Stannoidite

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Stannoidite
General
Category Sulfide mineral
Formula
(repeating unit)
Cu6+Cu22+(Fe2+,Zn)3Sn2S12
Strunz classification 02.CB.15c
Crystal symmetry Orthorhombic, Pearson symbol oI50, space group I222 No. 23
Unit cell a = 10.76 Å, b = 5.4 Å, c = 16.09 Å, Z = 2
Identification
Color Brass brown
Crystal habit Uniformly indistinguishable crystals forming large masses
Cleavage None
Fracture Conchoidal – uneven
Mohs scale hardness 4
Luster Metallic
Streak Brown gray
Diaphaneity Opaque
Specific gravity 4.29
References [1][2][3]

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.[1][2]

Stannoidite was first described in 1969 for an occurrence in the Konjo mine, Okayama prefecture, Honshu Island, Japan.[2]

See also[edit]

References[edit]

  1. ^ a b Stannoidite. Webmineral
  2. ^ a b c Stannoidite. Mindat.org
  3. ^ Kudoh Y., Takeuchi Y. Z. Kristallogr. 144 (1976) 145–160