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Muthmannite

Formula:
(Ag,Au)Te
Hardness:2½
Name:For German chemist and crystallographer, Professor Friedrich Wilhelm Muthmann (1861-1913), of Munich.
This page provides mineralogical data about Muthmannite.

Classification of Muthmannite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:2/B.07-70
Nickel-Strunz 10th (pending) edition ID:2.CB.85

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
C : Metal Sulfides, M: S = 1: 1 (and similar)
B : With Zn, Fe, Cu, Ag, etc.
Hey's CIM Ref.:3.3.8

3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
3 : Sulphides etc. of Au
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Type Occurrence of Muthmannite

Type Locality:Sacarîmb (Sãcãrâmb; Szekerembe; Nagyág), Hunedoara Co., Romania
Year of Discovery:1911

Physical Properties of Muthmannite

Hardness (Mohs):2½

Chemical Properties of Muthmannite

Formula:
(Ag,Au)Te
Essential elements:Ag, Te
All elements listed in formula:Ag, Au, Te
Common Impurities:Pb,Sb,S

Relationship of Muthmannite to other Species

Related Minerals - Nickel-Strunz Grouping):
2.CB.05Coloradoite
HgTe
2.CB.05Hawleyite
CdS
2.CB.05Metacinnabar
HgS
2.CB.05Polhemusite
(Zn,Hg)S
2.CB.05Sakuraiite
(Cu,Zn,Fe)
 
3
(In,Sn)S
 
4
2.CB.05Sphalerite
(Zn,Fe
2+
 
)S
2.CB.05Stilleite
ZnSe
2.CB.05Tiemannite
HgSe
2.CB.05Rudashevskyite
(Fe,Zn)S
2.CB.10Chalcopyrite
CuFeS
 
2
2.CB.10Eskebornite
CuFeSe
 
2
2.CB.10Gallite
CuGaS
 
2
2.CB.10Haycockite
Cu
 
4
Fe
 
5
S
 
8
2.CB.10Lenaite
AgFeS
 
2
2.CB.10Mooihoekite
Cu
 
9
Fe
 
9
S
 
16
2.CB.10Putoranite
Cu
 
9
Fe
 
9
S
 
16
2.CB.10Roquesite
CuInS
 
2
2.CB.10Talnakhite
Cu
 
9
(Fe,Ni)
 
8
S
 
16
2.CB.10Laforêtite
AgInS
 
2
2.CB.15Černýite
Cu
 
2
(Cd,Zn,Fe)SnS
 
4
2.CB.15Ferrokësterite
Cu
 
2
(Fe,Zn)SnS
 
4
2.CB.15Hocartite
Ag
 
2
(Fe
2+
 
,Zn)SnS
 
4
2.CB.15Idaite
Cu
 
5
FeS
 
6
2.CB.15Kësterite
Cu
 
2
(Zn,Fe)SnS
 
4
2.CB.15Kuramite
Cu
 
3
SnS
 
4
2.CB.15Mohite
Cu
 
2
SnS
 
3
2.CB.15Pirquitasite
Ag
 
2
ZnSnS
 
4
2.CB.15Stannite
Cu
 
2
(Fe,Zn)SnS
 
4
2.CB.15Stannoidite
Cu
+
6
Cu
2+
2
(Fe
2+
 
,Zn)
 
3
Sn
 
2
S
 
12
2.CB.15Velikite
(Cu,Hg)
 
11
Sn
 
4
S
 
16
2.CB.20Chatkalite
Cu
 
6
FeSn
 
2
S
 
8
2.CB.20Mawsonite
Cu
 
6
Fe
 
2
SnS
 
8
2.CB.30Colusite
Cu
 
26
V
 
2
(As,Sn,Sb)
 
6
S
 
32
2.CB.30Germanite
Cu
 
13
Fe
 
2
Ge
 
2
S
 
16
2.CB.30Germanocolusite
Cu
 
26
V
 
2
(Ge,As)
 
