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Wollastonite-2M

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Formula:
CaSiO3
Colour:
White
Lustre:
Vitreous, Silky
Hardness:
5
Crystal System:
Monoclinic
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


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Classification of Wollastonite-2MHide

65.2.1.1b

65 : INOSILICATES Single-Width,Unbranched Chains,(W=1)
2 : Single-Width Unbranched Chains, W=1 with chains P=3
14.5.3

14 : Silicates not Containing Aluminum
5 : Silicates of Ca

Physical Properties of Wollastonite-2MHide

Vitreous, Silky
Colour:
White
Streak:
White
Hardness:

Chemical Properties of Wollastonite-2MHide

Formula:
CaSiO3

Crystallography of Wollastonite-2MHide

Crystal System:
Monoclinic

Other Language Names for Wollastonite-2MHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Sarabauite5 photos of Wollastonite-2M associated with Sarabauite on mindat.org.
Grossular4 photos of Wollastonite-2M associated with Grossular on mindat.org.

Related Minerals - Dana Grouping (8th Ed.)Hide

65.2.1.1cWollastoniteCaSiO3Tric. 1 : P1
65.2.1.1aWollastonite-1ACaSiO3Tric.
65.2.1.2BustamiteCaMn2+(Si2O6)Tric. 1 : P1
65.2.1.3FerrobustamiteCaFe2+(Si2O6)Tric.
65.2.1.4aPectoliteNaCa2Si3O8(OH)Tric. 1 : P1
65.2.1.5SeranditeNaMn2+2Si3O8(OH)Tric. 1 : P1
65.2.1.6CascanditeCa(Sc,Fe3+)(HSi3O9)Tric.
65.2.1.7DenisoviteCa2(K,Na)Si3O8(F,OH)2Mon.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

14.5.1WollastoniteCaSiO3Tric. 1 : P1
14.5.2Wollastonite-7TCaSiO3
14.5.4RankiniteCa3Si2O7Mon. 2/m : P21/b
14.5.5KilchoaniteCa6(SiO4)(Si3O10)Orth.
14.5.6LarniteCa2SiO4Mon.
14.5.7BredigiteCa7Mg(SiO4)4Orth.
14.5.8HatruriteCa3(SiO4)OTrig.
14.5.9RosenhahniteHCa3[Si3O9(OH)]Tric.
14.5.10DellaiteCa6Si3O11(OH)2Tric.
14.5.11AfwilliteCa3(HSiO4)2 · 2H2OMon. m : Bb
14.5.12XonotliteCa6(Si6O17)(OH)2Mon. 2/m
14.5.13FoshagiteCa4(Si3O9)(OH)2Tric.
14.5.14HillebranditeCa2(SiO3)(OH)2Orth. mmm (2/m 2/m 2/m) : Cmcm
14.5.15JaffeiteCa6(Si2O7)(OH)6Trig. 3 : P3
14.5.16SuoluniteCa2(H2Si2O7) · H2OOrth.
14.5.17KillalaiteCa6.4(H0.6Si2O7)2(OH)2Mon.
14.5.18OkeniteCa10Si18O46 · 18H2OTric. 1 : P1
14.5.19RiversideiteCa5(HSi3O9)2 · 2H2OOrth.
14.5.20TrabzoniteCa4(Si3O9)(OH)2Orth. mm2 : Ama2
14.5.21GyroliteNaCa16Si23AlO60(OH)8 · 14H2OTric.
14.5.22FoshallasiteCa3[Si2O7] · 3H2O(?)
14.5.23Tobermorite[Ca4Si6O17 · 2H2O]·(Ca·3H2O)Orth.
14.5.24Clinotobermorite[Ca4Si6O17 · 2H2O]·(Ca·3H2O)Mon.
14.5.25NekoiteCa3Si6O15·7H2OTric. 1 : P1
14.5.26Plombièrite[Ca4Si6O16(OH)2 · 2H2O]·(Ca·5H2O)Orth.
14.5.27JenniteCa9(Si3O9)2(OH)8 · 8H2OTric.

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.

References for Wollastonite-2MHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
American Journal of Science (1935), 230, 495.
Hesse, K.F. (1984) Refinement of the crystal structure of wollastonite-2M (parawollastonite). Zeitschrift für Kristallographie: 168: 93-98.
Seto, Y., Ohi, S., Shimobayashi, N., Kitamura, M., Miyake, A., Hiroi, Y., and Grantham, G.H. (2006) Clinopyroxene exsolution in wollastonite from Namaqualand granulite, South Africa. American Mineralogist: 91: 446-450.

Internet Links for Wollastonite-2MHide

Localities for Wollastonite-2MHide

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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
China
 
  • Anhui Province
    • Tongling Prefecture
      • Shizishan ore field
Zongxun Chen (1986): Acta Petrologica et Mineralogica 5(2), 168-170
Italy
 
  • Campania
    • Naples Province
      • Somma-Vesuvius Complex
www.dinet.it/Mineral-GMC/AMI/vesuvio.html.
  • Lombardy
    • Sondrio Province
      • Valtellina
        • Tresivio
Bedognè, F., Montrasio, A., Sciesa, E. (2006) I minerali della media-alta Valtellina, delle Orobie valtellinesi e della Val Poschiavo. Aggiornamenti sulle altre località della provincia di Sondrio. Bettini, Sondrio, 255 pp.
  • Trentino-Alto Adige (Trentino-Südtirol)
    • Trento Province
      • Fiemme Valley
        • Predazzo
Demartin, F., Campostrini, I., Grisotto, M., & Grisotto, L. (2006). I Canzoccoli. Una località classica presso Predazzo, Val di Fiemme, Trento. Rivista Mineralogica Italiana, 30(3), 166-177.
      • Lagarina Valley
        • Ala
          • Pilcante
Giorgio Bortolozzi collection (XRD analysis at Ispra Institute)
Malaysia
 
  • Borneo
    • Sarawak
      • Kuching
        • Bau
No reference listed
Mexico
 
  • Chihuahua
    • Pueblito de Allende
www.lpi.usra.edu/meetings/metsoc2002/pdf/5053.pdf.
USA
 
  • California
    • Riverside Co.
      • Crestmore
[micromounts@yahoogroups.com]
Mineral and/or Locality  
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