Mineral Factbook

Aikinite

CuPbBiS3IMA symbol: Aikgrandfathered

Aikinite is a sulfide or sulfosalt mineral with the formula CuPbBiS3. It has a Mohs hardness of 2-2.5, typically black, gray or red in color, with a metallic luster, a specific gravity of 6.1-6.8.

Photos

Aikinite specimen photo
Pacific Museum of Earth from Canada · CC BY-SA 2.0 · Commons
Aikinite specimen photo
Pacific Museum of Earth from Canada · CC BY-SA 2.0 · Commons
Aikinite specimen photo
Pacific Museum of Earth from Canada · CC BY-SA 2.0 · Commons
Aikinite specimen photo
Pacific Museum of Earth from Canada · CC BY-SA 2.0 · Commons

Crystallography

Space groupP n m a
Cell (Å, °)a = 11.608, b = 4.0279, c = 11.275; α = 90, β = 90, γ = 90
Cell volume527.172 ų, Z = 4
Axial ratios2.8819:1:2.7992calculated from COD 9007524
Source structureCOD 9007524 (Acta Crystallographica, Section B, 1971) — 1 of 2 structures

Powder X-ray diffraction (calculated)

2θ (degrees, Cu Kα1)I/I₀ (max 100)
d (Å)2.8543.663.1753.5763.1542.674
I/I₀10095.281.477.367.462

xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9007524; idealized occupancies, no preferred orientation.

Physical properties

Density (calculated)7.256 g/cm³calculated from COD 9007524
Hardness (Mohs)
2-2.5single sourceDana, System of Mineralogy, 6th ed. (1892)
Specific gravity
6.1-6.8 g/cm3single sourceDana, System of Mineralogy, 6th ed. (1892)
Color
black, gray, redsingle sourceDana, System of Mineralogy, 6th ed. (1892)
Luster
metallicsingle sourceDana, System of Mineralogy, 6th ed. (1892)

Chemistry (calculated)

Molecular weight575.92 g/molcalculated from the IMA formula
Composition (wt%)Cu 11.03%, Pb 35.98%, Bi 36.29%, S 16.7%

Classification

Nickel-Strunz (10th)2.HB.05aWikidata (CC0)
Nickel-Strunz (9th)2.HB.05aWikidata (CC0)