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Wollastonite-7A

Formula:
CaSiO
 
3
Colour:WhiteLustre:Vitreous
Hardness:5
Name:Named after William Hyde Wollaston (1766-1828), English chemist and mineralogist who discovered palladium (1804) and rhodium (1809) and invented the reflecting goniometer (1809) and the camera lucida (1812).
A polytype of Wollastonite

The polytype wollastonite-7A (also known as -7T) was originally described from Fuka mine, Bitchu-cho (Bicchu-cho), Takahashi, Okayama Prefecture, Chugoku Region, Honshu Island, Japan.

Classification of Wollastonite-7A

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Physical Properties of Wollastonite-7A

Lustre:Vitreous
Colour:White
Streak:White
Hardness (Mohs):5

Chemical Properties of Wollastonite-7A

Formula:
CaSiO
 
3
Essential elements:Ca, O, Si
All elements listed in formula:Ca, O, Si

Other Names for Wollastonite-7A

Synonyms:
Wollastonite-7T
Other Languages:
Russian:Волластонит-7A

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Wollastonite-7A

Reference List:Henmi, C., Kusachi, I., Kawahara, A., and Henmi, K. (1978) 7T wollastonite from Fuka, Okayama Prefecture. Mineralogical Journal: 9: 169-181.

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    Localities for Wollastonite-7A

    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Japan
     
    • Honshu Island
      • Chugoku Region
        • Hiroshima prefecture
    		Henmi, C., Kawahara, A., Henmi, K., Kusachi, I., and Takeuchi, Y. (1983) The 3T, 4T and 5T polytypes of the wollastonite from Kushiro, Hiroshima Prefecture, Japan. American Mineralogist: 68: 156-163.
        • Okayama Prefecture
          • Takahashi
            • Bitchu-cho (Bicchu-cho)
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 1st Nov 2009 02:44:56