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General Wollastonite-1A Information |
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 Chemical Formula: |
CaSiO3 | ||
| Composition: |
Molecular Weight = 116.16 gm | ||
| Calcium 34.50 % Ca 48.28 % CaO | |||
| Silicon 24.18 % Si 51.72 % SiO2 | |||
| Oxygen 41.32 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
CaSiO3 | ||
| IMA Status: |
Valid Species (Pre-IMA) 1818 | ||
| Locality: |
Link to MinDat.org Location Data. | ||
| Name Origin: |
Named after the English mineralogist and chemist, W. H. Wollaston (1766-1828). | ||
| Name Pronunciation: |
Wollastonite-1A + Pronunciation  |
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| Synonym: |
Wollastonite | ||
| Wollastonite-1T | |||
Wollastonite-1A Image | |||
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Images:
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Images:
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Wollastonite-1A Crystallography |
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| Axial Ratios: |
a:b:c =1.0846:1:0.9658 | ||
| Cell Dimensions: |
a = 7.94, b = 7.32, c = 7.07, Z = 6; alpha = 90.033°, beta = 95.367°, gamma = 103.433° V = 397.92 Den(Calc)= 2.91 | ||
| Crystal System: |
Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1 | ||
| X Ray Diffraction: |
By Intensity(I/Io): 3.314(1), 3.83(0.85), 3.52(0.8), | ||
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Crystal Structure:
Mouse |
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Physical Properties of Wollastonite-1A |
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| Cleavage: |
{100} Perfect, {102} Good, {001} Good | ||
| Color: |
White, Yellow, Gray, Red, Brown. | ||
| Density: |
2.8 - 2.9, Average = 2.84 | ||
| Diaphaneity: |
Subtransparent to translucent | ||
| Fracture: |
Splintery - Thin, elongated fractures produced by intersecting good cleavages or partings (e.g. hornblende). | ||
| Habit: |
Massive - Fibrous - Distinctly fibrous fine-grained forms. | ||
| Habit: |
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite) | ||
| Hardness: |
5 - Apatite | ||
| Luster: |
Vitreous - Silky | ||
| Streak: |
white | ||
Optical Properties of Wollastonite-1A |
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| Gladstone-Dale: |
CI meas= -0.074 (Fair) - where the CI = (1-KPDmeas/KC) CI calc= -0.052 (Good) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2198,KPDmeas= 0.2244,KC= 0.209 Ncalc = 1.59 - 1.61 |
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| Optical Data: |
Biaxial (-), a=1.615-1.646, b=1.627-1.659, g=1.629-1.662, bire=0.0140-0.0160, 2V(Calc)=44-50, 2V(Meas)=40. Dispersion r > v distinct. | ||
Calculated Properties of Wollastonite-1A |
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| Electron Density: |
Bulk Density (Electron Density)=2.91 gm/cc note: Specific Gravity of Wollastonite-1A =2.91 gm/cc. |
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| Fermion Index: |
Fermion Index = 0.01 Boson Index = 0.99 |
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| Photoelectric: |
PEWollastonite-1A = 5.15 barns/electron U=PEWollastonite-1A x rElectron Density= 14.97 barns/cc. |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Wollastonite-1A is Not Radioactive |
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Wollastonite-1A Classification |
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| Dana Class: |
65.02.01.01a (65)Inosilicate Single-Width Unbranched Chains, W=1 | ||
| (65.02)with chains P=3 | |||
| (65.02.01)Wollastonite group | |||
| Strunz Class: |
09.DG.05 09 - SILICATES (Germanates) | ||
| 09.D - Inosilicates* Structural terminology according to Liebau (1985) | |||
| 09.DG -Inosilicates with 3-periodic single and multiple chains | |||
Other Wollastonite-1A Information |
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| References: |
NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990;Dana8) OPTIC PROP.(Heinrich65) | ||
| See Also: |
Links to other databases for Wollastonite-1A : 1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - GeoScienceWorld 5 - Google Images 6 - Google Scholar 7 - MinDAT 8 - Mineralienatlas (Deutsch) 9 - Online Mineral Museum 10 - QUT Mineral Atlas 11 - Ruff.Info 12 - University of Colorado - Mineral Structure Data Search for Wollastonite-1A using: Visit our Advertisers for Wollastonite-1A : A Bijoux Google Search for Wollastonite-1AAdam's Minerals Google Search for Wollastonite-1A Cape Minerals Google Search for Wollastonite-1A Dakota Matrix Minerals Google Search for Wollastonite-1A Excalibur Mineral Corp. Google Search for Wollastonite-1A Exceptional Minerals Google Search for Wollastonite-1A John Betts Fine Minerals Search for Wollastonite-1A McDougall Minerals Google Search for Wollastonite-1A Mineral News Website Link Rock and Mineral Shows Google Search for Wollastonite-1A Weinrich Minerals, Inc. Google Search for Wollastonite-1A Ask about Wollastonite-1A here : Print or Cut-and-Paste your Wollastonite-1A Specimen Label here :
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