Pellyite Mineral Data + 
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- 78.6.3.1 Pellyite Ba2Ca(Fe,Mg)2Si6O17 C mcm 2/m 2/m 2/m
- VIII/F.30-10 Zektzerite NaLiZrSi6O15 C mca 2/m 2/m 2/m
- VIII/F.30-20 Tuhualite [](Na,K)FeFe[Si6O15] C mca 2/m 2/m 2/m
- VIII/F.30-30 Pellyite Ba2Ca(Fe,Mg)2Si6O17 C mcm 2/m 2/m 2/m
General Pellyite Information |
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 Chemical Formula: |
Ba2Ca(Fe++,Mg)2Si6O17 | ||
| Composition: |
Molecular Weight = 841.70 gm | ||
| Barium 32.63 % Ba 36.43 % BaO | |||
| Calcium 4.76 % Ca 6.66 % CaO | |||
| Magnesium 2.31 % Mg 3.83 % MgO | |||
| Iron 7.96 % Fe 10.24 % FeO | |||
| Silicon 20.02 % Si 42.83 % SiO2 | |||
| Oxygen 32.31 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Ba2CaFe2+1.2Mg0.8Si6O17 | ||
| Environment: |
Contact metasomatic deposit. | ||
| IMA Status: |
Approved IMA 1972 | ||
| Locality: |
Pelly and Ross River, Yukon Territories, Canada. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for the locality. | ||
| Synonym: |
ICSD 12135 | ||
| IMA1970-035 | |||
| PDF 25-95 | |||
Pellyite Image | |||
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Images:
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Images:
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Pellyite Crystallography |
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| Axial Ratios: |
a:b:c =2.1922:1:1.9869 | ||
| Cell Dimensions: |
a = 15.677, b = 7.151, c = 14.209, Z = 4; V = 1,592.92 Den(Calc)= 3.51 | ||
| Crystal System: |
Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: C mcm | ||
| X Ray Diffraction: |
By Intensity(I/Io): 3.43(1), 3.19(0.65), 2.308(0.6), | ||
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Crystal Structure:
Mouse |
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Physical Properties of Pellyite |
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| Cleavage: |
[???] Indistinct, [???] Indistinct | ||
| Color: |
Colorless, Light yellow. | ||
| Density: |
3.51 | ||
| Diaphaniety: |
Translucent | ||
| Fracture: |
Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz). | ||
| Habit: |
Massive - Uniformly indistinguishable crystals forming large masses. | ||
| Hardness: |
6 - Orthoclase | ||
| Luster: |
Vitreous (Glassy) | ||
| Streak: |
white | ||
Optical Properties of Pellyite |
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| Gladstone-Dale: |
CI meas= -0.041 (Good) - where the CI = (1-KPDmeas/KC) CI calc= -0.041 (Good) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.184,KPDmeas= 0.184,KC= 0.1766 |
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| Optical Data: |
Biaxial (+), a=1.643, b=1.645, g=1.649, bire=0.0060, 2V(Calc)=72, 2V(Meas)=47. Dispersion very strong, r > v. | ||
Calculated Properties of Pellyite |
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| Electron Density: |
relectron=3.28 gm/cc |
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| Fermion Index |
Fermion Index = 0.07172 Boson Index = 0.92828 |
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| Photoelectric: |
PEPellyite = 144.10 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Pellyite is Not Radioactive |
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Pellyite Classification |
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| Dana Class: |
78.6.3.1 (78)Unclassified silicates | ||
| (78.6)possible tectosilicates | |||
| (78.6.3)Dana Group | |||
| Strunz Class: |
VIII/F.30-30 VIII - Silicates | ||
| VIII/F - Inosilicates (chain and band) Six chains [Si6O18]12- and six bands [Si12O30]12- | |||
| VIII/F.30 - Zektzerite - Pellyite series | |||
Other Pellyite Information |
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| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8) | ||
| See Also: |
Links to other databases for Pellyite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - CalTech Mineral Spectroscopy 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 - WWW-MINCRYST 15 -École des Mines de Paris Search for Pellyite using: Visit our Advertisers for Pellyite : Translate Pellyite Mineral Data : Ask about Pellyite here : Print or Cut-and-Paste your Pellyite Specimen Label here :
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