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Wollastonite-1A

A structural variant of Wollastonite
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02193100014961679127526.jpg
Wollastonite-1A

In-Ko-Pah Gorge, Boulder Park, Imperial County, California, USA
05008420014947805396199.jpg
Wollastonite-1A, etc.

Mount Somma, Somma-Vesuvius Complex, Naples, Campania, Italy
08375980016561727464260.jpg
Wollastonite-1A

In-Ko-Pah Gorge, Boulder Park, Imperial County, California, USA
08827970014962807701513.jpg
Wollastonite-1A

In-Ko-Pah Gorge, Boulder Park, Imperial County, California, USA
05008420014947805396199.jpg
Wollastonite-1A, etc.

Mount Somma, Somma-Vesuvius Complex, Naples, Campania, Italy
08390110016561535798584.jpg
Wollastonite-1A

In-Ko-Pah Gorge, Boulder Park, Imperial County, California, USA
02193100014961679127526.jpg
Wollastonite-1A

In-Ko-Pah Gorge, Boulder Park, Imperial County, California, USA
05008420014947805396199.jpg
Wollastonite-1A, etc.

Mount Somma, Somma-Vesuvius Complex, Naples, Campania, Italy
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About Wollastonite-1AHide

Formula:
CaSiO3
Lustre:
Vitreous
Hardness:
5
Crystal System:
Triclinic
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

Originally described from Dognecea (Dognaczka; Dognacska), Banat, Caras-Severin Co., Romania.


Unique IdentifiersHide

Mindat ID:
7369
Long-form identifier:
mindat:1:1:7369:7
GUID
(UUID V4):
df7c75a2-730d-41b1-9bbf-ed621daefa13

Classification of Wollastonite-1AHide

Strunz-mindat (2023):
9.DG.05

9 : SILICATES (Germanates)
D : Inosilicates
G : Inosilicates with 3-periodic single and multiple chains
Dana 8th ed.:
65.2.1.1a

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

Physical Properties of Wollastonite-1AHide

Lustre:
Vitreous
Hardness:
5 on Mohs scale

Optical Data of Wollastonite-1AHide

Type:
Biaxial (-)
RI values:
nα = 1.615 - 1.646 nβ = 1.627 - 1.659 nγ = 1.629 - 1.662
2V:
Measured: 40° , Calculated: 44° to 50°
Max Birefringence:
δ = 0.014 - 0.016
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r > v distinct

Chemical Properties of Wollastonite-1AHide

Formula:
CaSiO3
Elements listed:
Ca, O, Si - search for minerals with similar chemistry

Crystallography of Wollastonite-1AHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 7.94 Å, b = 7.32 Å, c = 7.07 Å
α = 90.03°, β = 95.37°, γ = 103.43°
Ratio:
a:b:c = 1.085 : 1 : 0.966
Unit Cell V:
397.82 ų (Calculated from Unit Cell)
Z:
6

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.314 Å(100)
3.83 Å(84)
3.51 Å(77)
3.086 Å(58)
2.302 Å(52)
2.556 Å(44)
1.759 Å(35)

Synonyms of Wollastonite-1AHide

Other Language Names for Wollastonite-1AHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Wollastonite-1A associated with VesuvianiteCa19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9

