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Cupropearceite

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Big Photo

Sarbaiskoe deposit (Sarbai; Sarbay Mine), Kostanay Province (Qostanay Oblysy; Kostanai Oblast'), Kazakhstan
© Brent Thorne 2009




Formula:
[Cu
 
6
As
 
2
S
 
7
][Ag
 
9
CuS
 
4
]
System:Trigonal
Name:For its relationship to pearceite.


Polybasite group

Classification of Cupropearceite

IMA status:Approved 2007
Nickel-Strunz 10th (pending) edition ID:2.GB.15

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
G : Sulfarsenites, sulfantimonites, sulfbismuthites
B : Neso-sulfarsenites, etc. with additional S
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Type Occurrence of Cupropearceite

Type Locality:Sarbaiskoe deposit (Sarbai; Sarbay Mine), Kostanay Province (Qostanay Oblysy; Kostanai Oblast'), Kazakhstan

Crystallography of Cupropearceite

Crystal System:Trigonal
Class (H-M):3m (3 2/m) - Hexagonal Scalenohedral
Space Group:P3m1 {P3 2/m 1}
Cell Parameters:a = 7.3218Å, c = 11.8877Å
Ratio:a:c = 1 : 1.624
Unit Cell Volume:V 551.90 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
11.89 (54)
3.063 (38)
2.972 (100)
2.797 (44)
2.476 (45)
2.349 (45)
2.168 (42)
1.831 (50)

Chemical Properties of Cupropearceite

Formula:
[Cu
 
6
As
 
2
S
 
7
][Ag
 
9
CuS
 
4
]
Essential elements:Ag, As, Cu, S
All elements listed in formula:Ag, As, Cu, S

Relationship of Cupropearceite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
2.GB.05Argentotennantite
(Ag,Cu)
 
10
(Zn,Fe)
 
2
(As,Sb)
 
4
S
 
13
2.GB.05Freibergite
(Ag
 
4+2x
Cu
 
2-2x
)[(Cu, Ag)
 
4
(Fe, Zn)
 
2
]Sb
 
4
S
 
12
S
 
1-x
 (0 < x < 1)
2.GB.05Giraudite
(Cu,Zn,Ag)
 
12
(As,Sb)
 
4
(Se,S)
 
13
2.GB.05Goldfieldite
Cu
 
12
(Te,Sb,As)
 
4
S
 
13
2.GB.05Hakite
(Cu,Hg,Ag)
 
12
Sb
 
4
(Se,S)
 
13
2.GB.05Tennantite
(Cu,Ag,Fe,Zn)
 
12
As
 
4
S
 
13
2.GB.05Tetrahedrite
(Cu,Fe,Ag,Zn)
 
12
Sb
 
4
S
 
13
2.GB.10Selenostephanite
Ag
 
5
Sb(Se,S)
 
4
2.GB.10Stephanite
Ag
 
5
SbS
 
4
2.GB.15Pearceite
[(Ag,Cu)
 
6
(As,Sb)
 
2
S
 
7
][Ag
 
9
CuS
 
4
]
2.GB.15Polybasite
[(Ag,Cu)
 
6
(Sb,As)
 
2
S
 
7
][Ag
 
9
CuS
 
4
]
2.GB.15UM2003-14-S:AgBiFeTe
Ag
 
16
FeBiTe
 
3
S
 
8
2.GB.15Selenopolybasite
[(Ag,Cu)
 
6
(Sb,As)
 
2
(S,Se)
 
7
][Ag
 
9
Cu(S,Se)
 
2
Se
 
2
]
2.GB.15Cupropolybasite
[Cu
 
6
Sb
 
2
S
 
7
][Ag
 
9
CuS
 
4
]
2.GB.15UM1979-17-S:BiCuFe
Cu
 
18
Fe
 
4
BiS
 
16
2.GB.20Galkhaite
(Cs,Tl)(Hg,Cu,Zn)
 
6
(As,Sb)
 
4
S
 
12

Other Names for Cupropearceite

Synonyms:
IMA2007-046
Other Languages:

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 Cupropearceite

Reference List:

- +
Bindi, L., M. Evain, P.G. Spry, K.T. Tait, & S. Menchetti (2007): Structural role of copper in the minerals of the pearceite-polybasite group: the case of the new minerals cupropearceite and cupropolybasite. Mineralogical Magazine 71, 641-650.

Bindi, L. & Pekov, I.V. (2009): Crystal chemistry of extremely Cu-rich cupropearceite from the Sarbay mine, Northern Kazakhstan. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 5, 44-50.

Internet Links for Cupropearceite

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    • Localities for Cupropearceite

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    (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.
    Kazakhstan
     
    • Kostanay Province (Qostanay Oblysy; Kostanai Oblast')
    		Bindi, L.,et al., Mineralogical Magazine 71,641-650(2007)
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