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Jaguéite

Formula:
Cu
 
2
Pd
 
3
Se
 
4
System:MonoclinicColour:Creamy yellowish
Hardness:5
Name:Named after the village of Jagüé, which is the closest settlement to El Chire, the mine where the mineral was discovered. Thus, the name should be Jagüéite.


Copper analogue of Chrisstanleyite

Occurs in a telethermal selenide vein-type deposit.

Classification of Jaguéite

IMA status:Approved 2002
Strunz 8th edition ID:2/A.06-28
Nickel-Strunz 10th (pending) edition ID:2.BC.15

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
B : Metal Sulfides, M: S > 1: 1 (mainly 2: 1)
C : With Rh, Pd, Pt, etc.
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Type Occurrence of Jaguéite

Type Locality:El Chire prospect, Jagué, La Rioja, Argentina
General Appearance of Type Material:anhedral grains that lack a distinct morphology. Aggregates of intergrown jaguéite and chrisstanleyite measure up to 100 × 20 µm; single grains, however, do not exceed 60 µm
Geological Setting of type material:A telethermal selenide vein-type deposit
Associated Minerals at type locality:
UmangiteTiemanniteNaumanniteKlockmanniteGold
ClausthaliteChrisstanleyiteBerzelianiteAguilariteAguilarite

Physical Properties of Jaguéite

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Colour:Creamy yellowish
Streak:Black
Hardness (Mohs):5
Hardness (Vickers):VHN25=464 - 772 kg/mm2
Tenacity:Brittle
Cleavage:None Observed
Fracture:Irregular/Uneven
Density (calculated):8.01 g/cm3

Crystallography of Jaguéite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:P21/b (P1 1 21/b) [P21/c] {P1 21/c 1} {P21/a}
Cell Parameters:a = 5.672Å, b = 9.91Å, c = 6.264Å
β = 115.4°
Ratio:a:b:c = 0.572 : 1 : 0.632
Unit Cell Volume:V 318.1 ų
Z:2
Twinning:Prominent spindle-shaped (almost identical to those in chrisstanleyite)
X-Ray Powder Diffraction:
d-spacingIntensity
2.776 (22)
2.759 (23)
2.676 (100)
2.630 (64)
2.508 (31)

Optical Data of Jaguéite

Type:Anisotropic
Anisotropism:moderate: brownish - bluish - greenish rotation tints
Bireflectance:Weak to moderate
Reflectivity:
460 nmR1=40.4%R2=48.4%
540 nmR1=44.2%R2=50.7%
580 nmR1=44.7%R2=50.6%
640 nmR1=45.1%R2=50.6%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 50.7%.
R1 shown in black, R2 shown in red
Colour in reflected light:buff to grey-green
Internal Reflections:not observed
Pleochroism:Weak
Comments:Light buff to creamy buff

Chemical Properties of Jaguéite

Formula:
Cu
 
2
Pd
 
3
Se
 
4
Essential elements:
All elements listed in formula:Cu, Pd, Se
Analyical Data:Forms a limited solid solution series with chrisstanleyite.
Relationship of Jaguéite to other Species
Related Minerals - Nickel-Strunz Grouping):
2.BC.05Palladseite
Pd
 
17
Se
 
15
2.BC.05Miassite
Rh
 
17
S
 
15
2.BC.10Oosterboschite
(Pd,Cu)
 
7
Se
 
5
2.BC.15Chrisstanleyite
Ag
 
2
Pd
 
3
Se
 
4
2.BC.20Keithconnite
Pd
 
3-x
Te (x = 0.14 - 0.43)
2.BC.25Vasilite
(Pd,Cu)
 
16
(S,Te)
 
7
2.BC.30Telluropalladinite
Pd
 
9
Te
 
4
2.BC.35Luberoite
Pt
 
5
Se
 
4
2.BC.40Oulankaite
(Pd,Pt)
 
5
(Cu,Fe)
 
4
SnTe
 
2
S
 
2
2.BC.45Telargpalite
(Pd,Ag)
 
3
(Te,Bi)
2.BC.50Temagamite
Pd
 
3
HgTe
 
3
2.BC.55Sopcheite
Ag
 
4
Pd
 
3
Te
 
4
2.BC.60Laflammeite
Pd
 
3
Pb
 
2
S
 
2
2.BC.65Tischendorfite
Pd
 
8
Hg
 
3
Se
 
9
Other Names for Jaguéite
Synonyms:
IMA2002-060
German names:
Jaguéit
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 Jaguéite
Reference List:Paar, W.H., Werner, H., Topa, D., Makovicky, E., Sureda, R.J., De Brodtkorb, M.K., Nickel, E.H., and Putz, H. (2004) Jagueite, Cu2Pd3Se4, a new mineral species from El Chire, La Rioja, Argentina. Canadian Mineralogist: 42(6): 1745-1755.
Internet Links for Jaguéite
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    Localities for Jaguéite
     		

    (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.

    Argentina
     
    

    • La Rioja
    

      • Jagué
    
    		Canadian Mineralogist (2004): 42(6): 1745-1755.
    Australia
     
    

    • Western Australia
    

      • Pilbara Region
    
    		The Canadian Mineralogist, Vol. 42, pp. 1745-1755 (2004)
    

    


    

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