Gypsum is calcium sulfate dihydrate (CaSO 4 2H 2 O). It is a natural mineral that occurs in certain types of sedimentary rocks. Gypsum forms when water evaporates in mineral-rich marine soil environments. Over long periods of time, evaporation brings more minerals to the soil surface, eventually forming a solid deposit. ...
The kinetics of calcium sulfate dihydrate (CaSO4·2H2O, gypsum) scale formation on heated metal surface from aqueous solution has been studied by a highly reproducible technique.
Calcium sulfate dihydrate ReagentPlus®, ≥99%; CAS Number: 10101-41-4; EC Number: 231-900-3; Synonyms: Gypsum dihydrate; Linear Formula: CaSO4 · 2H2O; find Sigma-Aldrich-C3771 MSDS, related peer-reviewed papers, technical documents, similar products & more at Sigma-Aldrich
dihydrate: Jour. Inorg. Nucl. Chem., v. 33, p. 2295-2311. ... Gypsum and anhydrite are both soluble minerals forming rocks that can dissolve at surface and underground resulting in sulphate karst ...
The main components of gypsum are calcium sulfate (CaSO 4) and water (H 2 O). Its chemical name is Calcium Sulphate Dihydrate and the chemical formula of gypsum is represented as CaSO 4.2H 2 O. Gypsum and Anhydrite (CaSO 4) are very similar chemically just that gypsum has 2 water molecules and Anhydrite does not …
Used to make Portland cement, plaster of Paris, artificial marble, and porous polymers; Also used in soil treatment, paints/enamels (pigment), pharmaceuticals, paper, insecticide dusts, water treatment, polishing powders, and plaster casts; [Merck Index] Used in Portland cement retarders, tiles, plaster, wallboard, polishing powders, paints, paper, dyeing and …
Calcium sulfate exists in three forms, namely dihydrate or gypsum (CaSO4·2H2O), anhydrite (CaSO4), and hemihydrate or bassanite (CaSO4·0.5H2O) …
Using FGD gypsum as the raw material, whitening and large prismatic dihydrate gypsum can be obtained by dissolution-crystallization and decoloring process with α-hemihydrate gypsum whiskers prepared in MgSO 4-CaCl 2-H 2 O solution, which can transform into whitening short columnar α-hemihydrate gypsum. The effects of …
Gypsum, scientifically known as Calcium Sulfate Dihydrate (CaSO 4 ·2H 2 O), is a naturally occurring mineral primarily formed from the evaporation of ancient bodies of sea water and lakes. It is a soft, transparent to translucent crystal that is typically white or colorless but can take on other hues when impurities are present.
Gypsum, a soft sulfate mineral known as calcium sulfate dihydrate, has been used for centuries as a reliable soil amendment to improve soil structure, enhance water infiltration, and reclaim saline and sodic soils.Its ability …
In the present research, the solubility of gypsum (calcium sulfate dihydrate) in aqueous electrolyte solutions was predicted using four different intelligent modeling techniques, including Adaptive Boosting-Support Vector Regression (AdaBoost-SVR), Extreme Learning Machine (ELM), Gradient Boosting-Support Vector Regression (GB …
The calcium sulphate dihydrate gypsum (CaSO 4 ·2H 2 O) is the most common sulphate evaporite mineral on our planet 1.Sulphate evaporites play an important role in Earth's sulphur cycle and are ...
Because the quarries of the Montmartre district of Paris have long furnished burnt gypsum (calcined gypsum) used for various purposes, this dehydrated gypsum became known as Plaster of Paris. Upon adding water, after a few tens of minutes, plaster of Paris becomes regular gypsum (dihydrate) again, causing the material to harden or "set" in ways that …
Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO4·2H2O. It is widely mined and is used as a fertilizer and as the main constituent in many forms of plaster, drywall …
Gypsum is one of the most important minerals on earth, and its dehydration product, plaster of paris, is mainly used as a building material. ... Part I. Kinetics of dehydration of calcium sulphate dihydrate. J. Chem. Soc. A 1969, 0, 1633–1637. 10.1039/j19690001633.
Gypsum (calcium sulfate dihydrate) is one of the most used inorganic binding materials in the world. During calcination, calcium sulfate subhydrates are formed and, for technical reasons, are mixed with water …
Calcium(II) sulfate dihydrate, Gypsum stone, Hydrated calcium sulfate, Mineral white [Note: Gypsum is the dihydrate form of calcium sulfate; Plaster of Paris is the hemihydrate form.] White or nearly white, odorless, crystalline solid. Skip directly to site content Skip directly to page options ...
Gypsum is the dihydrate form of calcium sulfate. The word "gypsum," however, is used to describe different phases of the same material, including anhydrite (calcium sulfate, with no water of crystallization), selenite, calcined gypsum, and plaster of Paris. It forms as evaporites from marine ...
The only chemical difference between anhydrite gypsum and dihydrate gypsum is the two water molecules. On the chemical side, calcium sulfate helps reduce sodium and magnesium toxicity by reacting with the soluble elements in the soil and leeching it from the soil solution and the root zone. It is also a soil treatment, useful both for modifying ...
Characteristics & Properties of Gypsum. Composition: Calcium sulfate dihydrate (CaSO₄·2H₂O). This means gypsum is a hydrated sulfate mineral, containing calcium, sulfur, and chemically bound water …
Dihydrate gypsum was provided by China National Pharmaceutical Industry Corporation ltd. The chemical compositions of CAC, β-hemihydrate, and dihydrate are listed in Table 1 ; their specific surface areas were calculated to be 346, 324, and 330 m 2 /kg, respectively.
: Greenway Biotech Gypsum Powder Calcium Sulfate to Improves Soil Drainage and Soil Water Relations- Water Soluble Contains 97% Calcium Sulfate Dihydrate, 22.5% Calcium, and 18% Sulfur (1 Pound) : Patio, Lawn & Garden
Gypsum is a calcium sulfate dihydrate which has many applications as a plaster and concrete additive, as well as a soil fertilizer and conditioner.
Calcium Sulfate Hemihydrate, also known as plaster of Paris, is a material made from gypsum that has been used for centuries in construction and various medical …
Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate (CaSO4·2H2O). It is renowned for its wide use in the manufacturing of plaster, drywall, and fertilizers.
Gypsum factoids Calcium sulfate dihydrate ... Gypsum Type Yield US1A Tuber Ca cwt/a % % None 371 70 0.13 Pelletized 418 72 0.20 Sieved 419 72 0.19 Source: Simmons et al., 1988. Ca applied (lb/a) 0 500 1000 1500 2000 2500 3000 3500
However, since gypsum is a natural material, pure gypsum is rarely found. Natural gypsum typically contains up to 15 to 20% impurities such as lime, clay and sand2,3. Purity of gypsum is important to know, e.g. plasterboard typically requires a minimum of 70% gypsum. Synthetic/FGD Gypsum An alternative source of gypsum is
ChemSpider record containing structure, synonyms, properties, vendors and database links for Calcium sulfate dihydrate, 10101-41-4, Gypsum Accessed: Mon, 16 Sep 2024 17:57:27 GMT Simple
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