Effenbergerite is the natural occurrence of the color

Han blue Han purple and Han blue (also called Chinese purple and Chinese blue) are synthetic barium copper silicate pigments developed in China and used in ancient and imperial China from the Western Zhou period (1045–771 BC) until the end of the Han dy ...

. It was first found in the Wessels mine, Kalahari Manganese Field,

South Africa South Africa, officially the Republic of South Africa (RSA), is the Southern Africa, southernmost country in Africa. Its Provinces of South Africa, nine provinces are bounded to the south by of coastline that stretches along the Atlantic O ...

. Effenbergerite was approved as a valid mineral species by the

IMA IMA or Ima may refer to: Education * Indian Military Academy, Dehradun * Instituto Miguel Ángel, a school in Mexico City Galleries and museums * Indianapolis Museum of Art, Indiana, US * Institut du Monde Arabe, Paris, France * Islamic Mus ...

in 1993. Effenberergite has the chemical formula . The mineral was named after Dr. Herta S. Effenberger, a

mineralogist Mineralogy is a subject of geology specializing in the scientific study of the chemistry, crystal structure, and physical (including optical mineralogy, optical) properties of minerals and mineralized artifact (archaeology), artifacts. Specific s ...

and crystallographer at the

University of Vienna The University of Vienna (, ) is a public university, public research university in Vienna, Austria. Founded by Rudolf IV, Duke of Austria, Duke Rudolph IV in 1365, it is the oldest university in the German-speaking world and among the largest ...

References

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External links

* https://rruff.info/Effenbergerite * http://database.iem.ac.ru/mincryst/s_carta.php?EFFENBERGERITE * http://rruff.geo.arizona.edu/AMS/result.php?mineral=Effenbergerite * https://mineralogy-ima.org/ Barium minerals Copper minerals Tetragonal minerals