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Stalderite

A valid IMA mineral species
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00307150017361049507554.jpg
Stalderite, etc.

Lengenbach Quarry, Fäld, Binn, Goms, Valais, Switzerland
07014050017272012626118.jpg
Stalderite

Lengenbach Quarry, Fäld, Binn, Goms, Valais, Switzerland
06153960017272012642574.jpg
Stalderite

Lengenbach Quarry, Fäld, Binn, Goms, Valais, Switzerland
02127430017271926701773.jpg
Stalderite, etc.

Lengenbach Quarry, Fäld, Binn, Goms, Valais, Switzerland
09726320017271926729284.jpg
Stalderite

Lengenbach Quarry, Fäld, Binn, Goms, Valais, Switzerland
06153960017272012642574.jpg
Stalderite

Lengenbach Quarry, Fäld, Binn, Goms, Valais, Switzerland
02127430017271926701773.jpg
Stalderite, etc.

Lengenbach Quarry, Fäld, Binn, Goms, Valais, Switzerland
09726320017271926729284.jpg
Stalderite

Lengenbach Quarry, Fäld, Binn, Goms, Valais, Switzerland
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About StalderiteHide

01623760017271926786408.jpg
Hans-Anton Stalder
Formula:
Tl(Cu,Ag)(Zn,Fe,Hg)2(As,Sb)2S6
Colour:
Black with a blue and red iridescence
Lustre:
Metallic
Hardness:
3½ - 4
Specific Gravity:
4.97 (Calculated)
Crystal System:
Tetragonal
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 and ferrostalderite.


Unique IdentifiersHide

Mindat ID:
3744
Long-form identifier:
mindat:1:1:3744:6

IMA Classification of StalderiteHide

Classification of StalderiteHide

Strunz-mindat (2026):
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 ed.:
3.4.11.2

3 : SULFOSALTS
4 : ø = 3

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference for Standard
SldIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of StalderiteHide

Lustre:
Metallic
Transparency:
Opaque
Colour:
Black with a blue and red iridescence
Streak:
Brown-red
Hardness:
3½ - 4 on Mohs scale
Hardness:
VHN10=132 - 138 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
4.97 g/cm3 (Calculated)

Optical Data of StalderiteHide

Anisotropism:
weak
Bireflectance:
none
Reflectivity:
WavelengthR1 (%)R2 (%)
480nm27.0%30.5%
546nm27.0%28.0%
589nm25.0%27.0%
656nm24.4%25.5%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 30.5%.
R1 shown in black, R2 shown in red
Colour in reflected light:
grayish white
Internal Reflections:
rare deep red

Chemistry of StalderiteHide

Mindat Formula:
Tl(Cu,Ag)(Zn,Fe,Hg)2(As,Sb)2S6
Element Weights:
Element% weight
Tl27.585 %
S25.966 %
As20.224 %
Zn17.648 %
Cu8.577 %

Calculated from ideal end-member formula.
Tl
S
As
Zn
Cu
Elements listed:
Ag, As, Cu, Fe, Hg, S, Sb, Tl, Zn - search for minerals with similar chemistry

Crystallography of StalderiteHide

Crystal System:
Tetragonal
Class (H-M):
42m - Scalenohedral
Space Group:
I42m
Cell Parameters:
a = 9.855(3) Å, c = 10.937(7) Å
Ratio:
a:c = 1 : 1.11
Unit Cell V:
1,062.21 ų (Calculated from Unit Cell)
Z:
4

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0015409StalderiteGraeser S, Schwander H, Wulf R, Edenharter A (1995) Stalderite TlCu(Zn,Fe,Hg)2As2S6 - a new mineral related to routhierite: description and crystal structure determination Schweizerische Mineralogische und Petrographische Mitteilungen 75 337-3451995Lengenbach, Binntal, Ct. Valais, Switzerland0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.086 Å(51)
3.417 Å(34)
1.940 Å(100)
2.541 Å(20)
2.436 Å(39)
1.8060 Å(22)
1.7431 Å(23)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
High-? alteration and/or metamorphism
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12])

Type Occurrence of StalderiteHide

Type Locality:
ⓘ Lengenbach Quarry, Fäld, Binn, Goms, Valais, Switzerland
General Appearance of Type Material:
Euhedral, pseudoisometric crystals to 0.5 mm.
Place of Conservation of Type Material:
Natural History Museum and Mineralogical Institute, University of Basel, Switzerland.
Associated Minerals at Type Locality:
HatchiteHutchinsoniteOrpimentRealgar
Reference:
Graeser, S., Schwander, H., Wulf, R. (1995): Stalderite TlCu(Zn,Fe,Hg)2As2S6 - a new mineral related to routhierite: description and crystal structure determination. Schweizerische mineralogische und petrographische Mitteilungen 75, 337-345

