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Baumhauerite-2a

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Quiruvilca Mine (La Libertad Mine; ASARCO Mine), Quiruvilca District, Santiago de Chuco Province, La Libertad Department, Peru
© J. Weissman

Formula:
Pb
 
11
Ag(As,Sb)
 
18
S
 
36
System:MonoclinicColour:Steel grey
Lustre:MetallicHardness:3
This page provides mineralogical data about Baumhauerite-2a.

Classification of Baumhauerite-2a

IMA status:Approved
Strunz 8th edition ID:2/E.24-15
Nickel-Strunz 10th (pending) edition ID:2.HC.05b

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
C : With only Pb
Hey's CIM Ref.:5.7.21

5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
7 : Sulpharsenites etc. of Pb and other metals
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Type Occurrence of Baumhauerite-2a

Type Locality:Lengenbach Quarry, Im Feld (Imfeld; Feld; Fäld), Binn Valley, Wallis (Valais), Switzerland

Physical Properties of Baumhauerite-2a

Lustre:Metallic
Colour:Steel grey
Streak:Reddish brown
Hardness (Mohs):3

Crystallography of Baumhauerite-2a

Crystal System:Monoclinic

Chemical Properties of Baumhauerite-2a

Formula:
Pb
 
11
Ag(As,Sb)
 
18
S
 
36
Essential elements:Ag, As, Pb, S
All elements listed in formula:Ag, As, Pb, S, Sb

Relationship of Baumhauerite-2a to other Species

Related Minerals - Nickel-Strunz Grouping):
2.HC.05bBaumhauerite
Pb
 
3
As
 
4
S
 
9
2.HC.05Dufrénoysite
Pb
 
2
As
 
2
S
 
5
2.HC.05aGuettardite
Pb(Sb,As)
 
2
S
 
4
2.HC.05Liveingite
Pb
 
9
As
 
13
S
 
28
2.HC.05Parapierrotite
Tl(Sb,As)
 
5
S
 
8
2.HC.05Pierrotite
Tl
 
2
Sb
 
6
As
 
4
S
 
16
2.HC.05Rathite
(Pb,Tl)
 
3
As
 
5
S
 
10
2.HC.05aSartorite
PbAs
 
2
S
 
4
2.HC.05aTwinnite
Pb(Sb,As)
 
2
S
 
4
2.HC.05Veenite
Pb
 
2
(Sb,As)
 
2
S
 
5
2.HC.05Marumoite
Pb
 
32
As
 
40
S
 
92
2.HC.15Boulangerite
Pb
 
5
Sb
 
4
S
 
11
2.HC.15Falkmanite
Pb
 
5.4
Sb
 
3.6
S
 
11
2.HC.15Plumosite
2.HC.20Robinsonite
Pb
 
4
Sb
 
6
S
 
13
2.HC.25Moëloite
Pb
 
6
Sb
 
6
S
 
14
(S
 
3
)
2.HC.30Dadsonite
Pb
 
23
Sb
 
25
S
 
60
Cl
2.HC.35Fülöppite
Pb
 
3
Sb
 
8
S
 
15
2.HC.35Heteromorphite
Pb
 
7
Sb
 
8
S
 
19
2.HC.35Owyheeite
Ag
 
2
Pb
 
5
Sb
 
6
S
 
15
2.HC.35Plagionite
Pb
 
5
Sb
 
8
S
 
17
2.HC.35Rayite
Pb
 
8
(Ag,Tl)
 
2
Sb
 
8
S
 
21
2.HC.35Semseyite
Pb
 
9
Sb
 
8
S
 
21
Related Minerals - Hey's Index Grouping:
5.7.1Seligmannite
PbCuAsS
 
3
5.7.2Bournonite
PbCuSbS
 
3
5.7.3Meneghinite
Pb
 
13
CuSb
 
7
S
 
24
5.7.4Gladite
PbCuBi
 
5
S
 
9
5.7.5Lindströmite
Pb
 
3
Cu
 
3
Bi
 
7
S
 
15
5.7.6Krupkaite
PbCuBi
 
3
S
 
6
5.7.7Hammarite
Pb
 
2
Cu
 
2
Bi
 
4
S
 
9
5.7.8Friedrichite
Pb
 
5
Cu
 
5
Bi
 
7
S
 
18
5.7.9Aikinite
PbCuBiS
 
3
5.7.10Nuffieldite
Pb
 
2
Cu(Pb,Bi)Bi
 
2
S
 
7
5.7.11Jaskólskiite
Pb
 
2+x
Cu
 
x
(Sb,Bi)
 
