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Stalderite

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Big Photo

Lengenbach Quarry, Im Feld (Imfeld; Feld; Fäld), Binn Valley, Wallis (Valais), Switzerland
© Vincent Bourgoin 2012




Formula:
Tl(Cu,Ag)(Zn,Fe,Hg)
 
2
(As,Sb)
 
2
S
 
6
System:TetragonalColour:Black with a blue and ...
Hardness:3½ - 4
Name:
Named after Hans-Anton Stalder (1925-2011), curator, Natural History Museum, Bern and professor of mineralogy, University of Bern (Switzerland).
Isostructural with:Routhierite


The zinc analogue of routhierite.

Classification of Stalderite

IMA status:Approved 1987
Strunz 8th edition ID:2/E.12-25
Nickel-Strunz 10th (pending) edition ID:2.GA.40

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
G : Sulfarsenites, sulfantimonites, sulfbismuthites
A : Neso-sulfarsenites, etc. without additional S
Dana 8th edition ID:3.4.11.2

3 : SULFOSALTS
4 : ø = 3
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Type Occurrence of Stalderite

Type Locality:Lengenbach Quarry, Im Feld (Imfeld; Feld; Fäld), Binn Valley, Wallis (Valais), Switzerland
Year of Discovery:1987

Physical Properties of Stalderite

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Colour:Black with a blue and red iridescence
Streak:Brown-red
Hardness (Mohs):3½ - 4

Crystallography of Stalderite

Crystal System:Tetragonal

Chemical Properties of Stalderite

Formula:
Tl(Cu,Ag)(Zn,Fe,Hg)
 
2
(As,Sb)
 
2
S
 
6
Essential elements:As, Cu, S, Tl, Zn
All elements listed in formula:Ag, As, Cu, Fe, Hg, S, Sb, Tl, Zn

Relationship of Stalderite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
2.GA.05Proustite
Ag
 
3
AsS
 
3
2.GA.05Pyrargyrite
Ag
 
3
SbS
 
3
2.GA.10Pyrostilpnite
Ag
 
3
SbS
 
3
2.GA.10Xanthoconite
Ag
 
3
AsS
 
3
2.GA.15Samsonite
Ag
 
4
MnSb
 
2
S
 
6
2.GA.20Skinnerite
Cu
 
3
SbS
 
3
2.GA.20Wittichenite
Cu
 
3
BiS
 
3
2.GA.25Lapieite
NiCuSbS
 
3
2.GA.25Mückeite
NiCu(Bi,Sb)S
 
3
2.GA.25Malyshevite
PdCuBiS
 
3
2.GA.25Lisiguangite
PtCuBiS
 
3
2.GA.30Aktashite
Cu
 
6
Hg
 
3
As
 
4
S
 
12
2.GA.30Gruzdevite
Cu
 
6
Hg
 
3
Sb
 
4
S
 
12
2.GA.30Nowackiite
Cu
 
6
Zn
 
3
As
 
4
S
 
12
2.GA.35Laffittite
AgHgAsS
 
3
2.GA.40Routhierite
Tl(Cu,Ag)(Hg,Zn)
 
2
(As,Sb)
 
2
S
 
6
2.GA.45Erniggliite
Tl
 
2
SnAs
 
2
S
 
6
2.GA.50Bournonite
PbCuSbS
 
3
2.GA.50Seligmannite
PbCuAsS
 
3
2.GA.50Součekite
PbCuBi(S,Se)
 
3

Other Names for Stalderite

Synonyms:
IMA1987-024
Other Languages:
German:Stalderit
Simplified Chinese:斜硫砷铜汞矿
Spanish:Stalderita

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 Stalderite

Reference List:

- +
Schweizerische mineralogische und petrographische Mitteilungen (1995): 75: 337-345.

Mineralogical Record: 27: 466.

American Mineralogist (1996): 81: 1015.

Internet Links for Stalderite

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

    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
     
    • Wallis (Valais)
      • Binn Valley
        • Im Feld (Imfeld; Feld; Fäld)
    		Schweiz.Min.Petr.Mitt.(1995) 75
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