Mineral Factbook

Caledonite

Cu2Pb5(SO4)3(CO3)(OH)6IMA symbol: Cdograndfathered

Caledonite is a sulfate mineral with the formula Cu2Pb5(SO4)3(CO3)(OH)6, crystallizing in the orthorhombic system. It has a Mohs hardness of 2.5-3, typically green in color, with a resinous luster, a specific gravity of 6.4. Its streak is white or green.

Photos

Caledonite specimen photo
Jan Czeczotka · CC BY-SA 4.0 · Commons
Caledonite specimen photo
Jan Czeczotka · CC BY-SA 4.0 · Commons
Caledonite specimen photo
Zzyzx · CC BY 3.0 · Commons
Caledonite specimen photo
Nessa Eull · CC0 · Commons

Crystallography

Crystal systemorthorhombic crystal systemWikidata (CC0)
Space groupP m n 21
Cell (Å, °)a = 20.085, b = 7.141, c = 6.563; α = 90, β = 90, γ = 90
Cell volume941.311 ų, Z = 2
Axial ratios2.8126:1:0.9191calculated from COD 9013793
Source structureCOD 9013793 (The Canadian Mineralogist, 2009) — 1 of 2 structures

Powder X-ray diffraction (calculated)

2θ (degrees, Cu Kα1)I/I₀ (max 100)
d (Å)3.1364.6873.0313.2812.7522.273
I/I₀10089.461.747.443.840.6

xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9013793; idealized occupancies, no preferred orientation.

Physical properties

Density (calculated)5.692 g/cm³calculated from COD 9013793
Hardness (Mohs)
2.5-3single sourceDana, System of Mineralogy, 6th ed. (1892)
Specific gravity
6.4 g/cm3single sourceDana, System of Mineralogy, 6th ed. (1892)
Color
greensingle sourceDana, System of Mineralogy, 6th ed. (1892)
Streak
green, whitesingle sourceDana, System of Mineralogy, 6th ed. (1892)
Luster
resinoussingle sourceDana, System of Mineralogy, 6th ed. (1892)

Chemistry (calculated)

Molecular weight1613.33 g/molcalculated from the IMA formula
Composition (wt%)Cu 7.88%, Pb 64.21%, S 5.96%, O 20.83%, C 0.74%, H 0.37%

Classification

Nickel-Strunz (10th)7.BC.50Wikidata (CC0)
Nickel-Strunz (9th)7.BC.50Wikidata (CC0)