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Pizgrischite

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Piz Grisch, Ferrera Valley, Hinterrhein Valley, Grischun (Grisons; Graubünden), Switzerland
© 2008, JGW

Show Pizgrischite Photos (4)



Formula:
Cu
 
17
Bi
 
17
S
 
35
System:MonoclinicColour:Lead grey
Lustre:Metallic
Name:Named after type locality.


Pizgrischite belongs to the cuprobismutite series of bismuth sulfosalts but, sensu stricto, it is not a homologue of cuprobismutite.

Classification of Pizgrischite

IMA status:Approved 2001
Nickel-Strunz 10th (pending) edition ID:2.JA.10d

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
J : Sulfosalts of PbS archetype
A : Galena derivatives with little or no Pb
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Type Occurrence of Pizgrischite

Type Locality:Piz Grisch, Ferrera Valley, Hinterrhein Valley, Grischun (Grisons; Graubünden), Switzerland
General Appearance of Type Material:Thin lead-grey blades up to 1 cm, embedded in quartz.
Geological Setting of type material:Quartz vein embedded in gneisses.
Associated Minerals at type locality:
TetrahedriteSphaleritePyriteEmplectiteChalcopyrite
Aikinite-Bismuthinite Series

Physical Properties of Pizgrischite

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Colour:Lead grey
Tenacity:Brittle
Cleavage:Perfect
Perfect on (001) and well-developed on (010)

Crystallography of Pizgrischite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:B2/m {B1 1 2/m} {C2/m} {C1 2/m 1}
Cell Parameters:a = 35.054Å, b = 3.91123Å, c = 43.192Å
β = 96.713°
Ratio:a:b:c = 8.962 : 1 : 11.043
Unit Cell Volume:V 5,881.21 ų (Calculated from Unit Cell)
Twinning:Abundant polysynthetic twinning on (010).
X-Ray Powder Diffraction:
d-spacingIntensity
5.36 (40)
4.08 (50)
3.904 (37)
3.585 (34)
3.120 (40)
3.104 (68)
2.759 (53)
2.752 (44)
1.956(100)

Optical Data of Pizgrischite

Type:Anisotropic
Anisotropism:Weak
Reflectivity:
460 nmR1=40.6%R2=42%
540 nmR1=41.1%R2=43%
580 nmR1=41.1%R2=43.15%
640 nmR1=40.9%R2=43.4%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 43.4%.
R1 shown in black, R2 shown in red
Colour in reflected light:Dark Brown (in oil with ND=1.515)
Internal Reflections:none observed

Chemical Properties of Pizgrischite

Formula:
Cu
 
17
Bi
 
17
S
 
35
Essential elements:Bi, Cu, S
All elements listed in formula:Bi, Cu, S

Relationship of Pizgrischite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
2.JA.05eBenjaminite
(Ag,Cu)
 
3
(Bi,Pb)
 
7
S
 
12
2.JA.05gBorodaevite
Ag
 
5
(Bi,Pb,Fe)
 
8
(Sb,Bi)
 
2
S
 
17
2.JA.05aCupropavonite
AgCu
 
2
PbBi
 
5
S
 
10
2.JA.05aKitaibelite
Ag
 
10
PbBi
 
30
S
 
51
2.JA.05iLivingstonite
HgSb
 
4
S
 
8
2.JA.05dMakovickyite
Ag
 
1.5
Bi
 
5.5
S
 
9
2.JA.05fMummeite
(Cu,Ag)
 
3-4
(Bi,Pb)
 
7-8
S
 
13
2.JA.05aPavonite
(Ag,Cu)(Bi,Pb)
 
3
S
 
5
2.JA.05bGrumiplucite
HgBi
 
2
S
 
4
2.JA.05hMozgovaite
PbBi
 
4
(S,Se)
 
7
2.JA.05dCupromakovickyite
Cu
 
8
Pb
 
4
Ag
 
2
Bi
 
18
S
 
36
2.JA.05cKudriavite
(Cd,Pb)Bi
 
2
S
 
4
2.JA.05aCupromakopavonite
Ag
 
3
Cu
 
8
Pb
 
4
Bi
 
19
S
 
38
2.JA.05Dantopaite
Cu
 
1.06
Ag
 
4.24
Pb
 
0.9
Bi
 
12.23
S
 
21.89
Te
 
0.11
2.JA.10aCuprobismutite
Cu
 
8
AgBi
 
12
S
 
24
2.JA.10cHodrušite
Cu
 
8
Bi
 
12
S
 
22
2.JA.10ePadĕraite
Cu
 
5.9
Ag
 
1.3
Pb
 
1.6
Bi
 
11.2
S
 
22
2.JA.10bKupčíkite
(Cu,Fe)
 
4
Bi
 
5
S
 
10
2.JA.15Schapbachite
AgBiS
 
2
2.JA.15Cuboargyrite
AgSbS
 
2
2.JA.20Bohdanowiczite
AgBiSe
 
2
2.JA.20Matildite
AgBiS
 
2
2.JA.20Volynskite
AgBiTe
 
2

Other Names for Pizgrischite

Synonyms:
IMA2001-002
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 Pizgrischite

Reference List:

- +
The Canadian Mineralogist; October 2007; v. 45; no. 5; p. 1229-1245

Roth, Ph. (2007): Minerals first discovered in Switzerland and minerals named after Swiss individuals. Philippe Roth, Ed., Zurich, 239 pp.

Meisser, N., Schenk, K., Berlepsch, P., Brugger, J., Bonin, M., Criddle, A. J., Thelin, P., Bussy, F. (2007): Pizgrischite, (Cu,Fe)Cu14PbBi17S35, a new sulfosalt from the Swiss Alps: description, crystal structure and occurrence. Canadian Mineralogist 45, 1229-1245.

Meisser, N. (2007): Ein neues Mineral aus Graubünden. Schweizer Strahler, 2/2007, 14-17.

Internet Links for Pizgrischite

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    • Localities for Pizgrischite

    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.
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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.
    Switzerland
     
    • Grischun (Grisons; Graubünden)
      • Hinterrhein Valley
        • Ferrera Valley
    		Roth, Ph. (2007): Minerals first discovered in Switzerland and minerals named after Swiss individuals. Philippe Roth, Ed., Zurich, 239 pp.; Meisser, N., Schenk, K., Berlepsch, P., Brugger, J., Bonin, M., Criddle, A. J., Thelin, P., Bussy, F. (2007): Pizgrischite, (Cu,Fe)Cu14PbBi17S35, a new sulfosalt from the Swiss Alps: description, crystal structure and occurrence. Canadian Mineralogist 45, 1229-1245.
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