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2. Calcium sulfate - Wikipedia

   en.wikipedia.org/wiki/Calcium_sulfate

   Calcium sulfate (or calcium sulphate) is the inorganic compound with the formula CaSO 4 and related hydrates. In the form of γ- anhydrite (the anhydrous form), it is used as a desiccant . One particular hydrate is better known as plaster of Paris , and another occurs naturally as the mineral gypsum .

3. Gypsum - Wikipedia

   en.wikipedia.org/wiki/Gypsum

   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.

4. List of desiccants - Wikipedia

   en.wikipedia.org/wiki/List_of_desiccants

   Calcium hydride; Calcium oxide; Calcium sulfate (Drierite) Cobalt(II) chloride; Copper(II) sulfate; Lithium chloride; Lithium bromide; Magnesium chloride hexahydrate;

5. Hard water - Wikipedia

   en.wikipedia.org/wiki/Hard_water

   Hard water also forms deposits that clog plumbing. These deposits, called "scale", are composed mainly of calcium carbonate (CaCO 3), magnesium hydroxide (Mg(OH) 2), and calcium sulfate (CaSO 4). [3] Calcium and magnesium carbonates tend to be deposited as off-white solids on the inside surfaces of pipes and heat exchangers.

6. Phosphogypsum - Wikipedia

   en.wikipedia.org/wiki/Phosphogypsum

   Phosphogypsum (PG) is the calcium sulfate hydrate formed as a by-product of the production of fertilizer, particularly phosphoric acid, from phosphate rock. It is mainly composed of gypsum (CaSO 4 ·2H 2 O).

7. Anhydrite - Wikipedia

   en.wikipedia.org/wiki/Anhydrite

   This transformation is reversible, with gypsum or calcium sulfate hemihydrate forming anhydrite by heating to around 200 °C (400 °F) under normal atmospheric conditions. [6] Anhydrite is commonly associated with calcite, halite, and sulfides such as galena, chalcopyrite, molybdenite, and pyrite in vein deposits.

8. Biggest problems facing College Football Playoff remain — and ...

   www.aol.com/sports/biggest-problems-facing...

   After all the hand-wringing and consternation, the first 12-team playoff is set. If three simple changes were made, there would be a lot less fretting — and it would put the sport (and the ...

9. Selenite (mineral) - Wikipedia

   en.wikipedia.org/wiki/Selenite_(mineral)

   Selenite, satin spar, desert rose, and gypsum flower are crystal habit varieties of the mineral gypsum.. All varieties of gypsum, including selenite and alabaster, are composed of calcium sulfate dihydrate (meaning that it has two molecules of water), with the chemical formula CaSO 4 ·2H 2 O. Selenite contains no significant selenium – The similar names both derive from Greek selḗnē ...