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]
Freieslebenite is a sulfosalt mineral composed of antimony, lead, and silver. Sulfosalt minerals are complex sulfide minerals with the formula: AmBnSp...
Johann Karl Freiesleben (1774–1846), German mineralogist. The mineral Freieslebenite is named after him. Hauch-Fausbøll, T (1933) Haandbog over den ikke...
stratigraphy and geognosy as taught by Abraham Gottlob Werner. The mineral Freieslebenite is named in his honour. Freiesleben was born in Freiberg, Saxony, in...
with the chemical formula PbAgAsS3. It is the arsenic equivalent of freieslebenite (PbAgSbS3), but also displays close polyhedral characteristics with...
Winnipeg Thompson ISI top ten most highly cited geoscientists (1996–2007) Freieslebenite: AgPbSbS3 – Mining Commissioner of Saxony Johann Karl Freiesleben (1774–1846)...