Category
page 1Sulfur
sulfur
Sulfur (American spelling and the preferred IUPAC name) or sulphur (Commonwealth spelling) is a chemical element; it has symbol S and atomic number 16. It is abundant, multivalent and nonmetallic. Under normal conditions, sulfur atoms form cyclic octatomic molecules with the chemical formula S8. Elemental sulfur is a bright yellow, crystalline solid at room temperature.
sulfur cycle
biogeochemical cycle of sulfur
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niello
thumb|right|300px|Diptych with Nativity and Adoration, silver and niello, [[gilt-bronze frame, Paris, , The Cloisters]]
thumb|Byzantine gold ring with niello inscription: "Lord help Leontius, Patrician and Count of imperial Obsikion guarded by God",
Niello is a black mixture, usually of sulphur, copper, silver, and lead, used as an inlay on engraved or etched metal, especially silver. It is added as a powder or paste, then fired until it melts or at least softens, and flows or is pushed into engraved lines in the metal. It hardens and blackens when cool, and the niello on the flat surface is

disulfide
In chemistry, a disulfide (or disulphide in British English) is a compound containing a functional group or the anion. In inorganic chemistry, the anion appears in a few rare minerals. Compounds of the form are usually called persulfides instead.
isotope of sulfur
nuclides with atomic number of 16 but with different mass numbers
contact process
contact process is a method to prepare sulphuric acid / oil of vitriol in industrial cases.
lead chamber process
industrial process historically used to produce sulfuric acid

Sulfur lamp
lighting system
Flash smelting
smelting process for sulfur-containing ores
rosickýite
Rosickyite is a rare native element mineral that is a polymorph of sulfur. It crystallizes in the monoclinic crystal system and is a high temperature, high density polymorph. It occurs as soft, colorless to pale yellow crystals and efflorescences.

sulfur water
water that contains a lot of hydrogen sulfide
Blue lava
optical phenomenon resulting from burning sulfur
dixanthogen
chemical compound
sulfur dye
the most commonly used dyes manufactured for cotton in terms of volume
Sulfur mines in Sicily
sulfur mining in Sicily, Italy
fire and brimstone
idiomatic expression of signs of God's wrath in the Hebrew Bible (Old Testament) and the New Testament.
sulfur concrete
composite construction material with elemental sulfur as a binder
Sulphur Crisis of 1840
conflict between Sicily and the United Kingdom