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CaSO 4 · 1 / 2 H 2 O + 1 + 1 / 2 H 2 O → CaSO 4 · 2 H 2 O. This reaction is exothermic and is responsible for the ease with which gypsum can be cast into various shapes including sheets (for drywall), sticks (for blackboard chalk), and molds (to immobilize broken bones, or for metal casting). Mixed with polymers, it has been ...
Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO 4 ·2H 2 O. [4] It is widely mined and is used as a fertilizer and as the main constituent in many forms of plaster, drywall and blackboard or sidewalk chalk.
Calcium sulfite, or calcium sulphite, is a chemical compound, the calcium salt of sulfite with the formula CaSO 3 ·x(H 2 O). Two crystalline forms are known, the hemihydrate and the tetrahydrate, respectively CaSO 3 ·½(H 2 O) and CaSO 3 ·4(H 2 O). [2]
Anhydrite is 1–3% of the minerals in salt domes and is generally left as a cap at the top of the salt when the halite is removed by pore waters. The typical cap rock is a salt, topped by a layer of anhydrite, topped by patches of gypsum, topped by a layer of calcite. [ 8 ]
Chemical formula Synonyms CAS number C 10 H 16 N 2 O 8: Ethylenediaminetetraacetic acid (EDTA): 6381–92–6 C 12 H 22 O 11: sucrose: 57–50–1 C 18 H 29 O 3 S: sodium dodecyl benzenesulfonate: 2155–30–0
A simplified chemical composition with only Cl – in the interlayer, and without OH –, as: Ca 2 Al(OH) 6 (Cl) · 2 H 2 O. can be also written in cement chemist notation as: [1] 3CaO·Al 2 O 3 ·CaCl 2 · 10 H 2 O. Friedel's salt is formed in cements initially rich in tri-calcium aluminate (C 3 A).
Unit cell of Ca 2 SiO 4.Color code: red (O), blue (Ca), gold (Si). As verified by X-ray crystallography, calcium silicate is a dense solid consisting of tetrahedral orthosilicate (SiO 4 4-) units linked to Ca 2+ via Si-O-Ca bridges.
Calcium bisulfite can be prepared by treating lime (chemical formula Ca(OH) 2) with an excess of sulfur dioxide and water. [2] Upon synthesis of calcium bisulfite solution, it will have a green to yellow opaque appearance as an aqueous solution. [3]