Eugenite
Rare silver mineral
From Wikipedia, the free encyclopedia
Eugenite is a rare silver-mercury mineral. It crystallizes in the orthorhombic crystal system.
| Eugenite | |
|---|---|
Eugenite with Luanheite | |
| General | |
| Category | silver mineral |
| Formula | Ag11(Hg2)2 |
| Strunz classification | 1.AD.15c |
| Crystal system | Orthorhombic |
| Crystal class | Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m) |
| Space group | Pbam (no. 55) |
| Unit cell | a = 6.092 Å, b = 14.407 Å c = 7.811 Å; Z = 4 V = 685.55 a:b:c = 0.423 : 1 : 0.542 |
| Identification | |
| References | [1][2] |
History
Its occurrence was first confirmed in the Sieroszowice copper mine, Lubin-Sieroszowice district, Poland.[1]
Etymology
The mineral is named in honor of Eugen Friedrich Stumpfl (27 November 1931, Munich, Germany - 12 July 2004, Innsbruck, Austria), professor of mineralogy, Mining Institute, Leoben (Austria), for his studies of noble metal compounds.[2]
Physical properties
It has a silver white color. And it is metallic and isometric.[3]
Occurrence
It is mostly found in cuprite and in low-grade copper sulfide ores in shale and carbonate rocks.[1]