Chemistry:Effenbergerite
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Short description: Blue mineral
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| General | |
|---|---|
| Category | Mineral |
| Formula (repeating unit) | 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 |
| Colour | blue |
| |re|er}} | vitreous |
| Streak | pale blue |
| Diaphaneity | transparent |
| Density | 3.57 - 3.52 |
| Optical properties | Uniaxial (-) |
| 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 BaCuSi
4O
10.[4]
The mineral was named after Dr. Herta S. Effenberger, a mineralogist and crystallographer at the University of Vienna.[4]
References
- ↑ "The Kalahari Manganese Fields | Cape Minerals". https://www.capeminerals.co.za/the-kalahari-manganese-fields.
- ↑ Giester, G.; Rieck, B. (December 1994). "Effenbergerite, BaCu[Si4O10, a new mineral from the Kalahari Manganese Field, South Africa: description and crystal structure"] (in en). Mineralogical Magazine 58 (393): 663–670. doi:10.1180/minmag.1994.058.393.17. ISSN 0026-461X. Bibcode: 1994MinM...58..663G. https://www.cambridge.org/core/journals/mineralogical-magazine/article/abs/effenbergerite-bacusi4o10-a-new-mineral-from-the-kalahari-manganese-field-south-africa-description-and-crystal-structure/F0C433C47C392677A3B71F274ADDE936.
- ↑ "Effenbergerite". https://www.mindat.org/min-6911.html.
- ↑ 4.0 4.1 "Effenbergerite Mineral Data". http://webmineral.com/data/Effenbergerite.shtml.
External links
- https://rruff.info/Effenbergerite
- http://database.iem.ac.ru/mincryst/s_carta.php?EFFENBERGERITE
- https://www.google.com/search?q=Effenbergerite&tbm=isch
- http://rruff.geo.arizona.edu/AMS/result.php?mineral=Effenbergerite
- https://mineralogy-ima.org/
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