 | This article relies largely or entirely on a single source. (December 2023) |
| Fangite | |
|---|---|
| General | |
| Category | Sulfosalt |
| Formula (repeating unit) | Tl3AsS4 |
| IMA symbol | Fg |
| Strunz classification | 2.Ka.15 |
| Crystal system | Orthorhombic |
| Crystal class | 2/m 2/m 2/m - Dipyramidal |
| Space group | Pnma |
| Unit cell | a = 8.894(8) Å, b = 10.855(9) Å c = 9.079(9) Å; Z = 4 |
| Identification | |
| Formula mass | 816.3315 |
| Color | Deep red, maroon |
| Mohs scale hardness | 2-2.5 |
| Luster | Vitreous, metallic |
| Streak | Orange |
| Diaphaneity | Transparent |
| Density | 6.185 g/cm3 |
| Polish luster | Blue-gray |
| Birefringence | Very low |
| Dispersion | Relatively strong |
| References | [1] |
Fangite is a sulfosalt first discovered in the Mercur gold deposit located in Tooele County Utah. The specimen was found in a boulder in the southern Oquirrh Mountains. The only available specimens of fangite are located in the National Museum of Natural History, Smithsonian Institution. The International Mineralogical Association Commission approved the name Fangite after Dr. Jen-Ho Fang, a crystal chemist affiliated with the University of Alabama, in honor of his significant contributions to crystallography, crystal chemistry, and geostatistics.[1]