Millerite

(redirected from Nickel sulfide)
Also found in: Dictionary, Thesaurus, Wikipedia.

millerite

[′mil·ə‚rīt]
(mineralogy)
NiS A brass to bronze-yellow mineral that crystallizes in the hexagonal system and usually contains trace amounts of cobalt, copper, and iron; hardness is 3-3.5 on Mohs scale, and specific gravity is 5.5; it generally occurs in fine crystals, chiefly as nodules in clay ironstone. Also known as capillary pyrites; hair pyrites; nickel pyrites.

Millerite

 

(named after the British crystallographer W. Miller [1801–80]), a mineral of the sulfide class; nickel sulfide, NiS, containing 64.7 percent Ni and 35.3 percent S. Millerite crystallizes in the trigonal system, forming characteristic slender brass-yellow hairlike crystals. It also forms fibrous, radiating, and other kinds of aggregates. Millerite has a hardness of 3–4 on Mohs’ scale and a density of 5,200–5,600 kg/m3. It occurs rarely in nature, usually in hydrothermal ore veins in association with other Ni and Co sulfides and arsenides, which are contained in copper-nickel ores (in Noril’sk and Monchegorsk in the USSR). Millerite is also formed during the sur-face weathering of nickel-bearing ultrabasic rocks by acidic surface waters saturated with H2S.

REFERENCE

Mineraly: Spravochnik, vol. 1. Moscow, 1960.
References in periodicals archive ?
As part of this agreement, Inco will be subscribing to a private placement of LionOre shares, the proceeds of which will be used to repay a A$25 million loan that Inco had extended to LionOre in connection with the development of the Emily Ann nickel sulfide project.
The smelter produces blister copper (98% Cu) for shipment to the copper refinery and a slow-cooled Bessemer matte (75% Cu + Ni) which is separated at the matte separation plant into nickel sulfides (mainly heazlewoodite), metallics and copper sulfide (chalcocite).
The topics include preparing cobalt ferrite-silicon core shell nanoparticles doped with ferromagnetic manganese for possible biological application, thermal expansion in copper and nickel sulfides and their alloys, describing the drying of whole bananas with a diffusion model that uses a numerical solution through generalized coordinates, analyzing the substructure of high-manganese steels in the context of a dominant stress mechanism, the impact of selected structure parameters of reinforcing preforms for metal-matrix composites on their saturation process, investigating salt diffusion in soil by using radiotracing techniques, assessing the influence of the Hess-Murray Law on suspension flow through ramified structures, and sewage sludge flow and drying characteristics in paddle dryers.
He was one of the first scientists to suggest that iron sulfides and nickel sulfides might have held an important role in early life.