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Pellyite

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Formula:
Ba
 
2
Ca(Fe,Mg)
 
2
Si
 
6
O
 
17
System:OrthorhombicHardness:6
Name:After the type locality, the Pelly River, Yukon Territory, Canada.
This page provides mineralogical data about Pellyite.

Classification of Pellyite

IMA status:Approved
Strunz 8th edition ID:8/F.30-30
Nickel-Strunz 10th (pending) edition ID:9.DO.10

9 : SILICATES (Germanates)
D : Inosilicates
O : Inosilicates with 7-, 8-, 10-, 12- and 14-periodic chains
Dana 8th edition ID:78.6.3.1

78 : Unclassified Silicates
6 :
Hey's CIM Ref.:14.7.9

14 : Silicates not Containing Aluminum
7 : Silicates of Ba, Sr and Zn
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Type Occurrence of Pellyite

Type Locality:Gun claim (Gunn claim), Wilson lake, Itsi Mt., Watson Lake Mining District, Yukon Territory, Canada
Year of Discovery:1971

Physical Properties of Pellyite

Hardness (Mohs):6

Crystallography of Pellyite

Crystal System:Orthorhombic
Cell Parameters:a = 14.2Å, b = 15.67Å, c = 7.15Å
Ratio:a:b:c = 0.906 : 1 : 0.456
Unit Cell Volume:V 1,590.98 ų (Calculated from Unit Cell)

Optical Data of Pellyite

Type:Biaxial (+)
RI values: nα = 1.643 nβ = 1.645 nγ = 1.649
2V:Measured: 47° , Calculated: 72°
Maximum Birefringence:δ = 0.006

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:very strong

Chemical Properties of Pellyite

Formula:
Ba
 
2
Ca(Fe,Mg)
 
2
Si
 
6
O
 
17
Simplified for copy/paste:Ba2Ca(Fe,Mg)2Si6O17
Essential elements:Ba, Ca, Fe, O, Si
All elements listed in formula:Ba, Ca, Fe, Mg, O, Si
Common Impurities:Al,Mn,Zn

Relationship of Pellyite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.DO.05Pyroxferroite
(Fe,Mn,Ca)SiO
 
3
9.DO.05Pyroxmangite
MnSiO
 
3
9.DO.15Nordite-(Ce)
(Ce,La)(Sr,Ca)Na
 
2
(Na,Mn)(Zn,Mg)Si
 
6
O
 
17
9.DO.15Nordite-(La)
(La,Ce)(Sr,Ca)Na
 
2
(Na,Mn)(Zn,Mg)Si
 
6
O
 
17
9.DO.15Ferronordite-(Ce)
Na
 
3
SrCeFe
2+
 
Si
 
6
O
 
17
9.DO.15Manganonordite-(Ce)
Na
 
3
SrCeMn
2+
 
Si
 
6
O
 
17
9.DO.15Ferronordite-(La)
Na
 
3
Sr(La,Ce)FeSi
 
6
O
 
17
9.DO.20Alamosite
Pb
 
12
[Si
 
12
O
 
36
]
9.DO.25Liebauite
Ca
 
3
Cu
 
5
Si
 
9
O
 
26
Related Minerals - Hey's Index Grouping:

- +
14.7.1Sanbornite
Ba
 
2
(Si
 
4
O
 
10
)
14.7.2Krauskopfite
BaSi
 
2
O
 
5
· 3H
 
2
O
14.7.3Walstromite
BaCa
 
2
(Si
 
3
O
 
9
)
14.7.4Macdonaldite
BaCa
 
4
Si
 
16
O
 
36
(OH)
 
2
· 10H
 
2
O
14.7.5Ericssonite
BaMn
2+
2
Fe
3+
 
(Si
 
2
O
 
7
)O(OH)
14.7.6Ericssonite-2O
BaMn
2+
2
Fe
3+
 
(Si
 
2
O
 
7
)O(OH)
14.7.7Gillespite
BaFe
2+
 
[Si
 
4
O
 
10
]
14.7.8Andrémeyerite
BaFe
2+
2
(Si
 
2
O
 
7
)
14.7.10Taikanite
Sr
 
3
BaMn
2+
2
(Si
 
4
O
 
12
)O
 
2
14.7.11Willemite
Zn
 
2
SiO
 
4
14.7.12Hemimorphite
Zn
 
4
Si
 
2
O
 
7
(OH)
 
2
· H
 
2
O
14.7.13Zincsilite
Zn
 
3
(Si
 
4
O
 
10
)(OH)
 
2
· 4H
 
2
O
14.7.14Hardystonite
Ca
 
2
Zn(Si
 
2
O
 
7
)
14.7.15Petedunnite
Ca(Zn,Mn
2+
 
,Mg,Fe
2+
 
)Si
 
2
O
 
6
14.7.16Clinohedrite
CaZn(SiO
 
4
) · H
 
2
O
14.7.17Junitoite
CaZn
 
2
Si
 
2
O
 
7
· H
 
2
O
14.7.18Larsenite
PbZnSiO
 
4
14.7.19Esperite
PbCa
 
2
Zn
 
3
(SiO
 
4
)
 
3
14.7.20Hodgkinsonite
Mn
2+
 
Zn
 
2
(SiO
 
4
)(OH)
 
2
14.7.21Gerstmannite
MnMgZn(SiO
 
4
)(OH)
 
2
14.7.22Gageite
Mn
 
21
(Si
 
4
O
 
12
)
 
2
O
 
3
(OH)
 
20
14.7.23Franklinfurnaceite
Ca
 
2
Fe
3+
 
Mn
2+
3
Mn
3+
 
(Zn
 
2
Si
 
2
O
 
10
)(OH)
 
8

Other Names for Pellyite

Synonyms:
IMA1970-035
Other Languages:
German:Pellyit
Russian:Пеллиит
Spanish:Pellyita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Pellyite

Reference List:

- +
MONTGOMERY, J.H., THOMPSON, R.M. & MEAGHER, E.P. (1972): Pellyite, a new barium silicate mineral from the Yukon Territory. Canadian Mineralogist 11, 444-447.
MEAGHER, E.P. (1976): The atomic arrangement of pellyite: Ba2Ca(Fe,Mg)2Si6O17. American Mineralogist 61, 67-73.
PABST, A. & HARRIS, J. (1984): Pellyite: new localities and new data. Canadian Mineralogist 22, 653-658.

Internet Links for Pellyite

Search Engines:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Pellyite details from Handbook of Mineralogy (PDF)
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  • Localities for Pellyite

    The 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.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Canada
     
    • Yukon Territory
      • Watson Lake Mining District
        • Itsi Mt.
          • Wilson lake
    CanMin:11:444; Can.Min.22:653-658; Alfors, J.T. & Pabst, A. (1984): Titanian taramellites in western North America, American Mineralogist, 69, 358-373.
    Mexico
     
    • Baja California (Baja California Norte; BC Norte)
      • Tres Pozos
    Can.Min.22:653-658; American Mineralogist, Volume 69, pages 358-373, 1984
    USA
     
    • California
      • Fresno Co.
        • Big Creek-Rush Creek District
          • Rush Creek deposit
            • Big Creek
    Canadian Mineralogist (2001): 39:1053-1058.
    Pabst, Adolf (1978) Zur morphologie des taramellits. Tschermaks Mineralogische und Petrographische Mitteilungen: 25: 248; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 465; Canadian Mineralogist: (1973): 11: 444; Canadian Mineralogist (1984): 22: 653-658.
      • Mariposa Co.
        • El Portal
          • Eagle Peak [1]
    [MinRec 30:414]; Can.Min.22:653-658
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    Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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