2-x
S
 
6
 x = 0.2
5.7.12Tintinaite
Pb
 
22
Cu
 
4
(Sb,Bi)
 
30
S
 
69
5.7.13Kobellite
Pb
 
22
Cu
 
4
(Bi,Sb)
 
30
S
 
69
5.7.14Proudite
CuPb
 
7.5
Bi
 
9.33
(S,Se)
 
22
5.7.15Nordströmite
CuPb
 
3
Bi
 
7
(Se
 
4
S
 
10
)
5.7.16Watkinsonite
Cu
 
2
PbBi
 
4
(Se,S,Te)
 
8
5.7.17Pekoite
PbCuBi
 
11
(S,Se)
 
18
5.7.18Petrovicite
Cu
 
3
HgPbBiSe
 
5
5.7.19Eclarite
(Cu,Fe)Pb
 
9
Bi
 
12
S
 
28
5.7.20Marrite
AgPbAsS
 
3
5.7.22Andorite
PbAgSb
 
3
S
 
6
5.7.23Ramdohrite
Ag
 
3
Pb
 
6
Sb
 
11
S
 
24
5.7.24Roshchinite
Ag
 
19
Pb
 
10
Sb
 
51
S
 
96
5.7.25Ourayite
Ag
 
3
Pb
 
4
Bi
 
5
S
 
13
5.7.26Eskimoite
Ag
 
7
Pb
 
10
Bi
 
15
S
 
36
5.7.27Fizélyite
Pb
 
14
Ag
 
5
Sb
 
21
S
 
48
 ?
5.7.28Owyheeite
Ag
 
2
Pb
 
5
Sb
 
6
S
 
15
5.7.29Freieslebenite
AgPbSbS
 
3
5.7.30Diaphorite
Ag
 
3
Pb
 
2
Sb
 
3
S
 
8
5.7.31Sterryite
Ag
 
2
Pb
 
10
(Sb,As)
 
12
S
 
29
5.7.32Vikingite
Ag
 
5
Pb
 
8
Bi
 
13
S
 
30
5.7.33Zoubekite
AgPb
 
4
Sb
 
4
S
 
10
5.7.34Schirmerite
AgPb
 
2
Bi
 
3
S
 
7
5.7.36Gustavite
Ag
 
3
Pb
 
5
Bi
 
11
S
 
24
5.7.37Kitaibelite
Ag
 
10
PbBi
 
30
S
 
51
5.7.38Treasurite
Ag
 
7
Pb
 
6
Bi
 
15
S
 
32
5.7.39Benjaminite
(Ag,Cu)
 
3
(Bi,Pb)
 
7
S
 
12
5.7.40Lengenbachite
(Ag,Cu)
 
2
Pb
 
6
As
 
4
S
 
13
5.7.41Berryite
Pb
 
3
(Ag,Cu)
 
5
Bi
 
7
S
 
16
5.7.42Neyite
Pb
 
7
(Cu,Ag)
 
2
Bi
 
6
S
 
17
5.7.43Larosite
(Cu,Ag)
 
21
(Pb,Bi)
 
2
S
 
13
5.7.44Cupropavonite
AgCu
 
2
PbBi
 
5
S
 
10
5.7.45Padĕraite
Cu
 
5.9
Ag
 
1.3
Pb
 
1.6
Bi
 
11.2
S
 
22
5.7.46Rayite
Pb
 
8
(Ag,Tl)
 
2
Sb
 
8
S
 
21
5.7.47Rathite
(Pb,Tl)
 
3
As
 
5
S
 
10
5.7.48Hatchite
(PbTl)
 
2
AgAs
 
2
S
 
3

Other Names for Baumhauerite-2a

Synonyms:
IMA1988-051
German names:
Baumhauerit-2a

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 Baumhauerite-2a

Reference List:Pring, A., Birch, W. D., Sewell, D., Graeser, S., Edenharter, A. & Criddle, A. (1990): Baumhauerite-2a: A silver-bearing mineral with baumhauerite-like supercell from Lengenbach, Switzerland. American Mineralogist: 75, 915-922.

American Mineralogist (1994): 79: 302-307.

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    Localities for Baumhauerite-2a

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    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.
    Peru
     
    • La Libertad Department
      • Santiago de Chuco Province
        • Quiruvilca District
    		Min.Rec. 28, #4 (1997)
    Switzerland
     
    • Wallis (Valais)
      • Binn Valley
        • Im Feld (Imfeld; Feld; Fäld)
    		[Am Min 75 (1990), 915; Clark, 1993 - "Hey's Mineral Index", p62]
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