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Wollastonite-7A

A structural variant of Wollastonite
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03843930017271928973572.jpg
Wollastonite-7A

Japan
03843930017271928973572.jpg
Wollastonite-7A

Japan
03843930017271928973572.jpg
Wollastonite-7A

Japan
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About Wollastonite-7AHide

06278870017271927895908.jpg
William Hyde Wollaston
Formula:
CaSiO3
Colour:
White
Lustre:
Vitreous
Hardness:
5
Crystal System:
Triclinic
Name:
Named in honour of William Hyde Wollaston (6 August 1766, East Dereham, Norfolk, England, UK - 22 December 1828, London, England, UK), 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.


Unique IdentifiersHide

Mindat ID:
7370
Long-form identifier:
mindat:1:1:7370:3

Similar NamesHide

Wollastonite-1TA synonym of 'Wollastonite-1A'CaSiO3
Wollastonite-3TA synonym of 'Wollastonite-3A'Ca3(Si3O9)
Wollastonite-4TA synonym of 'Wollastonite-4A'Ca3(Si3O9)
Wollastonite-5TA synonym of 'Wollastonite-5A'Ca3(Si3O9)

Physical Properties of Wollastonite-7AHide

Lustre:
Vitreous
Colour:
White
Streak:
White
Hardness:
5 on Mohs scale

Chemistry of Wollastonite-7AHide

Mindat Formula:
CaSiO3
Element Weights:
Element% weight
O41.320 %
Ca34.502 %
Si24.178 %

Calculated from ideal end-member formula.
Elements listed:
Ca, O, Si - search for minerals with similar chemistry

Crystallography of Wollastonite-7AHide

Crystal System:
Triclinic

Synonyms of Wollastonite-7AHide

Other Language Names for Wollastonite-7AHide

Other InformationHide

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

Internet Links for Wollastonite-7AHide

References for Wollastonite-7AHide

Localities for Wollastonite-7AHide

Showing 2 localities.

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Japan
 
  • Hiroshima Prefecture
    • Shoubara City
Henmi et al. (1983)
  • Okayama Prefecture
    • Takahashi City
      • Bitchū
        • Fuka
Henmi et al. (1978)
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