| Freieslebenite | |
|---|---|
.jpg) Freieslebenite from Hiendelaencina, Spain. Exposed in the Mineralogical Museum, Bonn, Germany | |
| General | |
| Category | Sulfosalt minerals |
| Formula (repeating unit) | AgPbSbS3 |
| IMA symbol | Flb[1] |
| Strunz classification | 2.JB.15 |
| Crystal system | Monoclinic |
| Crystal class | Prismatic (2/m) (same H-M symbol) |
| Space group | P21/n |
| Unit cell | a = 7.518(1) b = 12.809(4) c = 5.940(1) [Å] β = 92.25(1)°; Z = 4 |
| Identification | |
| Color | Pale steel-gray to silver-white or lead-gray |
| Crystal habit | Striated, prismatic crystals, inclusions and exsolutions in galena and other silver minerals |
| Twinning | Twin plane {010} |
| Cleavage | {110} Indistinct |
| Fracture | Brittle-conchoidal |
| Mohs scale hardness | 2.5 |
| Luster | Metallic |
| Streak | Whitish-gray |
| Diaphaneity | Opaque |
| Specific gravity | 6.20–6.23 |
| Pleochroism | Very weak |
| References | [2][3][4] |
Freieslebenite is a sulfosalt mineral composed of antimony, lead, and silver. Sulfosalt minerals are complex sulfide minerals with the formula: AmBnSp. The formula of freieslebenite is AgPbSbS3.
Freieslebenite was discovered in approximately 1773 in the Himmelsfurst mines of Freiberg, Saxony, Germany. The mineral was initially called Schilf-Glaserz; however, in 1845 it was given the current name Freieslebenite after the Mining Commissioner of Saxony, Johann Carl Freiesleben (1774–1846).[5]
- ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
- ^ Mindat
- ^ Handbook of Mineralogy
- ^ Webmineral data
- ^ (Palache et al., 1944)