Ewingite

Ewingite is a mineral discovered by Jakub Plášil of the Institute of Physics at the Academy of Sciences of the Czech Republic in the Plavno mine, Czech Republic. Travis Olds of the University of Notre Dame and colleagues described ewingite, which is the most structurally complex known mineral on Earth. Ewingite is named in honor of Rodney C. Ewing, Professor of Geological Sciences at Stanford University, USA.[2]

Ewingite
General
CategoryOrganic mineral
Formula
(repeating unit)		Mg8Ca8(UO2)24(CO3)30O4(OH)12·138H2O
Crystal systemTetragonal
Crystal class4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Identification
ColorYellow
References[1]

The mineral is rare, due to its very narrow pH and compositional range required for formation, which are only known to occur in the Plavno mine. Ewingite forms through uranium oxidation occurring in the mine's humid environment.[2]

The mineral is chemically similar to rabbittite, swartzite, and albrechtschraufite.[1]

The type specimen of ewingite has been placed in the mineralogy collections at the Natural History Museum of Los Angeles County.[2]

Localities

Czech Republic : Plavno mine, Jáchymov District, Krušné Hory Mts, Karlovy Vary Region, Bohemia

References
  1. "Ewingite: Ewingite mineral information and data". www.mindat.org. Retrieved 2017-09-04.
  2. "New Mineral Listing | Carbon Mineral Challenge". mineralchallenge.net. Retrieved 2017-09-04.


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.