| Stannoidite | |
| Category: | Sulfide mineral |
| Formula: | Cu6+Cu22+(Fe2+,Zn)3Sn2S12 |
| Imasymbol: | Sta[1] |
| Unit Cell: | a = 10.76 Å, b = 5.4 Å c = 16.09 Å, Z = 2 |
| Strunz: | 2.CB.15c |
| System: | Orthorhombic |
| Class: | Disphenoidal (222) H-M symbol: (2 2 2) |
| Symmetry: | I222 (No. 23) |
| Color: | Brass brown |
| Habit: | Uniformly indistinguishable crystals forming large masses |
| Cleavage: | None |
| Fracture: | Conchoidal – uneven |
| Mohs: | 4 |
| Luster: | Metallic |
| Streak: | Brown gray |
| Gravity: | 4.29 |
| Diaphaneity: | Opaque |
| References: | [2] [3] [4] |
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.[2] [3]
Stannoidite was first described in 1969 for an occurrence in the Konjo mine, Okayama prefecture, Honshu Island, Japan.[3]