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  1. www.britannica.com › technology › plaster-of-parisPlaster of paris | Definition, Uses, & History | Britannica

    plaster of paris, quick-setting gypsum plaster consisting of a fine white powder (calcium sulfate hemihydrate), which hardens when moistened and allowed to dry. Known since ancient times, plaster of paris is so called because of its preparation from the abundant gypsum found near Paris. Plaster of paris does not generally shrink or crack when ...

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  3. byjus.com › question-answer › why-we-call-hemiWhy we call hemihydrated calcium sulphate as plaster of paris

    Solution. Plaster is the common name for calcium sulphate hemi hydrate (CaSO4 . 1/2H2O) made by heating the mineral gypsum, the common name for sulphate of lime. Plaster was first made about 9000 years ago, and has been used by ancient Egyptian, Greek and Roman civilizations. However, it wasn't used on a large scale until 1700s, when it was ...

  4. material-properties.org › plaster-of-parisPlaster of Paris | Formula, Properties & Application

    Scientifically known as Calcium Sulfate Hemihydrate, Plaster of Paris is chemically represented as CaSO 4.1/2H 2 O. This represents the ratio of calcium sulfate to water, suggesting that for each molecule of calcium sulfate, there is half a molecule of water.

  5. www.sciencedirect.com › topics › chemistryCalcium Sulfate Hemihydrate - an overview - ScienceDirect

    Calcium sulfate hemihydrate (CaSO 4 ⋅ 1/2H 2 O), known as plaster of Paris, has been used as a building material for at least 5000 years and used by Egyptians to decorate burial tombs of pharaohs. 211 Dreesman was the first to report a study on the implantation of plaster of Paris as a bone filler material in eight patients. 212 Since this ...

  6. www.artmolds.com › blogs › mold-makingThe history, development and applications of Plaster of Paris

    Feb 18, 2024 · The production of plaster of Paris involves a process called calcination, where the gypsum is heated to remove the water content and create calcium sulfate hemihydrate. This material has many useful properties, including fire resistance and the ability to be easily molded.

  7. en.wikipedia.org › wiki › Calcium_sulfateCalcium sulfate - Wikipedia

    Infobox references. 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.

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  9. thisvsthat.io › calcium-sulfate-vs-plaster-of-parisCalcium Sulfate vs. Plaster of Paris - What's the Difference ...

    On the other hand, Plaster of Paris is a specific type of calcium sulfate hemihydrate that has been heated and then cooled to form a white, powdery substance. It is widely used in the medical field for casting broken bones and creating molds, as well as in arts and crafts for sculpting and creating decorative objects.

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