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Stalderite

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 (b. 1925), 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, 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
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

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  • Raman and XRD data at RRUFF project
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  • Stalderite details from Handbook of Mineralogy (PDF)
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    Localities for Stalderite

    Hide Locality List
    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.
    (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
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. 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. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 17th Nov 2009 01:25:32