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Lengenbachite

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

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Formula:
(Ag,Cu)
 
2
Pb
 
6
As
 
4
S
 
13
System:TriclinicColour:Steel-gray, iridescent ...
Hardness:1 - 2
Name:
From the type locality, the Lengenbach quarry, Binntal, Valais, Switzerland.
This page provides mineralogical data about Lengenbachite.

Classification of Lengenbachite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:2/E.15-50
Nickel-Strunz 10th (pending) edition ID:2.HF.30

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
F : With SnS and PbS archetype structure units
Dana 8th edition ID:3.3.7.1

3 : SULFOSALTS
3 : 3 <ø < 4
Hey's CIM Ref.:5.7.40

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 Lengenbachite

Type Locality:Lengenbach Quarry, Im Feld (Imfeld; Feld; Fäld), Binn Valley, Wallis (Valais), Switzerland
Year of Discovery:1904

Physical Properties of Lengenbachite

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Colour:Steel-gray, iridescent tarnish at times
Streak:Black
Hardness (Mohs):1 - 2
Tenacity:Malleable
Density (measured):5.8 - 5.85 g/cm3

Crystallography of Lengenbachite

Crystal System:Triclinic

Optical Data of Lengenbachite

Type:Anisotropic
Anisotropism:Weak

Chemical Properties of Lengenbachite

Formula:
(Ag,Cu)
 
2
Pb
 
6
As
 
4
S
 
13
Essential elements:Ag, As, Pb, S
All elements listed in formula:Ag, As, Cu, Pb, S
Common Impurities:Fe,Sb

Relationship of Lengenbachite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
2.HF.20Vrbaite
Tl
 
4
Hg
 
3
Sb
 
2
As
 
8
S
 
20
2.HF.25aCylindrite
Pb
 
3
Sn
 
4
FeSb
 
2
S
 
14
2.HF.25bFranckeite
Fe
2+
 
(Pb,Sn
2+
 
)
 
6
Sn
4+
2
Sb
 
2
S
 
14
2.HF.25bIncaite
(Pb,Ag)
 
4
Sn
 
4
FeSb
 
2
S
 
13
2.HF.25aLévyclaudite
Pb
 
8
Sn
 
7
Cu
 
3
(Bi,Sb)
 
3
S
 
28
2.HF.25bPotosíite
Pb
 
6
Sn
 
3
FeSb
 
3
S
 
16
2.HF.25bCoiraite
(Pb,Sn)
 
12.5
Sn
 
5
FeAs
 
3
S
 
28
2.HF.25aAbramovite
Pb
 
2
SnInBiS
 
7
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
5.7.21Baumhauerite-2a
Pb
 
11
Ag(As,Sb)
 
18
S
 
36
5.7.22Andorite
PbAgSb
 
3
S
 
6
5.7.23Ramdohrite
(Cd,Mn,Fe)Ag
 
5.5
Pb
 
12
Sb
 
21.5
S
 
48
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
Ag
 
5
Pb
 
14
Sb
 
21
S
 
48
5.7.28Owyheeite
Ag
 
3+x
Pb
 
10-2x
Sb
 
11+x
S
 
28
, -0.13 < x > +0.20
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
5.7.41Berryite
Pb
 
3
(Ag,Cu)
 
5
Bi
 
7
S
 
16
5.7.42Neyite
Ag
 
2
Cu
 
6
Pb
 
25
Bi
 
26
S
 
68
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
 
8
Pb
 
4-x
(Tl
 
2
As
 
2
)
 
x
(Ag
 
2
As
 
2
)As
 
16
S
 
40
5.7.48Hatchite
AgTlPbAs
 
2
S
 
5

Other Names for Lengenbachite

Other Languages:
German:Lengenbachit
Spanish:Lengenbachita

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 Lengenbachite

Reference List:

- +
Solly (1904), Nature: 71: 118.

Solly (1905), Mineralogical Magazine: 14: 78.

Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 398.

Neues Jahrbuch für Mineralogie, Monatshefte (1968): 69-75.

Neues Jahrbuch für Mineralogie, Abhandlungen (1994): 166: 169-191.

Internet Links for Lengenbachite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Lengenbachite details from Handbook of Mineralogy (PDF)
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    • Localities for Lengenbachite

    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.
    Switzerland
     
    • Wallis (Valais)
      • Binn Valley
        • Binn
    		Cannon, R., Hensel, H. & Raber, T. (2008): Der Reckibach-Dolomit im Binntal, Schweiz: Mineralbestand und Neufunde. Lapis, 33 (3), 20-28; 50. (in German)
        • Im Feld (Imfeld; Feld; Fäld)
    		Nature (1904) 71, 118 and Min.Mag.(1905) 14, 72-82 (p. 78)
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    Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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