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Stannoidite

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Stannoidite
Silvery stannoidite crystals from the Akenobe Mine, Yabu City, Honshu Island, Japan, associated with chalcopyrite
General
CategorySulfide mineral
Formula
(repeating unit)
Cu6Cu2(Fe,Zn)3Sn2S12
IMA symbolSta
Strunz classification2.CB.15c
Crystal systemOrthorhombic
Crystal classDisphenoidal (222)
H-M symbol: (2 2 2)
Space groupI222 (No. 23)
Unit cella = 10.76 Å, b = 5.4 Å
c = 16.09 Å, Z = 2
Identification
ColorBrass brown
Crystal habitUniformly indistinguishable crystals forming large masses
CleavageNone
FractureConchoidal – uneven
Mohs scale hardness4
LusterMetallic
StreakBrown gray
DiaphaneityOpaque
Specific gravity4.29
References

Stannoidite is a sulfide mineral composed of five chemical elements: copper, iron, zinc, tin and sulfur. Its name originates from Latin stannum (tin) and Greek eides (or Latin oïda meaning "like"). The mineral is found in hydrothermal Cu-Sn deposits.

Stannoidite was first described in 1969 for an occurrence in the Konjo mine, Okayama prefecture, Honshu Island, Japan.

See also

References

  1. Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
  2. ^ Stannoidite. Webmineral
  3. ^ Stannoidite. Mindat.org
  4. Kudoh Y., Takeuchi Y. (1976). "The superstructure of stannoidite". Zeitschrift für Kristallographie – Crystalline Materials. 144 (1–6): 145–160. Bibcode:1976ZK....144..145K. doi:10.1524/zkri.1976.144.16.145. S2CID 201808201.


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