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α-Brass

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Formula:
Cu3Zn
System:
Isometric
Colour:
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

Published without Approval
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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http://www.mindat.org/min-6830.html
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Physical Properties of α-Brass

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:
Cu3Zn
Essential elements:
All elements listed in formula:

Relationship of α-Brass to other Species

1.AB.MagnesiumMg
1.AB.05CadmiumCd
1.AB.05RheniumRe
1.AB.05ZincZn
1.AB.05TitaniumTi
1.AB.10bDanbaiteCuZn2
1.AB.10aZhanghengiteCuZn
1.AB.10bTongxiniteCu2Zn
1.AB.10aZinccopperiteCu7Zn4 (?)
1.AB.10UM2003-03-E:AgAuCuZn(Cu,Au,Ag)4Zn
1.AB.10UM1980-01-E:CuZnCu3Zn
1.AB.10UM1980-02-E:CuZnCu4.45Zn

Other Names for α-Brass

Name in Other Languages:
French:Laiton
German:Messing
Simplified Chinese:黄铜

Other Information

Magnetism:
Paramagnetic
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 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

Localities for α-Brass

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 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.
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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