Mineral Factbook

Pyrargyrite

Ag3SbS3IMA symbol: Pyggrandfathered

Pyrargyrite is a sulfide or sulfosalt mineral with the formula Ag3SbS3, crystallizing in the trigonal system. It has a Mohs hardness of 2.75, a calculated density of 5.855 g/cm3.

Photos

Pyrargyrite specimen photo
Parent Géry · CC BY-SA 3.0 · Commons
Pyrargyrite specimen photo
Parent Géry · CC BY-SA 3.0 · Commons
Pyrargyrite specimen photo
Parent Géry · CC BY-SA 3.0 · Commons
Pyrargyrite specimen photo
Didier Descouens · CC BY-SA 3.0 · Commons

Crystallography

Crystal systemtrigonal crystal systemWikidata (CC0)
Space groupR 3 c :H
Cell (Å, °)a = 11.0464, b = 11.0464, c = 8.7211; α = 90, β = 90, γ = 120
Cell volume921.602 ų, Z = 6
Axial ratios1.0000:1:0.7895calculated from COD 9015009
Source structureCOD 9015009 (Journal of Geosciences, 2010) — 1 of 4 structures

Powder X-ray diffraction (calculated)

2θ (degrees, Cu Kα1)I/I₀ (max 100)
d (Å)2.7832.5722.5383.343.1893.222
I/I₀10078.976.374.46250.1

xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9015009; idealized occupancies, no preferred orientation.

Physical properties

Density (calculated)5.855 g/cm³calculated from COD 9015009
Hardness (Mohs)
2.75single sourceWikidata (CC0)

Chemistry (calculated)

Molecular weight541.56 g/molcalculated from the IMA formula
Composition (wt%)Ag 59.75%, Sb 22.48%, S 17.76%

Classification

Nickel-Strunz (10th)2.GA.05Wikidata (CC0)
Nickel-Strunz (9th)2.GA.05Wikidata (CC0)
Dana (8th)3.4.1.2Wikidata (CC0)