Fichtelite Explained

Fichtelite
Category:Organic mineral
Formula:C19H34
Imasymbol:Fic[1]
Strunz:10.BA.05
Hydrocarbons
Dana:50.03.04.01
System:Monoclinic
Class:Sphenoidal (2)
(same H-M symbol)
Symmetry:P21
Color:Colorless, white, pale yellow
Habit:Elongated tabular crystals
Cleavage:Good on and
Mohs:1
Luster:Greasy
Streak:White
Diaphaneity:Transparent
Gravity:0.631 calculated 1.032
Opticalprop:Biaxial
Melt:44.2 °C – 45.0 °C
References:[2] [3] [4]

Fichtelite is a rare white mineral found in fossilized wood from Bavaria. It crystallizes in the monoclinic crystal system. It is a cyclic hydrocarbon: dimethyl-isopropyl-perhydrophenanthrene, C19H34. It is very soft with a Mohs hardness of 1, the same as talc. Its specific gravity is very low at 1.032, just slightly denser than water.

It was first described in 1841 and named for the location, Fichtelgebirge, Bavaria, Germany.[4] It has been reported from fossilized pine wood from a peat bog and in organic-rich modern marine sediments.[2]

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. http://rruff.geo.arizona.edu/doclib/hom/fichtelite.pdf Handbook of Mineralogy
  3. http://webmineral.com/data/Fichtelite.shtml Webmineral data
  4. http://www.mindat.org/min-1545.html Mindat.org