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Quadratite

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Big Photo

Lengenbach Quarry, Im Feld (Imfeld; Feld; Fäld), Binn Valley, Wallis (Valais), Switzerland
© Stephan Wolfsried

Show Quadratite Photos (16)



Formula:
Ag(Cd,Pb)AsS
 
3
System:TetragonalColour:Gray; reddish (laminae)
Lustre:MetallicHardness:3
Name:The name is derived from the conspicuous quadratic shape of the mineral.


The Cd analogue of manganoquadratite.

Classification of Quadratite

IMA status:Approved
Strunz 8th edition ID:2/E.07-60
Nickel-Strunz 10th (pending) edition ID:2.GC.25

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
G : Sulfarsenites, sulfantimonites, sulfbismuthites
C : Poly-sulfarsenites
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Type Occurrence of Quadratite

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

Physical Properties of Quadratite

Lustre:Metallic
Diaphaneity (Transparency):Translucent, Opaque
Colour:Gray; reddish (laminae)
Streak:Reddish-brown
Hardness (Mohs):3

Crystallography of Quadratite

Crystal System:Tetragonal

Chemical Properties of Quadratite

Formula:
Ag(Cd,Pb)AsS
 
3
Essential elements:Ag, As, Cd, S
All elements listed in formula:Ag, As, Cd, Pb, S

Relationship of Quadratite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
2.GC.05Hatchite
AgTlPbAs
 
2
S
 
5
2.GC.05Wallisite
(Cu,Ag)TlPbAs
 
2
S
 
5
2.GC.10Sinnerite
Cu
 
6
As
 
4
S
 
9
2.GC.15Watanabeite
Cu
 
4
(As,Sb)
 
2
S
 
5
2.GC.20Simonite
TlHgAs
 
3
S
 
6
2.GC.25Manganoquadratite
AgMnAsS
 
3
2.GC.30Smithite
AgAsS
 
2
2.GC.35Trechmannite
AgAsS
 
2
2.GC.40aAleksite
PbBi
 
2
Te
 
2
S
 
2
2.GC.40bKochkarite
PbBi
 
4
Te
 
7
2.GC.40cPoubaite
PbBi
 
2
(Se,Te,S)
 
4
2.GC.40cRucklidgeite
(Bi,Pb)
 
3
Te
 
4
2.GC.40eBabkinite
Pb
 
2
Bi
 
2
(S,Se)
 
3
2.GC.40dSaddlebackite
Pb
 
2
Bi
 
2
Te
 
2
S
 
3
2.GC.45Tvalchrelidzeite
Hg
 
3
SbAsS
 
3
2.GC.50Mutnovskite
Pb
 
4
As
 
2
S
 
6
ICl

Other Names for Quadratite

Synonyms:
IMA1994-038
Other Languages:
German:Quadratit
Spanish:Quadratita

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 Quadratite

Reference List:

- +
Schweizerische mineralogische und petrographische Mitteilungen: 78: 489-494.

Internet Links for Quadratite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Quadratite details from Handbook of Mineralogy (PDF) [Link dead]
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    • Localities for Quadratite

    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)
    		[AmMin 85:264]
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