Mineral Factbook

Germanite

Cu13Fe2Ge2S16IMA symbol: Gergrandfathered

Germanite is a sulfide or sulfosalt mineral with the formula Cu13Fe2Ge2S16. It has a Mohs hardness of 3, a calculated density of 4.468 g/cm3.

Photos

Germanite specimen photo
Fentriss · CC0 · Commons
Germanite specimen photo
Kritzolina · CC BY-SA 4.0 · Commons
Germanite specimen photo
Kritzolina · CC BY-SA 4.0 · Commons
Germanite specimen photo
Kritzolina · CC BY-SA 4.0 · Commons

Crystallography

Space groupP -4 3 n
Cell (Å, °)a = 10.5862, b = 10.5862, c = 10.5862; α = 90, β = 90, γ = 90
Cell volume1186.37 ų, Z = 2
Axial ratios1.0000:1:1.0000calculated from COD 9000940
Source structureCOD 9000940 (American Mineralogist, 1984)

Powder X-ray diffraction (calculated)

2θ (degrees, Cu Kα1)I/I₀ (max 100)
d (Å)3.0561.8711.5962.6471.2141.323
I/I₀10070.237.215.413.79.9

xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9000940; idealized occupancies, no preferred orientation.

Physical properties

Density (calculated)4.468 g/cm³calculated from COD 9000940
Hardness (Mohs)
3single sourceWikidata (CC0)

Chemistry (calculated)

Molecular weight1596.11 g/molcalculated from the IMA formula
Composition (wt%)Cu 51.76%, Fe 7%, Ge 9.1%, S 32.14%

Classification

Nickel-Strunz (10th)2.CB.30Wikidata (CC0)
Nickel-Strunz (9th)2.CB.30Wikidata (CC0)