Mineral Factbook

Zincite

ZnOIMA symbol: Zncgrandfathered

Zincite is an oxide or hydroxide mineral with the formula ZnO, crystallizing in the hexagonal system. It has a Mohs hardness of 4-4.5, typically orange, red or yellow in color, with an adamantine luster, a specific gravity of 5.43-5.7. Its streak is orange or yellow.

Photos

Zincite specimen photo
Mai Seppel · CC BY-SA 4.0 · Commons
Zincite specimen photo
Mai Seppel · CC BY-SA 4.0 · Commons
Zincite specimen photo
Ra'ike (see also: de:Benutzer:Ra'ike) · CC BY-SA 3.0 · Commons
Zincite specimen photo
Nessa Eull · CC0 · Commons

Crystallography

Crystal systemhexagonal crystal systemWikidata (CC0)
Space groupP 63 m c
Cell (Å, °)a = 3.249308, b = 3.249308, c = 5.205709; α = 90, β = 90, γ = 120
Cell volume47.5984 ų, Z = 2
Axial ratios1.0000:1:1.6021calculated from COD 2300450
Source structureCOD 2300450 (Journal of Applied Crystallography, 2014) — 1 of 9 structures

Powder X-ray diffraction (calculated)

2θ (degrees, Cu Kα1)I/I₀ (max 100)
d (Å)2.4752.8142.6031.6251.4771.378
I/I₀1005138.534.63328.2

xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 2300450; idealized occupancies, no preferred orientation.

Physical properties

Density (calculated)5.68 g/cm³calculated from COD 2300450
Hardness (Mohs)
4single sourceWikidata (CC0)
4-4.5single sourceDana, System of Mineralogy, 6th ed. (1892)
Specific gravity
5.43-5.7 g/cm3corroboratedDana, System of Mineralogy, 6th ed. (1892)
Color
orange, red, yellowsingle sourceDana, System of Mineralogy, 6th ed. (1892)
Streak
orange, yellowsingle sourceDana, System of Mineralogy, 6th ed. (1892)
Luster
adamantinesingle sourceDana, System of Mineralogy, 6th ed. (1892)

Chemistry (calculated)

Molecular weight81.41 g/molcalculated from the IMA formula
Composition (wt%)Zn 80.35%, O 19.65%

Classification

Nickel-Strunz (10th)4.AB.20Wikidata (CC0)
Nickel-Strunz (9th)4.AB.20Wikidata (CC0)
Dana (8th)4.2.2.1Wikidata (CC0)