α-Brass (original) (raw)

Valid as an unnamed mineral

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Photos of α-Brass (6)

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α-Brass, etc.

Hachijo Island, Hachijo, Hachijō Subprefecture, Tokyo Metropolis, Japan

α-Brass

Miyake Island, Miyake Subprefecture, Tokyo Metropolis, Japan

α-Brass

Hachijo Island, Hachijo, Hachijō Subprefecture, Tokyo Metropolis, Japan

α-Brass, etc.

Hachijo Island, Hachijo, Hachijō Subprefecture, Tokyo Metropolis, Japan

α-Brass

Miyake Island, Miyake Subprefecture, Tokyo Metropolis, Japan

α-Brass

Hachijo Island, Hachijo, Hachijō Subprefecture, Tokyo Metropolis, Japan

α-Brass, etc.

Hachijo Island, Hachijo, Hachijō Subprefecture, Tokyo Metropolis, Japan

α-Brass

Miyake Island, Miyake Subprefecture, Tokyo Metropolis, Japan

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About α-BrassHide

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Formula:

Cu3Zn

Colour:

yellow

Lustre:

Metallic

Crystal System:

Isometric

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.
α-Brass is slightly harder than copper, but not as hard as bronze.

Compare zhanghengite and danbaite.

Unique IdentifiersHide

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Mindat ID:

6830

Long-form identifier:

mindat:1:1:6830:3

GUID
(UUID V4):

ca292aaa-9bdf-4a89-829a-db67171eef42

IMA Classification of α-BrassHide

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IMA status notes:

Unnamed (probably valid)

Approval history:

Unnamed, but probably valid.

Classification of α-BrassHide

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Strunz-mindat (2025):

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

Pronunciation of α-BrassHide

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Pronunciation:

Physical Properties of α-BrassHide

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Lustre:

Metallic

Transparency:

Opaque

Colour:

Yellow

Streak:

Golden-yellow

Tenacity:

Malleable

Cleavage:

None Observed

Fracture:

Irregular/Uneven

Optical Data of α-BrassHide

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Type:

Isotropic

Chemistry of α-BrassHide

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Mindat Formula:

Cu3Zn

Elements listed:

Cu, Zn - search for minerals with similar chemistry

Crystallography of α-BrassHide

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Crystal System:

Isometric

Class (H-M):

m_3_m _(_4/_m_32/m ) - Hexoctahedral

Synonyms of α-BrassHide

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Brass

Other Language Names for α-BrassHide

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French:Laiton

German:Messing

Japanese:自然黄銅

Russian:α-Латунь

Simplified Chinese:黄铜

Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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Other InformationHide

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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.

Internet Links for α-BrassHide

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mindat.org URL:

https://www.mindat.org/min-6830.html
Please feel free to link to this page.

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References for α-BrassHide

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Reference List:

(n.d.)

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

Localities for α-BrassHide

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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.

Locality ListHide

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- 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.