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Pseudowollastonite

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About PseudowollastoniteHide

Formula:
CaSiO3
This formula only indicates the stoichiometry of the mineral. In order to reflect the structural units the mineral is composed of, the formula may also be written as Ca(Si3O9)0.33 or as Ca3(Si3O9).
Lustre:
Vitreous
Crystal System:
Monoclinic
Name:
After chemical relationship to wollastonite.
Dimorph of:
Well known as an artificial high-temperature phase dimorphous with Wollastonite from slags and cement, but also very rare found in nature from pyrometamorphosed calcareous rocks and a melitolite.

The structure contains isolated trisilicate rings (Si3O9)6-.

A possible Mn analogue, UM1975-18-SiO:Mn, the alpha phase of MnSiO3, is known to occur in limestones of Polish Tatra Mts.


Classification of PseudowollastoniteHide

'Grandfathered' (first described prior to 1959)
9.CA.20

9 : SILICATES (Germanates)
C : Cyclosilicates
A : [Si3O9]6- 3-membered single rings (dreier-Einfachringe), without insular complex anions

Pronounciation of PseudowollastoniteHide

Pronounciation:
PlayRecorded byCountry
Jolyon RalphUnited Kingdom

Physical Properties of PseudowollastoniteHide

Vitreous
Transparency:
Transparent
Comment:
Estimated from refractive indices

Chemical Properties of PseudowollastoniteHide

Formula:
CaSiO3

This formula only indicates the stoichiometry of the mineral. In order to reflect the structural units the mineral is composed of, the formula may also be written as Ca(Si3O9)0.33 or as Ca3(Si3O9).

Crystallography of PseudowollastoniteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Setting:
C2/c
Cell Parameters:
a = 6.83556(10) Å, b = 11.86962(18) Å, c = 19.6255(3) Å
α = 90°, β = 90.6805(13)°, γ = 90°
Ratio:
a:b:c = 0.576 : 1 : 1.653
Unit Cell V:
1592.22 ų
Z:
8
Morphology:
Platy on {001}
Twinning:
Polysynthetic, presumably || structural layers {001}
Comment:
Strongly pseudohexagonal metric; data is for 4M polytype (2M and 6-layer polytypes also known for synthetic analogue)

Occurrences of PseudowollastoniteHide

Paragenetic Mode(s):

Synonyms of PseudowollastoniteHide

Other Language Names for PseudowollastoniteHide

Related Minerals - Nickel-Strunz GroupingHide

9.CA.05BaziriteBaZr(Si3O9)Hex.
9.CA.05BenitoiteBaTi(Si3O9)Hex. 6 m2 : P62c
9.CA.05PabstiteBa(Sn,Ti)(Si3O9)Hex.
9.CA.10WadeiteK2Zr(Si3O9)Hex.
9.CA.15CalciocatapleiiteCaZr(Si3O9) · 2H2O
9.CA.15CatapleiiteNa2Zr(Si3O9) · 2H2OMon.
9.CA.25MargarosanitePb(Ca,Mn2+)2(Si3O9)Tric. 1 : P1
9.CA.25WalstromiteBaCa2(Si3O9)Tric.
9.CA.30Bobtraillite(Na,Ca)13Sr11(Zr,Y,Nb)14(Si3O9)10(H2BSi2O9)6 · 12H2OTrig. 3m (3 2/m) : P3 1c

