pentlandite


Also found in: Dictionary, Thesaurus, Wikipedia.
Related to pentlandite: garnierite, pyrrhotite

pentlandite

(pĕnt`ləndīt), yellowish-bronze, opaque mineral, a sulfide of iron and nickel, (Fe,Ni)9S8. It is found in masses nearly always associated with the iron sulfide pyrrhotite. The largest deposit of this important ore of nickel is at Sudbury, Ont. Important deposits are mined in Manitoba, Russia, and W Australia.

Pentlandite

 

(named after the British traveler J. Pentland [1797–1873], who first discovered the mineral), a nickel-iron pyrite; a mineral with the chemical composition (Fe, Ni)9S8. It contains, by weight, 32.55 percent Fe, 34.22 percent Ni, and 32.23 percent S. It also generally contains a 3-percent admixture of Co. A variety of pentlandite containing up to 49 percent Co is known as cobalt pentlandite.

Pentlandite crystallizes in the isometric system and exhibits octahedral parting. The crystal lattice is composed of eight tetrahedrons with common edges; four tetrahedrons contain Fe2+ ions, and the remaining four contain Ni2+ ions. Similar groups are, in turn, bonded at common apices and arranged at the corners of the face-centered cubic lattice. The ions Fe2+ and Ni2+, occurring in octahedral coordination relative to the S ions, are located between the tetrahedral groups.

Pentlandite has a metallic luster, a light bronze-yellow color, a hardness on Mohs’ scale of 3–4, and a density of 4,500–5,185 kg/m3. It occurs in the form of massive or granular aggregates in sulfide-ore deposits genetically associated with basic and ultrabasic igneous rocks, such as gabbro-norites and pyroxenites. Pentlandite is one of the principal minerals of nickel ores.

pentlandite

[′pent·lən‚dīt]
(mineralogy)
(Fe,Ni)9S8 A yellowish-bronze mineral having a metallic luster and crystallizing in the isometric system; hardness is 3.5-4 on Mohs scale, and specific gravity is 4.6-5.0; the major ore of nickel.
References in periodicals archive ?
Selective leaching of nickel from the copper flotation concentrate was possible due to the development of galvanic couple between copper containing chalcopyrititic phase and nickel containing pentlandite.
The mineralogical composition of the 461 Orebody is massive and semi- massive nickel sulphides comprised of pyrrhotite, pentlandite and chalcopyrite.
M2 Zone mineralization is associated within fine to coarse grained and net textured semi-massive and massive sulphides consisting of chalcopyrite, pyrrhotite, pentlandite and pyrite.
12 /PRNewswire-FirstCall/ - Ongoing drilling down dip and down plunge of the eastern most part of the Norton massive sulphide zone has intersected a 15 m (50 foot) width of mineralization which consists of an upper pyrrhotite- pentlandite brecciated "Durchbewegung" sulphide zone and a lower chalcopyrite- pyrrhotite-pyrite zone separated by a 1 m gabbro- pyroxenite layer.
The mineralization consisted mostly of chalcopyrite, pyrrhotite, pentlandite and pyrite.
m section of massive pyrrhotite with pentlandite crystals that yielded nickel values as high as 1.
Its mineralization and characteristics are very similar to typical Sudbury Basin footwall deposits which vary in thickness from several feet to tens of feet and are characterized by high grades and sharp-walled, massive sulfide veins consisting of chalcopyrite, cubanite, pentlandite and millerite.
The Ni and Cu is reported to occur predominantly in sulphides, principally pentlandite and chalcopyrite, respectively.
Drill hole MA05-01 intersected discontinuous stringers to locally semi-massive sulphides consisting of pyrhhotite, pyrite, pentlandite and rare chalcopyrite.
Detailed thin-section petrographic studies indicate the presence of trace to minor amounts of sulfides (up to 1%), mainly pyrrhotite and pentlandite, intergrown with magnetite and chromite within and at the margins of serpentinized olivine grains.
Two massive sulfide veins consisting of chalcopyrite, cubanite, pentlandite and millerite were intersected approximately 3,900 ft vertically below surface.
Three of the five newly reported drill holes (WSO-04-12, 16 & 17) intersected local narrow massive sulphide mineralization with visible chalcopyrite, pyrrhotite, and pentlandite.