södermanland, Sweden (“svart stenart”, later “gillingit”).[5] In 1828 it was found at an occurrence in Riddarhyttan, Vastmanland, Sweden. It was named after Wilhelm Hisinger (1766–1852), a Swedish chemist.[4]

There are also aluminian hisingerite variety in which one of the iron atoms is replaced by aluminium and chrome-alumina-hisingerite variety in which chromium substitutes for iron.[3]

Notes and References

  1. Warr. L.N.. 2021. IMA–CNMNC approved mineral symbols. Mineralogical Magazine. 85. 3 . 291–320. 10.1180/mgm.2021.43 . 2021MinM...85..291W . 235729616 . free.
  2. Web site: Handbook of Mineralogy . 2008-10-23 . 2016-04-02 . https://web.archive.org/web/20160402002322/http://www.handbookofmineralogy.org/pdfs/hisingerite.pdf . dead .
  3. http://www.mindat.org/min-1910.html Mindat.org
  4. http://www.webmineral.com/data/Hisingerite.shtml Webmineral
  5. Holtstam . Dan . 2023-04-04 . Prehistory of an enigmatic mineral: hisingerite . GFF . en . 1–3 . 10.1080/11035897.2023.2187079 . 1103-5897. free .