Other InformationHide

Notes:
Lilac cathodoluminescence reported by Seryotkin et al. (2012)
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 PseudowollastoniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
McLintock, W.F.P. (1932) On the metamorphism produced by the combustion of hydrocarbons in the Tertiary sediments of south-west Persia. Mineralogical Magazine: 29: 93–106.
Tolliday, J.M. (1959) The crystal structure of β-wollastonite. Nature: 182: 1012.
Fleischer, M. (1973) New mineral names. Cyclowollastonite: American Mineralogist: 58: 560.
Gross, S. (1977) The mineralogy of the Hatrurim formation, Israel. Geological Survey of Israel Bulletin 70, 1–80. American Mineralogist (1999): 84: 929.
Courtial, P., Téqui, C., and Richet, P. (2000) Thermodynamics of diopside, anorthite, pseudowollastonite, CaMgGeO4 olivine, and åkermanite up to near the melting point. Physics and Chemistry of Minerals: 27: 242-250.
Bouhifd, M.A., Gruener, G., Mysen, B.O., and Richet, P. (2002) Premelting and calcium mobility in gehlenite (Ca2Al2SiO7) and parawollastonite (CaSiO3). Physics and Chemistry of Minerals: 29: 655-662.
Sokol, E.V., Novikov, I.S., Zateeva, S.N., Sharygin, V.V., Vapnik, Ye. (2008) Pyrometamorphic rocks of the spurrite–merwinite facies as indicators of discharge zones of hydrocarbons (the Hatrurim Formation, Israel). Doklady Earth Sciences: 420: 608–614.
Stoppa, F., Sharygin, V.V. (2009) Melilitolite intrusion and pelite digestion by high temperature kamafugitic magma at Colle Fabbri, Spoleto, Italy. Lithos: 112: 306–320.
Sokol, E., Novikov, I., Zateeva, S., Vapnik, Ye, Shagam, R., Kozmenko, O. (2010) Combustion metamorphism in Nabi Musa dome: new implications for a mud volcanic origin of the Mottled Zone, Dead Sea area. Basin Research: 22: 414–438.
Seryotkin, Yu.V., Sokol, E.V., Kokh, S.N. (2012): Natural pseudowollastonite: Crystal structure, associated minerals, and geological context. Lithos, 134-135, 75-90

Internet Links for PseudowollastoniteHide

Localities for PseudowollastoniteHide

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.
France
 
  • Occitanie
    • Aveyron
Kruszewski, Ł., Gatel, P., Thiéry, V., Moszumańska, I., Kusy, D. (2018)(?): Lapanouse-de-Sévérac (France): an example of unique crystallochemical behaviour of slag minerals and new mineral potential. Coal and Peat Fires, vol. 5, xx-xx (in review/correction); Ł. Kruszewski EPMA/PXRD/Rietveld data Boisson, J.-M., Leconte, J.(2018). Analyses 2017 MNHN-Micromonteurs. La Revue des Micromonteurs,27,3-33
Germany
 
  • Hesse
    • Richelsdorf District
      • Nentershausen
        • Süß
          • Richelsdorf Smelter
Andreas Gerstenberg collection
Israel
 
  • Negev
Gross, S. (1977): The Mineralogy of the Hatrurim Formation, Israel. Geological Survey of Israel, Bulletin no. 70, 80 pp.
Galuskina, I.O., Galuskin, E.V., Vapnik, Y., Prusik, K., Stasiak, M., Dzierżanowski, P., Murashko, M. (2017): Gurimite, Ba3(VO4)2, and hexacelsian, BaAl2Si2O8 – two new minerals from schorlomite-rich paralava of the Hatrurim Complex, Negev Desert, Israel. Mineralogical Magazine, 81, 1009-1019.
  • Southern District (HaDarom District)
Galuskin, E.V., Galuskina, I.O., Gfeller, F., Krüger, B., Kusz, J., Vapnik, Y., Dulski, M., Dzierżanowski, P. (2016): Silicocarnotite, Ca5[(SiO4)(PO4)](PO4), a new ‘old’ mineral from the Negev Desert, Israel, and the ternesite-silicocarnotite solid solution: indicators of high-temperature alteration of pyrometamorphic rocks of the Hatrurim Complex, Southern Levant. European Journal of Mineralogy: 28: 105-12.
Italy
 
  • Umbria
    • Perugia Province
      • Spoleto
Stoppa F., Sharygin V.V., 2009. Melilitolite intrusion and pelite digestion by high temperature kamafugitic magma at Colle Fabbri, Spoleto, Italy. Lithos, 112, 306-320.
Palestine
 
  • West Bank
    • Hatrurim Formation
Seryotkin, Yu.V., Sokol, E.V., Kokh, S.N. (2012): Natural pseudowollastonite: Crystal structure, associated minerals, and geological context. Lithos, 134-135, 75-90
USA
 
  • California
    • Tulare Co.
      • Sequoia National Park
        • Kaweah River
          • South Fork Kaweah River
Wenk, H.R. (1969) Polymorphism of Wollastonite. Contributons to Mineralogy and Petrology: 22: 238-247; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 407.
Mineral and/or Locality  
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