Stannoidite

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
General
Category	Sulfide mineral
Formula (repeating unit)	Cu6+Cu22+(Fe2+,Zn)3Sn2S12
Strunz classification	2.CB.15c
Crystal system	Orthorhombic
Crystal class	Disphenoidal (222) H-M symbol: (2 2 2)
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 was first described in 1969 for an occurrence in the Konjo mine, Okayama prefecture, Honshu Island, Japan. 

This article uses material from the Wikipedia article  Metasyntactic variable, which is released under the  Creative Commons Attribution-ShareAlike 3.0 Unported License.