en.wikipedia.org/wiki/Calcium_sulfate#:~:text=From Wikipedia, the free encyclopedia Calcium sulfate (or,and another occurs naturally as the mineral gypsum.
- From Wikipedia, the free encyclopedia 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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Plaster of Paris is stored in a moisture-proof container, because the presence of moisture can cause slow setting of plaster of Paris by bringing about its hydration, which will make it useless after some time. When the dry plaster powder is mixed with water, it rehydrates over time into gypsum.
Calcium sulfate is the inorganic compound with the formula CaSO4 and related hydrates. In the form of γ-anhydrite, it is used as a desiccant. One particular hydrate is better known as plaster of Paris, and another occurs naturally as the mineral gypsum. It has many uses in industry. All forms are white solids that are poorly soluble in water. Calcium sulfate causes permanent hardness in water.
- 136.14 g/mol (anhydrous), 145.15 g/mol (hemihydrate), 172.172 g/mol (dihydrate)
- 1,460 °C (2,660 °F; 1,730 K) (anhydrous)
- 0.21g/100ml at 20 °C (anhydrous), 0.24 g/100ml at 20 °C (dihydrate)
From Wikipedia, the free encyclopedia (Redirected from Plaster of Paris (song)) Head Carrier is the sixth studio album by the American alternative rock band the Pixies, released on September 30, 2016 on Pixiesmusic and PIAS.
plaster of Paris (POP) n. a preparation of gypsum (calcium sulphate) that sets hard when water is added. It is used in dentistry and orthopaedics for preparing plaster casts.
Plaster is a material similar to mortar and cement. Plaster of Paris is one kind, made from gypsum by heating it. It is used to make copies of footprints, fossils, skeletons, and other things. Other kinds are used for buildings and other purposes. This short article can be made longer.
Plaster mold casting is a metalworking casting process similar to sand casting except the molding material is plaster of Paris instead of sand. Like sand casting, plaster mold casting is an expendable mold process, however it can only be used with non-ferrous materials. It is used for castings as small as 30 g to as large as 7–10 kg. Generally, the form takes less than a week to prepare. Production rates of 1–10 units/hr can be achieved with plaster molds. Parts that are typically made ...
From Wikipedia, the free encyclopedia Plaster has been listed as a level-5 vital article in Technology. If you can improve it, please do. This article has been rated as C-Class.
In medieval and Renaissance times, gesso (usually made of plaster of paris mixed with glue) was applied to wood panels, plaster, stone, or canvas to provide the ground for tempera and oil painting. Plaster of paris is prepared by heating calcium sulfate dihydrate, or gypsum, to 120–180 °C (248–356 °F). With an additive to retard the set, it is called wall, or hard wall, plaster, which can provide passive fire protection for interior surfaces.