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Pellyite

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Gunn Claim (Ross River), MacMillian Pass, Itsy Mts, Watson Lake Mining District, Yukon Territory, Canada
© Caltech

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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:Gunn Claim (Ross River), MacMillian Pass, Itsy Mts, 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
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
O
 
3
(Si
 
4
O
 
12
)
 
2
(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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    • External Links:
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  • Look for Pellyite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Pellyite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • Rare and Unusual minerals at Mineralogical Research Company
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  • Buy from David K Joyce minerals
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  • Find Pellyite on www.crystalclassics.co.uk
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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.
    Hide Locality List
    (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
        • Itsy Mts
          • MacMillian Pass
    		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.
        • Incline
          • Trumbull Peak
    		[MinRec 30:414]; Can.Min.22:653-658
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