Jump to content

Pseudowollastonite

From Wikipedia, the free encyclopedia
Pseudowollastonite
White crystals of pseudowollastonite from Passau, Lower Bavaria, Germany
General
CategoryCyclosilicate
IMA symbolPwo[1]
Strunz classification9.CA.20
Crystal systemMonoclinic
Crystal classPrismatic (2/m)
(same H-M symbol)
Space groupC2/c
Identification
LusterVitreous
DiaphaneityTransparent
References[2]

Pseudowollastonite is a high-temperature mineral phase of CaSiO3 and is polymorphous with wollastonite. Its formula can alternatively be written as Ca3Si3O9. Other names include ß-Wollastonite, and cyclowollastonite.[3][4]

It occurs in high temperature (pyrometamorphic) environments such as the Hatrurim Formation of the Negev Desert[3] and the graphite mine at Pfaffenrenth near Hauzenberg, Bavaria.[5] It also occurs in slags and cement.

References

[edit]
  1. ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
  2. ^ Mineralienatlas
  3. ^ a b Pseudo wollastonite on Mindat.org
  4. ^ Glossary of Geology, eds. Julia A. Jackson, James P. Mehl, and Klaus K. E. Neuendorf; American Geosciences Institute, 2011, 5th ed., p. 524 ISBN 978-0922152896
  5. ^ Fleischer, M., 1973, New mineral names: Cyclowollastonite, American Mineralogist: 58: 560