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Eta-bronze

Formula:
Cu
 
6
Sn
 
5
System:HexagonalColour:White to bronze
Lustre:MetallicHardness:2


Reported natural occurrence of the alloy in oxidised tin ores.

Originally reported from Panasqueira Mines, Panasqueira, Covilhã, Castelo Branco District, Portugal.

Classification of Eta-bronze

IMA status:Published without Approval
Nickel-Strunz 10th (pending) edition ID:1.AC.15

1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
C : Indium-tin family
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Physical Properties of Eta-bronze

Lustre:Metallic
Colour:White to bronze
Hardness (Mohs):2

Crystallography of Eta-bronze

Crystal System:Hexagonal

Chemical Properties of Eta-bronze

Formula:
Cu
 
6
Sn
 
5
Idealised Formula:
Cu
 
1.2
Sn
Essential elements:Cu, Sn
All elements listed in formula:Cu, Sn

Relationship of Eta-bronze to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
1.AC.05Indium
In
1.AC.10Tin
Sn
1.AC.15Sorosite
Cu
 
1+x
(Sn,Sb), where 0.1 ≤ x ≤ 0.2
1.AC.15Yuanjiangite
AuSn
1.AC.15UM1965-07-E:CuSn
Cu
 
3
Sn

Other Names for Eta-bronze

Synonyms:
Bronze-n'Cu6Sn5η-BronzeNative Bronzen'-Bronze
Other Languages:

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.

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    Localities for Eta-bronze

    Hide Locality List
    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.
    Portugal
     
    • Castelo Branco District
      • Covilhã
        • Panasqueira
    		No reference listed
    Russia
     
    • Far-Eastern Region
      • Chukotskii Autonomous Okrug
        • Okhotsk-Chukotka belt
    		[AmMin 82:821]
    • Northern Region
      • Karelia Republic
        • Northern Karelia
    		P.M. Kartashov data
    U.S. Virgin Islands
     
    Alminas, Henry V.; Foord, Eugene E.; Tucker, Robert E. (1994) Geochemistry, mineralogy, and geochronology of the U.S. Virgin Islands USGS Bulletin 2057 36p
    • St Thomas
    		Alminas, Henry V.; Foord, Eugene E.; Tucker, Robert E. (1994) Geochemistry, mineralogy, and geochronology of the U.S. Virgin Islands USGS Bulletin 2057 36p
    Uzbekistan
     
    • Sidaryo (Syrdar'ya) Viloyati
      • North Nuratau Range
    		Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    Mineral and/or Locality
    Google
     
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