Pseudowollastonite Explained

Pseudowollastonite
Category:	Cyclosilicate
Imasymbol:	Pwo^[1]
Strunz:	9.CA.20
System:	Monoclinic
Class:	Prismatic (2/m) (same H-M symbol)
Symmetry:	C2/c
Luster:	Vitreous
Diaphaneity:	Transparent
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.

Notes and References

1. Warr. L.N.. 2021. IMA–CNMNC approved mineral symbols. Mineralogical Magazine. 85. 3 . 291–320. 10.1180/mgm.2021.43 . 2021MinM...85..291W . 235729616 . free.
2. https://www.mineralienatlas.de/lexikon/index.php/MineralData?mineral=Pseudowollastonite Mineralienatlas
3. http://www.mindat.org/min-9535.html 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
5. Fleischer, M., 1973, New mineral names: Cyclowollastonite, American Mineralogist: 58: 560