6
S
 
32
2.CB.30Nekrasovite
Cu
 
26
V
 
2
(Sn,As,Sb)
 
6
S
 
32
2.CB.30Stibiocolusite
Cu
 
13
V
 
4
(Sb,Sn,As)
 
3
S
 
16
2.CB.30Ovamboite
Cu
 
20
(Fe,Cu,Zn)
 
6
W
 
2
Ge
 
6
S
 
32
2.CB.30Maikainite
Cu
 
20
(Fe,Cu)
 
6
Mo
 
2
Ge
 
6
S
 
32
2.CB.35Hemusite
Cu
 
6
SnMoS
 
8
2.CB.35Kiddcreekite
Cu
 
6
SnWS
 
8
2.CB.35Polkovicite
(Fe,Pb)
 
3
(Ge,Fe)
 
1-x
S
 
4
2.CB.35Renierite
(Cu,Zn)
 
11
(Ge,As)
 
2
Fe
 
4
S
 
16
2.CB.35Vinciennite
Cu
+
7
Cu
2+
3
Fe
2+
2
Fe
3+
2
Sn(As,Sb)S
 
16
2.CB.35Morozeviczite
(Pb,Fe)
 
3
Ge
 
1-x
S
 
4
2.CB.35Catamarcaite
Cu
 
6
GeWS
 
8
2.CB.40Lautite
CuAsS
2.CB.45Cadmoselite
CdSe
2.CB.45Greenockite
CdS
2.CB.45Hypercinnabar
HgS
2.CB.45Wurtzite
(Zn,Fe)S
2.CB.45Rambergite
MnS
2.CB.55Cubanite
CuFe
 
2
S
 
3
2.CB.55Isocubanite
CuFe
 
2
S
 
3
2.CB.60Picotpaulite
TlFe
 
2
S
 
3
2.CB.60Raguinite
TlFeS
 
2
2.CB.65Argentopyrite
AgFe
 
2
S
 
3
2.CB.65Sternbergite
AgFe
 
2
S
 
3
2.CB.70Sulvanite
Cu
 
3
VS
 
4
2.CB.75Vulcanite
CuTe
2.CB.80Empressite
AgTe
Related Minerals - Hey's Index Grouping:
3.3.1Calaverite
AuTe
 
2
3.3.2Krennerite
(Au,Ag)Te
 
2
3.3.3Kostovite
CuAuTe
 
4
3.3.4Uytenbogaardtite
Ag
 
3
AuS
 
2
3.3.5Fischesserite
Ag
 
3
AuSe
 
2
3.3.6Petrovskaite
AuAg(S,Se)
3.3.7Petzite
Ag
 
3
AuTe
 
2
3.3.9Sylvanite
(Au,Ag)
 
2
Te
 
4
3.3.10Penzhinite
(Ag,Cu)
 
4
Au(S,Se)
 
4
3.3.11Bezsmertnovite
(Au,Ag)
 
4
Cu(Te,Pb)
3.3.12Bilibinskite
PbCuAu
 
3
Te
 
2
3.3.13Bogdanovite
(Au,Te,Pb)
 
3
(Cu,Fe)
3.3.14Montbrayite
(Au,Sb)
 
2
Te
 
3

Other Names for Muthmannite

German names:
Muthmannit
Russian names:
Мутманнит
Spanish names:
Muthmannita

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 Muthmannite

Reference List:Zambonini (1911), Zeitschrift für Kristallographie: 49: 246.

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: 260-261.

Doklady Akademii Nauk SSSR (1984): 280: 996.

Internet Links for Muthmannite

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    Localities for Muthmannite

    (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.
    Romania
     
    • Alba Co.
    		AmMin 89:1505–1509 (2004)
    • Hunedoara Co.
    		Transactions of the USSR Academy of Sc., volume 280, pp. 159(1985)
    Mineral and/or Locality
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