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.
The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

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.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
ferrooxidans strains in only partially oxidize the pentlandite and also by the unadaptation of bacterial cells to higher concentrations of nickel [1, 13].
The results of X-ray diffraction (XRD) analysis reveal the presence of chalcopyrite (CuFe[S.sub.2]), pentlandite [[(Fe Ni).sub.9] [S.sub.8]] as major phases and pyrite (Fe[S.sub.2]), pyrrhotite (FeS), violarite [[(Ni Fe).sub.3] [S.sub.4]] as minor phases in the copper flotation concentrate prior to leaching(Table.3).
This suggested that pentlandite was oxidized in parallel with pyrrhotite.
Massive sulphide mineralisation identified at Radio Hill sits very close to the basal part of the intrusion and comprises pyrrhotite, chalcopyrite and pentlandite.
The ore mineralogy mostly consists of pyrrhotite, pentlandite, chalcopyrite and pyrite.
The peridotites in the region contain about 1% finely disseminated sulphide minerals, mainly pyrrhotite and pentlandite. The orebodies, meanwhile, contain net-textured to massive sulphides composed of hexagonal pyrrhotite, pentlandite, chalcopyrite, minor pyrite and trace sphalerite.
Pentlandite was found in Fall 2001 as metallic, bronzy brown, granular veins up to 8 cm in maximum dimension with minor magnetite and coarse platy talc in serpentine from the east face, fourth level.