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α-Brass

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Formula:
Cu
 
3
Zn
System:IsometricColour:yellow
Lustre:Metallic
Name:According to compositional similarity with technical brass - widespread zinc-copper alloy.


Copper-zinc intermetallide with composition very close to Cu3Zn (33.3 mas.% of Zn). Compare with Zincian Copper.

Classification of α-Brass

IMA status:Published without Approval
Strunz 8th edition ID:1/A.04-15
Nickel-Strunz 10th (pending) edition ID:1.AB.10a

1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
B : Zinc-brass family
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Physical Properties of α-Brass

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Colour:yellow
Streak:golden-yellow
Tenacity:Malleable
Cleavage:None Observed
Fracture:Irregular/Uneven

Crystallography of α-Brass

Crystal System:Isometric
Class (H-M):m3m (4/m 3 2/m) - Hexoctahedral

Optical Data of α-Brass

Type:Isotropic

Chemical Properties of α-Brass

Formula:
Cu
 
3
Zn
Simplified for copy/paste:Cu3Zn
Essential elements:Cu, Zn
All elements listed in formula:Cu, Zn

Relationship of α-Brass to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
1.AB.Magnesium
Mg
1.AB.05Cadmium
Cd
1.AB.05Rhenium
Re
1.AB.05Zinc
Zn
1.AB.05Titanium
Ti
1.AB.10bDanbaite
CuZn
 
2
1.AB.10aZhanghengite
CuZn
1.AB.10bTongxinite
Cu
 
2
Zn
1.AB.10aZinccopperite
Cu
 
7
Zn
 
4
(?)
1.AB.10UM2003-03-E:AgAuCuZn
(Cu,Au,Ag)
 
4
Zn
1.AB.10UM1980-01-E:CuZn
Cu
 
3
Zn
1.AB.10UM1980-02-E:CuZn
Cu
 
4.45
Zn

Other Names for α-Brass

Synonyms:
Brass
Other Languages:
French:Laiton
German:Messing
Russian:α-Латунь
Simplified Chinese:黄铜

Other Information

Magnetism:Paramagnetic
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 α-Brass

Reference List:

- +
Li, B., Xue, X., and Yi, S. (1989): Discovery of Cu3Zn in Kalatongke intrusion, Xinjiang. Geol. Lab. 5(4), 239-241 (in Chinese).

http://www.msm.cam.ac.uk/doitpoms/miclib/pds.swf?targetFrame=Cu-Zn [interactive Cu-Zn phase diagram]

Internet Links for α-Brass

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  • α-Brass specimens for sale - minfind.com
  • Localities for α-Brass

    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.
    Atlantic Ocean
     
    • Mid-Atlantic Ridge complex
      • Sierra Leone fracture zone
        • Markov Deep
    Sharkov, E.V., Abramov, S.S., Simonov, V.A., Krinov, D.I., Skolotnev, S.G., Bel’tenev, V.E., and Bortnikov, N.S. (2007): Geology of Ore Deposits 49(6), 467-486.
      • Trans-Atlantic Geotraverse hydrothermal field (TAG)
    Marine Geology 161 (1999) 229–245
    Chile
     
    • Atacama Region
      • Copiapó Province
        • Cachiyuyo de Llampos district
    Am Min 55:5-6 pp 1019-1021
    China
     
    • Xinjiang Autonomous Region
      • Yili Hasake Autonomous Prefecture (Ili Kazakh Autonomous Prefecture)
        • Aletai Prefecture (Altay Prefecture)
          • Fuyun Co. (Koktokay Co.)
    Li, B., Xue, X., and Yi, S. (1989): Geol. Lab. 5(4), 239-241.
    Finland
     
    • Western and Inner Finland Region
      • Sastamala
        • Suodenniemi
    Knauf, V., Sandberg, E., Sokolov, P. and Tabuns, E. 2000. Gold geochemistry and mineralogy of till. A new approach for data integration. bulletin of the Geological Society of Finland Volume 72 (1-2) 57-69.
    Japan
     
    • Honshu Island
      • Kanto Region
        • Kanagawa Prefecture
          • Hakone-machi
    (Alleged in field trip guide notes.)
    • Tokyo Metropolis
      • Izu Archipelago
    Nishida, et al (1994) Naturwissenschaften, 81, 498-502.
    Alfredo Petrov specimens
    Russia
     
    • Eastern-Siberian Region
      • Prebaikalia (Pribaikal'e)
        • Irkutskaya Oblast'
          • Bodaibo
            • Lena Gold District
              • Kropotkinsky ore cluster
    http://www.igem.ru/igem/chem/pt/sukhloge.htm
    • Far-Eastern Region
      • Kamchatka Oblast'
    No reference listed
      • Magadanskaya Oblast'
        • Kolyma River Basin
          • Ducat District
            • Omsukchan
              • Ducat ore field
    http://www.igem.ru/lmin/fil/metal.htm
      • Primorskiy Kray
        • Khanka Lake
    V.V. Seredin data
    • Northern Region
      • Karelia Republic
        • Northern Karelia
    P.M. Kartashov analytical data (1987)
      • Komi Republic
        • Timan Range
    [AmMin 85:1845]
    • Urals Region
      • Southern Urals
        • Orenburgskaya Oblast'
    M.I. Novgorodova analytical data
    The Moon
     
    • Apollonius Highlands
    Mokhov A.V. and Kartashov P.M. data
    Mineral and/or Locality  
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    Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. 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 thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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