Effenbergerite

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Effenbergerite-160236.jpg
General
Category Minerals
Formula BaCuSi4O10
Strunz classification 09.EA.05
Dana classification 71.02.03.03
Crystal system tetragonal
Crystal class P4/ncc
Structure
Identification
Formula mass 473.21
Colourblue
Luster vitreous
Streak pale blue
Diaphaneity transparent
Density 3.57 - 3.52
Optical propertiesUniaxial (-)
Refractive index e=1.593, w=1.633

Effenbergerite is the natural occurrence of the color Han blue.It was first found in the Wessels mine, Kalahari Manganese Field, [1] South Africa. [2] Effenbergerite was approved as a valid mineral species by the IMA in 1993. [3]

Effenberergite has the chemical formula BaCuSi4O10. [4]

The mineral was named after Dr. Herta S. Effenberger, a mineralogist and crystallographer at the University of Vienna. [4]

References

  1. ↑ "The Kalahari Manganese Fields | Cape Minerals". www.capeminerals.co.za.
  2. ↑ Giester, G.; Rieck, B. (December 1994). "Effenbergerite, BaCu[Si4O10], a new mineral from the Kalahari Manganese Field, South Africa: description and crystal structure" . Mineralogical Magazine. 58 (393): 663–670. Bibcode:1994MinM...58..663G. doi:10.1180/minmag.1994.058.393.17. ISSN   0026-461X. S2CID   56047566.
  3. ↑ "Effenbergerite". www.mindat.org.
  4. 1 2 "Effenbergerite Mineral Data". webmineral.com.
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