Related Minerals - Strunz-mindat GroupingHide

9.DG.CalcinaksiteKNaCa(Si4O10) · H2OTric. 1 : P1
9.DG.Barrydawsonite-(Y)Na1.5Y0.5CaSi3O8(OH)Mon. 2/m : P21/b
9.DG.ParatobermoriteCa4(Al0.5Si0.5)2Si4O16(OH)(H2O)2 · (Ca · 3H2O)Mon. 2/m
9.DG.02SteedeiteNaMn2[Si3BO9](OH)2Tric. 1 : P1
9.DG.02NolzeiteNaMn2[Si3BO9](OH)2 · 2H2OTric. 1 : P1
9.DG.05BustamiteCaMn2+(Si2O6)Tric. 1 : P1
9.DG.05FerrobustamiteCaFe2+(Si2O6)Tric. 1
9.DG.05PectoliteNaCa2Si3O8(OH)Tric. 1 : P1
9.DG.05SeranditeNaMn2+2Si3O8(OH)Tric. 1 : P1
9.DG.05WollastoniteCa3(Si3O9)Tric. 1 : P1
9.DG.05TanohataiteLiMn2Si3O8(OH)Tric. 1 : P1
9.DG.05SchizoliteNaCaMnSi3O8(OH)Tric. 1 : P1
9.DG.05MurakamiiteLiCa2Si3O8(OH)Tric. 1 : P1
9.DG.05DalnegorskiteCa5Mn(Si3O9)2Tric. 1 : P1
9.DG.07CascanditeCaScSi3O8(OH)Tric. 1
9.DG.08Plombièrite[Ca4Si6O16(OH)2 · 2H2O] · (Ca · 5H2O)Orth.
9.DG.10Clinotobermorite[Ca4Si6O17 · 2H2O] · (Ca · 3H2O)Mon.
9.DG.10RiversideiteCa5(HSi3O9)2 · 2H2OOrth.
9.DG.10TobermoriteCa4Si6O17(H2O)2 · (Ca · 3H2O)Mon. 2 : P21
9.DG.12JusiteNa2Ca15Al4Si16O54 · 17H2O
9.DG.12KenotobermoriteCa4Si6O15(OH)2(H2O)2 · 3H2OMon.
9.DG.15FoshagiteCa4(Si3O9)(OH)2Tric. 1 : P1
9.DG.20JenniteCa9(Si3O9)2(OH)8 · 8H2OTric. 1 : P1
9.DG.20KameneviteK2TiSi3O9 · H2OOrth. 2 2 2 : P21 21 21
9.DG.25ParaumbiteK3Zr2H(Si3O9)2 · nH2OOrth. mm2
9.DG.25UmbiteK2(Zr,Ti)Si3O9 · H2OOrth. 2 2 2 : P21 21 21
9.DG.30SørenseniteNa4SnBe2Si6O16(OH)4Mon. 2/m : B2/b
9.DG.32Escheite Ca2NaMnTi5[Si12O34]O2(OH)3 · 12H2OOrth. mm2 : Ama2
9.DG.35XonotliteCa6(Si6O17)(OH)2Mon. 2/m : B2/m
9.DG.40HillebranditeCa2(SiO3)(OH)2Orth. mmm (2/m 2/m 2/m) : Cmcm
9.DG.45ZoriteNa8(Ti,Nb)5(Si6O17)2(OH,O)5 · 14H2OOrth.
9.DG.45ChivruaiiteCa4(Ti,Nb)5(Si6O17)2(OH,O)5 · 13-14H2OOrth. mmm (2/m 2/m 2/m) : Cmmm
9.DG.50Haineaultite(Na,Ca)5Ca(Ti,Nb)5(Si6O17)2(OH,F)8 · 5H2OOrth. 2 2 2 : C2 2 2
9.DG.55EpididymiteNa2Be2Si6O15 · H2OOrth. mmm (2/m 2/m 2/m) : Pnma
9.DG.60EudidymiteNa2Be2Si6O15 · H2OMon. 2/m : B2/b
9.DG.65ElpiditeNa2ZrSi6O15 · 3H2OOrth.
9.DG.65PatyniteNaKCa4[Si9O23]Tric. 1 : P1
9.DG.67WhelaniteCu2+2Ca6[Si6O17(OH)](CO3)(OH)3 · 2H2OOrth. mm2 : Pnn2
9.DG.70Fenaksite(K,Na)4(Fe,Mn)2(Si4O10)2(OH,F)Tric. 1 : P1
9.DG.70LitidioniteCuNaKSi4O10Tric. 1 : P1
9.DG.70ManaksiteKNaMnSi4O10Tric. 1 : P1
9.DG.70YusupoviteNa2Zr(Si6O15) · 2.5H2OMon. 2/m : B2/m
9.DG.75TinaksiteK2Na(Ca,Mn2+)2TiO[Si7O18(OH)]Tric.
9.DG.75TokkoiteK2Ca4[Si7O18(OH)](OH,F)Tric.
9.DG.75SenkevichiteCsKNaCa2TiO[Si7O18](OH)Tric. 1 : P1
9.DG.80CanasiteK3Na3Ca5Si12O30(OH)4Mon. m : Bm
9.DG.80FluorcanasiteK3Na3Ca5Si12O30F4 · H2OMon. m : Bm
9.DG.85MiseriteK1.5-x(Ca,Y,REE)5(Si6O15)(Si2O7)(OH,F)2 · yH2OTric.
9.DG.90FrankameniteK3Na3Ca5(Si12O30)(F,OH)4 · H2OTric. 1 : P1
9.DG.92Charoite(K,Sr)15-16(Ca,Na)32[Si6O11(O,OH)6]2[Si12O18(O,OH)12]2[Si17O25(O,OH)18]2(OH,F)4 · ~3H2OMon. 2/m : P21/m
9.DG.95YuksporiteK4(Ca,Na)14(Sr,Ba)2(◻,Mn,Fe)(Ti,Nb)4(O,OH)4(Si6O17)2(Si2O7)3(H2O,OH)3Mon. 2/m : P21/m
9.DG.97Eveslogite(Na,K,Ca,Sr,Ba)48 [(Ti,Nb,Mn,Fe2+)12Si48O144(OH)12](F,OH,Cl)14Mon. 2/m : P2/m

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-1AHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Inst. Geol. (1818) 3, 198
Mineral. J. (1973) 7, 180

Internet Links for Wollastonite-1AHide

Localities for Wollastonite-1AHide

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 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.
Italy
 
  • Campania
    • Naples
      • Somma-Vesuvius Complex
Van King; www.dinet.it/Mineral-GMC/AMI/vesuvio.html.
Japan
 
  • Hiroshima Prefecture
    • Shoubara City
Henmi, C., Kawahara, A., Henmi, K., Kusachi, I., Takeuchi, Y. (1983) The 3T, 4T and 5T polytypes of wollastonite from Kushiro, Hiroshima Prefecture, Japan. American Mineralogist: 68: 156-163.
Mexico
 
  • Chihuahua
    • Pueblito de Allende
www.lpi.usra.edu/meetings/metsoc2002/pdf/5053.pdf.
Romania
 
  • Caraş-Severin County
Klaproth, M.H. (1802): Chemische Untersuchung des Tafelspaths, Beiträge zur chemischen Kenntniss der Mineralkörper, Dritter Band, Rottmann Berlin, 289-291
USA
 
  • Alaska
    • Prince of Wales-Hyder Census Area
      • Ketchikan Mining District
PXRD by John Attard (Attard XRD Services, San Diego).
  • California
    • Imperial County
      • Boulder Park
University of Arizona Mineral Museum 12446.
    • Riverside County
      • Crestmore
[micromounts@yahoogroups.com]
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