Wilkinsonite Mineral Data + 
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- 69.2.1a.1 Aenigmatite Na2Fe5TiSi6O20 P1 1
- 69.2.1a.2 Dorrite Ca2Mg2Fe4(Al,Fe)4Si2O20 P1,P 1 Tri
- 69.2.1a.3 Hogtuvaite (Ca,Na)2(Fe,Fe,Ti,Mg,Mn)6(Si,Be,Al)6O20 P1 1
- 69.2.1a.4 Krinovite NaMg2CrSi3O10 P1 1
- 69.2.1a.5 Rhonite Ca2(Mg,Fe,Fe,Ti)6(Si,Al)6O20 P1 1
- 69.2.1a.6 Serendibite Ca2(Mg,Al)6(Si,Al,B)6O20 P1 1
- 69.2.1a.7 Welshite Ca2Mg4(Mn,Fe)Sb2O2[Si3Be2O18] P1 1
- 69.2.1a.8 Wilkinsonite Na2Fe4Fe2Si6O20 P1 1
- 69.2.1a.9 IMA2002-009a! Ca2Fe4FeTiSi4BeAlO20 P1 1
- VIII/F.14-10 Krinovite NaMg2CrSi3O10 P1 1
- VIII/F.14-20 Aenigmatite Na2Fe5TiSi6O20 P1 1
- VIII/F.14-30 Wilkinsonite Na2Fe4Fe2Si6O20 P1 1
- VIII/F.14-35 Hogtuvaite (Ca,Na)2(Fe,Fe,Ti,Mg,Mn)6(Si,Be,Al)6O20 P1 1
- VIII/F.14-40 Dorrite Ca2Mg2Fe4(Al,Fe)4Si2O20 P1,P 1 Tri
- VIII/F.14-50 Rhonite Ca2(Mg,Fe,Fe,Ti)6(Si,Al)6O20 P1 1
- VIII/F.14-60 Serendibite Ca2(Mg,Al)6(Si,Al,B)6O20 P1 1
- VIII/F.14-70 Welshite Ca2Mg4(Mn,Fe)Sb2O2[Si3Be2O18] P1 1
General Wilkinsonite Information |
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 Chemical Formula: |
Na2Fe++4Fe+++2Si6O20 | ||
| Composition: |
Molecular Weight = 869.56 gm | ||
| Sodium 5.29 % Na 7.13 % Na2O | |||
| Iron 38.53 % Fe 33.05 % FeO / 18.36 % Fe2O3 | |||
| Silicon 19.38 % Si 41.46 % SiO2 | |||
| Oxygen 36.80 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Na2Fe2+4Fe3+2Si6O20 | ||
| IMA Status: |
Approved IMA 1990 | ||
| Locality: |
Link to MinDat.org Location Data. | ||
| Synonym: |
IMA1988-053 | ||
Wilkinsonite Image | |||
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Images:
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Wilkinsonite Crystallography |
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| Axial Ratios: |
a:b:c =0.9577:1:0.8237 | ||
| Cell Dimensions: |
a = 10.355, b = 10.812, c = 8.906, Z = 2; alpha = 105.05°, beta = 96.63°, gamma = 125.2° V = 781.57 Den(Calc)= 3.69 | ||
| Crystal System: |
Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1 | ||
| X Ray Diffraction: |
By Intensity(I/Io): 3.149(1), 8.1(1), 2.696(0.8), | ||
Physical Properties of Wilkinsonite |
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| Color: |
Black. | ||
| Diaphaniety: |
Subtransparent to Opaque | ||
| Hardness: |
5 - Apatite | ||
| Luster: |
Vitreous (Glassy) | ||
| Streak: |
brown | ||
Optical Properties of Wilkinsonite |
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| Optical Data: |
Biaxial (+), a=1.79, b=1.79, g=1.9, bire=0.1100, 2V(Calc)=0, 2V(Meas)=10. | ||
Calculated Properties of Wilkinsonite |
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| Electron Density: |
relectron=3.58 gm/cc |
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| Fermion Index |
Fermion Index = 0.01739 Boson Index = 0.98261 |
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| Photoelectric: |
PEWilkinsonite = 12.38 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Wilkinsonite is Not Radioactive |
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Wilkinsonite Classification |
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| Dana Class: |
69.2.1a.8 (69)Inosilicate Chains with Side Branches or Loops | ||
| (69.2)with P>2 | |||
| (69.2.1a)Aenigmatite and related species (Aenigmatite subgroup) | |||
| Strunz Class: |
VIII/F.14-30 VIII - Silicates | ||
| VIII/F - Inosilicates (chain and band) modified double chains | |||
| VIII/F.14 - Aenigmatite group | |||
Other Wilkinsonite Information |
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| References: |
PHYS. PROP.(Am.Min.,Vol.75,p694-701,1990) OPTIC PROP.(Am.Min.,Vol.75,p694-701,1990) | ||
| See Also: |
Links to other databases for Wilkinsonite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (MinSocAm) 8 -Handbook of Mineralogy (UofA) 9 -MinDAT 10 -MinMax(Deutsch) 11 -MinMax(English) 12 -Mineralienatlas (Deutsch) 13 -QUT Mineral Atlas 14 -École des Mines de Paris Search for Wilkinsonite using: Visit our Advertisers for Wilkinsonite : Translate Wilkinsonite Mineral Data : Ask about Wilkinsonite here : Print or Cut-and-Paste your Wilkinsonite Specimen Label here :
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