Synonyms of StalderiteHide

Other Language Names for StalderiteHide

German:Stalderit
Simplified Chinese:斜硫砷铜汞矿
Spanish:Stalderita

Relationship of Stalderite to other SpeciesHide

Member of:
Routhierite Group
Other Members of Routhierite Group:
ArsiccioiteAgHg2Tl(As,Sb)2S6Tet. 42m : I42m
FerrostalderiteCuFe2TlAs2S6Tet. 42m : I42m
RalphcannoniteAgZn2TlAs2S6Tet. 42m : I42m
RouthieriteTl(Cu,Ag)(Hg,Zn)2(As,Sb)2S6Tet. 42m : I42m
'Unnamed (Ag-Fe endmember of Routhierite Group)'AgFe2TlAs2S6

Common AssociatesHide

Associations Based on Photo Data:
4 photos of Stalderite associated with Tennantite SubgroupCu6(Cu4C2+2)As4S12S
2 photos of Stalderite associated with RealgarAs4S4
1 photo of Stalderite associated with HatchiteAgTlPbAs2S5
1 photo of Stalderite associated with DolomiteCaMg(CO3)2
1 photo of Stalderite associated with 'Tellurium-bearing Canfieldite'Ag8(Sn,Ge)(S,Te)6
1 photo of Stalderite associated with DufrénoysitePb2As2S5

Related Minerals - Strunz-mindat GroupingHide

2.GA.PyradoketositeAg3SbS3Mon. 2/m
2.GA.ArsiccioiteAgHg2Tl(As,Sb)2S6Tet. 42m : I42m
2.GA.EckeriteAg2CuAsS3Mon. 2/m : B2/b
2.GA.05ProustiteAg3AsS3Trig. 3m(32/m) : R3c
2.GA.05PyrargyriteAg3SbS3Trig. 3m : R3c
2.GA.10XanthoconiteAg3AsS3Mon. 2/m : B2/b
2.GA.10PyrostilpniteAg3SbS3Mon. 2/m : P21/b
2.GA.15SamsoniteAg4MnSb2S6Mon. 2/m : P21/m
2.GA.20BytíziteCu3SbSe3Orth. mmm(2/m2/m2/m) : Pnma
2.GA.20SkinneriteCu3SbS3Mon. 2/m : P21/b
2.GA.20WitticheniteCu3BiS3Orth. 222 : P212121
2.GA.25LapieiteNiCuSbS3Orth. 222 : P212121
2.GA.25LisiguangitePtCuBiS3Orth. 222 : P212121
2.GA.25MalyshevitePdCuBiS3Orth. mmm(2/m2/m2/m) : Pmmm
2.GA.25RoterbäritePdBiCuSe3Orth. 222 : P212121
2.GA.25MückeiteNiCu(Bi,Sb)S3Orth. 222 : P212121
2.GA.30AktashiteCu6Hg3As4S12Trig. 3 : R3
2.GA.30NowackiiteCu6Zn3As4S12Trig. 3 : R3
2.GA.30ZhengminghuaiteCu6Fe3As4S12Trig. 3 : R3
2.GA.30GruzdeviteCu6Hg3Sb4S12Trig. 3 : R3
2.GA.35LaffittiteAgHgAsS3Mon. 2/m
2.GA.40'Unnamed (Ag-Fe endmember of Routhierite Group)'AgFe2TlAs2S6
2.GA.40RouthieriteTl(Cu,Ag)(Hg,Zn)2(As,Sb)2S6Tet. 42m : I42m
2.GA.40RalphcannoniteAgZn2TlAs2S6Tet. 42m : I42m
2.GA.40FerrostalderiteCuFe2TlAs2S6Tet. 42m : I42m
2.GA.45ErniggliiteTl2SnAs2S6Trig. 3 : P3
2.GA.50CerromojoniteCuPbBiSe3Orth.
2.GA.50SeligmannitePbCuAsS3Orth. mmm(2/m2/m2/m) : Pmmn
2.GA.50SoučekiteCuPbBi(S,Se)3Orth. mm2
2.GA.50'Unnamed (Pb-Cu-Bi Selenide)'PbCuBiSe3
2.GA.50BournonitePbCuSbS3Orth. mm2 : Pmn21
2.GA.55EldragóniteCu6BiSe4(Se2) Orth. mmm(2/m2/m2/m)

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for StalderiteHide

References for StalderiteHide

Localities for StalderiteHide

Showing 2 localities.

This 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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Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Russia
 
  • Sverdlovsk Oblast
    • Serovsky District
      • Turya river
        • Tur'insk
Kasatkin et al. (2020) +1 other reference
Switzerland (TL)
 
  • Valais
    • Goms
      • Binn
        • Fäld
Graeser et al. (1995)
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