Keatite

Keatite

Crystal structure
General
Category Silicate mineral
Formula
(repeating unit)
SiO2
Strunz classification 4.DA.45
Identification
Crystal habit Microscopic inclusions
Crystal system Tetragonal

Keatite is a silicate mineral with the chemical formula SiO2 (silicon dioxide) that was discovered in 2013. It is a tetragonal polymorph of silica first known as a synthetic phase.[1] It was reported as minute inclusions within clinopyroxene (diopside) crystals in an ultra high pressure garnet pyroxenite body. The host rock is part of the Kokchetav Massif in Kazakhstan.[2]

References

  1. Ralph, Jolyon, and Ida Ralph. "Keatite: Keatite Mineral Information and Data." MinDat. 2013. Aug. 2013 <http://www.mindat.org/min-2173.html>.
  2. Hill, Tina R., Hiromi Konishi, and Huifang Xu, Natural occurrence of keatite precipitates in UHP clinopyroxene from the Kokchetav Massif: A TEM investigation, American Mineralogist, Volume 98, pages 187–196, 2013 Abstract