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efflorescence |
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efflorescence: see hydrate hydrate , chemical compound that contains water. A common hydrate is the familiar blue vitriol, a crystalline form of cupric sulfate. Chemically, it is cupric sulfate pentahydrate, CuSO4·5H2O.
..... Click the link for more information. . efflorescence 1. Chem Geology a. the process of efflorescing b. the powdery substance formed as a result of this process, esp on the surface of rocks 2. any skin rash or eruption efflorescence [‚ef·lə′res·əns] (botany) The period or process of flowering. (chemistry) The property of hydrated crystals to lose water of hydration and crumble when exposed to air. (materials) A crust of salts, usually white, that forms on the surface of stone, brick, plaster, or mortar because of leaching of free alkalies from adjacent concrete or mortar. (mineralogy) A whitish powder, consisting of one or several minerals produced as an encrustation on the surface of a rock in an arid region. Also known as bloom. efflorescence An encrustation of soluble salts, commonly white, deposited on the surface of stone, brick, plaster, or mortar; usually caused by free alkalies leached from mortar or adjacent concrete as moisture moves through it. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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