Examples of sulfides
What are sulfides on the periodic table?
Sulfides are compounds derived from the sulfide anion, S2–. As sulfur is a member of group 16 on the periodic table, it is considered a chalcogen, and sulfide compounds belong to a class of compounds known as chalcogenides.
What is the most common sulfide mineral?
Pyrite
Pyrite (FeS2) is by far the most abundant sulphide mineral. The very fine particle iron sulphides found in reducing environments beneath the surfaces of Recent sediments and soils, although transient species, are also volumetrically important.
What are metal sulfides?
Metal sulfides are a major group of minerals that provide the crystal chemist a rich field for investigation due to their diverse structural types. They are abundant and cheap since they usually exist in nature as minerals such as heazlewoodite (Ni3S2), chalcocite (Cu2S), pyrite (FeS2) and so on.
What rocks are sulfides?
Several hundred sulfide minerals are known, but only five are sufficiently abundant accessory minerals to have been categorized as ‘rock forming’ (Bowles et al. 2011). These five are pyrite, pyrrhotite, galena, sphalerite and chalcopyrite, and it is the iron sulfides (pyrite and pyrrhotite) which are dominant.
Is gold a sulfide?
Gold(I) sulfide is the inorganic compound with the formula Au 2S. It is the principal sulfide of gold. It decomposes to gold metal and elemental sulfur, illustrating the “nobility” of gold.
…
Gold(I) sulfide.
…
Gold(I) sulfide.
| Names | |
|---|---|
| Chemical formula | Au 2S |
| Molar mass | 425.998 g/mol |
| Density | 11 g/cm3 |
| Melting point | 240 °C (464 °F; 513 K) |
Where are metal sulfides found?
Sulfide minerals, most commonly iron sulfide (FeS2) or pyrite, are commonly associated with coal seams and metal ores, and exposure of these minerals to oxygen and water produces reactions of the following type:2FeS2+7O2+2H2O→2FeSO4+2H2SO4 pyrite+oxygen+water→iron sulfate+sulfuric acidHence, the pyrite oxidizes to form …
How do you identify sulfides?
Sulfide minerals consist of one or more metals combined with sulfur; sulfarsenides contain arsenic replacing some of the sulfur. Sulfides are generally opaque and exhibit distinguishing colours and streaks. (Streak is the colour of a mineral’s powder.)
What is the meaning of sulfides?
Definition of sulfide
1 : any of various organic compounds characterized by a sulfur atom attached to two carbon atoms. 2 : a binary compound (such as CuS) of sulfur usually with a more electropositive element or group : a salt of hydrogen sulfide.
What are sulfides used for?
General Suggested Uses for Sulfides
Rare earth sulfides are semi-conductors and have been used in thermoelectric devices. Alkaline earth sulfides plus those of calcium and zinc are used for phosphor compositions. Molybdenum and tungsten sulfides are widely used, non-graphitic commercial lubricants.
What is the most frequent sulfide?
The most common sulfide mineral found under crustal conditions is pyrite (FeS2) which is formed at temperatures below 743°C during diagenesis, metamorphism, late-stage magmatic crystallization and hydrothermal activity, or through exsolution and recrystallization of higher-temperature sulfide phases during cooling.
Which are the two common sulfide minerals?
Some examples of sulfides include galena ( the principle ore mineral for lead and silver), cinnabar (the main ore mineral for mercury), and chalcopyrite (which provides copper).
Is pyrite a sulfide mineral?
Pyrite, or iron disulfide, is the most common sulfide mineral on the Earth’s surface and is widespread through the geological record.
Is quartz a sulfide mineral?
No, quartz is NOT a sulfide mineral; it is a silicate mineral. Quartz is made up of a covalent network of silicon dioxide molecules.
How do you identify sulfides?
Sulfide minerals consist of one or more metals combined with sulfur; sulfarsenides contain arsenic replacing some of the sulfur. Sulfides are generally opaque and exhibit distinguishing colours and streaks. (Streak is the colour of a mineral’s powder.)
What is the meaning of sulfides?
Definition of sulfide
1 : any of various organic compounds characterized by a sulfur atom attached to two carbon atoms. 2 : a binary compound (such as CuS) of sulfur usually with a more electropositive element or group : a salt of hydrogen sulfide.
What are sulfides used for?
General Suggested Uses for Sulfides
Rare earth sulfides are semi-conductors and have been used in thermoelectric devices. Alkaline earth sulfides plus those of calcium and zinc are used for phosphor compositions. Molybdenum and tungsten sulfides are widely used, non-graphitic commercial lubricants.
Is copper a sulfide?
Copper sulfide belongs to a family of chemical compounds and minerals with the formula CuxSy. It can be classified into three groups, namely monosulfide, disulfide and mixed monosulfide. Copper sulfide occurs naturally in nature as a mineral called covellite.
What are the black sulfides?
Sulfide chimneys are pinnacle-shaped structures that form when super-heated seawater, richly charged with metals and volcanic gases, rises into the bitterly cold deep ocean from hot regions below the seafloor.