Mineral Factbook

Aerugite

Ni8.5(AsO4)2As5+O8IMA symbol: Aruredefined

Aerugite is a phosphate, arsenate, or vanadate mineral with the formula Ni8.5(AsO4)2As5+O8, crystallizing in the trigonal system. It has a Mohs hardness of 4, a calculated density of 5.772 g/cm3. Its streak is light blue green.

Photos

Aerugite specimen photo
Anthony R. Kampf, Barbara P. Nash, Jakub Plášil, Jason B. Smith, and Mark N. Feinglos · CC BY 4.0 · Commons
Aerugite specimen photo
Anthony R. Kampf, Barbara P. Nash, Jakub Plášil, Jason B. Smith, and Mark N. Feinglosa · CC BY 4.0 · Commons
Aerugite specimen photo
David Hospital · CC BY-SA 4.0 · Commons
Aerugite specimen photo
Robert M. Lavinsky · CC BY-SA 3.0 · Commons

Crystallography

Crystal systemtrigonal crystal systemWikidata (CC0)
Space groupR -3 m :R
Cell (Å, °)a = 9.8105, b = 9.8105, c = 9.8105; α = 35.312, β = 35.312, γ = 35.312
Cell volume281.837 ų, Z = 1
Axial ratios1.0000:1:1.0000calculated from COD 9007677
Source structureCOD 9007677 (Acta Crystallographica, Section B, 1989)

Powder X-ray diffraction (calculated)

2θ (degrees, Cu Kα1)I/I₀ (max 100)
d (Å)2.0641.4882.3342.4141.4322.498
I/I₀10062.9555049.741

xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9007677; idealized occupancies, no preferred orientation.

Physical properties

Density (calculated)5.772 g/cm³calculated from COD 9007677
Hardness (Mohs)
4single sourceWikidata (CC0)
Streak
light blue greensingle sourceWikidata (CC0)
bright greensingle sourceWikidata (CC0)

Classification

Nickel-Strunz (10th)8.BC.15Wikidata (CC0)
Nickel-Strunz (9th)8.BC.15Wikidata (CC0)