Quadratite
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Formula:
Ag(Cd,Pb)AsS3
System:
Tetragonal
Colour:
Gray; reddish (laminae)
Lustre:
Metallic
Hardness:
3
Name:
The name is derived from the conspicuous quadratic shape of the mineral.
Classification of Quadratite
Approved
2/E.07-60
2.GC.25
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
G : Sulfarsenites, sulfantimonites, sulfbismuthites
C : Poly-sulfarsenites
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
G : Sulfarsenites, sulfantimonites, sulfbismuthites
C : Poly-sulfarsenites
Physical Properties of Quadratite
Metallic
Diaphaneity (Transparency):
Translucent, Opaque
Colour:
Gray; reddish (laminae)
Streak:
Reddish-brown
Hardness (Mohs):
3
Chemical Properties of Quadratite
Formula:
Ag(Cd,Pb)AsS3
Crystallography of Quadratite
Crystal System:
Tetragonal
Type Occurrence of Quadratite
Relationship of Quadratite to other Species
| 2.GC.05 | Hatchite | AgPbTlAs2S5 |
| 2.GC.05 | Wallisite | CuPbTlAs2S5 |
| 2.GC.10 | Sinnerite | Cu6As4S9 |
| 2.GC.15 | Watanabeite | Cu4As2S5 |
| 2.GC.20 | Simonite | TlHgAs3S6 |
| 2.GC.25 | Manganoquadratite | AgMnAsS3 |
| 2.GC.30 | Smithite | AgAsS2 |
| 2.GC.35 | Trechmannite | AgAsS2 |
| 2.GC.40a | Aleksite | PbBi2Te2S2 |
| 2.GC.40b | Kochkarite | PbBi4Te7 |
| 2.GC.40c | Poubaite | PbBi2(Se,Te,S)4 |
| 2.GC.40c | Rucklidgeite | PbBi2Te4 |
| 2.GC.40e | Babkinite | Pb2Bi2(S,Se)3 |
| 2.GC.40d | Saddlebackite | Pb2Bi2Te2S3 |
| 2.GC.45 | Tvalchrelidzeite | Hg3SbAsS3 |
| 2.GC.50 | Mutnovskite | Pb2AsS3I |
Other Names for Quadratite
Name in Other Languages:
German:Quadratit
Spanish:Quadratita
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
References for Quadratite
Reference List:
Graeser, S., Lustenhouwer, W., Berlepsch, P. (1998): Quadratite Ag(Cd,Pb)(As,Sb)S3 - a new sulfide mineral from Lengenbach, Binntal (Switzerland). Schweizerische Mineralogische und Petrographische Mitteilungen 78, 489-494.
Bindi, L., Spry, P. G., Bonazzi, P., Makovicky, E., Balić-Žunić, T. (2013): Quadratite, AgCdAsS3:Chemical composition, crystal structure and OD character. American Mineralogist 98, 242-247.
Bindi, L., Spry, P. G., Bonazzi, P., Makovicky, E., Balić-Žunić, T. (2013): Quadratite, AgCdAsS3:Chemical composition, crystal structure and OD character. American Mineralogist 98, 242-247.
Internet Links for Quadratite
mindat.org URL:
https://www.mindat.org/min-7262.html
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Localities for Quadratite
This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the 
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(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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 (TL) | |
| [AmMin 85:264] |
Lengenbach Quarry, Fäld, Binn Valley, Wallis, Switzerland