Sulfide Mineral

(redirected from sulphide mineral)

sulfide mineral

[′səl‚fīd ‚min·rəl]
(mineralogy)
A mineral compound characterized by the linkage of sulfur with a metal or semimetal.

Sulfide Mineral

 

any of various minerals comprising a class and consisting of sulfur compounds of metals. Sulfide minerals comprise (by weight) about 0.15 percent of the earth’s crust; more than 200 sulfide mineral varieties are known. The natural selenides, tellurides, and arsenides, as well as the antimonides and bismuth minerals, are close to the sulfide minerals.

The main species-forming elements of sulfide minerals are Pb, Cu, Sb, As, Ag, Bi, Fe, Co, and Ni, which are the components of dozens of mineral species. Only three to five compounds each are formed by Zn, Cd, Mn, Ge, Sn, Tl, Mo, and Hg, but among them are such common and industrially important minerals as sphalerite (ZnS), molybdenite (MoS2), and cinnabar (HgS). Among the elements encountered as isomorphic admixtures in sulfide minerals are Au, Ag, Ga, Ge, In, Tl, and Re. In addition to simple sulfide minerals, which are derivatives of hydrogen sulfide, H2S (for example, Ag2S and PbS), there are also persulfides, which are derivatives of H2S2 (for example, FeS2), complex sulfides (for example, Pb5Sb4S11), sulfosalts with [AsS]3– and [SbS3]3– anions (for example, Ag3SbS3), and double sulfides (for example, chalcopyrite, CuFeS2).

In the modern classification of sulfide minerals, which is based on data from crystal chemistry, subclasses are distinguished within the major chemical types and groups corresponding to crystal structures within these subclasses. The most important sulfide minerals include the following:

(1) Subclass of coordination minerals: galena (PbS) group, sphalerite (ZnS) group, pyrrhotite (Fe1–xS) group, pent-landite [(Fe,Ni)9S8] group, cubanite (CuFe2S3) group, chalcopyrite (CuFeS2) group, and bornite (Cu5FeS4) group.

(2) Subclass of framework minerals: argentite (Ag2S) group and the gray ores.

(3) Subclass of ring minerals: realgar (AsS) group.

(4) Subclass of insular minerals: pyrite (FeS2) group, cobaltite-arsenopyrite (Co AsS – Fe AsS) group.

(5) Subclass of chained minerals: antimonite (Sb2S3) group, millerite (NiS) group, and cinnabar (HgS) group.

(6) Subclass of layered minerals: molybdenite (MoS2) group, orpiment (As2S3) group, and covellite (CuS) group.

The natural sulfide minerals have mainly covalent bonding. Most of them are semiconductors (those with pyrite, marcasite, and arsenopyrite structures), but compounds with metallic conductivity, as well as insulators and superconductors, also exist. (Several disulfides are among the superconductors.) A number of sulfide minerals—for example, antimonite—are ferroelectric. On the basis of magnetic properties, a distinction is made between diamagnetic, paramagnetic, ferromagnetic, and antiferromagnetic sulfide minerals.

Most sulfide minerals are optically opaque, and they often have high reflectivity. Their hardness on Mohs’ scale usually ranges from 2 to 4; the hardness of layered minerals, such as molybdenite and covellite, is only 1–2, whereas persulfides, such as pyrite, have a hardness of up to 5–7. The density of sulfide minerals is greater than 4,000 kg/m3.

The vast majority of sulfide minerals are components of hydrothermal sulfide ores. Some sulfides of Fe, Ni, Cu, and Pt are associated with processes of magma formation in ultrabasic rocks. Sulfide minerals may be of sedimentary origin, or they may be exogenous, having been deposited from surface solutions under the action of H2S—for example, in coal-bearing strata and in oxidation zones of sulfide deposits. Upon oxidation on the earth’s surface, sulfide minerals change readily into sulfates and then into hydroxides, carbonates, and the salts of other oxy acids, and, less often, into such native elements as copper and silver. Many sulfide minerals are important ore minerals.

REFERENCES

Ramdohr, P. Rudnye mineraly i ikh srastaniia. Moscow, 1962. (Translated from German.)
Mineraly: Spravochnik, vol. 1. Moscow, 1960.
Marfunin, A. S. Vvedenie v fiziku mineralov. Moscow, 1974.

A. S. MARFUNIN

References in periodicals archive ?
Release date- 02092019 - Amur Minerals Corporation ('Amur' or the 'Company'), the nickel-copper sulphide mineral exploration and resource development company focused on the far east of Russia, announces that, pursuant to the convertible loan agreement entered into on 22 March 2019, the Company has today issued 12,816,067 new ordinary shares of no par value of the Company ('Ordinary Shares') to Cuart Investments PCC Ltd and YA II PN Ltd in settlement of US$281,466 of principal and accrued interest.
ferrooxidans biomining bacteria and copper sulphide mineral surface during a bioleaching process.
Saw sampling over the area outlined quartz monzonite rocks with pyrite and oxidized pyrite being the dominant sulphide mineral along with minor Chalcopyrite, Chalcosine, Molybdenite and Malachite (Oxide).
The mineralization is very simple with gold associated with pyrite, which is the only significant sulphide mineral in the deposit.
The company believes it has exploration potential for additional oxide and sulphide mineral resources.
[C.sub.S] O2 = oxygen concentration at the sulphide mineral surface (mol/[m.sup.3])
Manchester were first on the buzzer again, identify marcasite as the "iron sulphide mineral used in the manufacture of costume jewellery".
Release date- 27082019 - Amur Minerals Corporation ('Amur' or the 'Company'), the nickel-copper sulphide mineral exploration and resource development company focused on the far east of Russia, is pleased to announce that Mr.
Eight diamond drill rigs remain deployed at the project site to carry out infill drilling to increase sample density in the deep sulphide mineral resource.
Sulphide mineral reserves that will be processed through the flotation concentrator have been classified into five ore types from three zones.
30 November 2015 - Russia-focused nickel-copper sulphide mineral exploration and resource company Amur Minerals Corp.
The company has completed 323 exploration drill holes at the Hycroft oxide and sulphide mineral systems.