efflorescence of gypsum

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• Efflorescence — Effloresce redirects here, for the album by Oceansize, see Effloresce (album). Efflorescence, in chemistry, is the loss of water (or a solvent) of crystallization from a hydrated or solvated salt to the atmosphere on exposure to air.Examples# A 5 …   Wikipedia

• art conservation and restoration — Maintenance and preservation of works of art, their protection from future damage, deterioration, or neglect, and the repair or renovation of works that have deteriorated or been damaged. Research in art history has relied heavily on 20th and… …   Universalium

• gypsite —    An earthy gypsum (CaSO4·2H2O) variety that contains various quantities (i.e., < 50%) of soil material, silicate clay minerals, and sometimes other salts (e.g. NaCl); found only in arid or semiarid regions as secondary precipitation… …   Glossary of landform and geologic terms

• Marcellus Formation — Stratigraphic range: Middle Devonian …   Wikipedia

• India — /in dee euh/, n. 1. Hindi, Bharat. a republic in S Asia: a union comprising 25 states and 7 union territories; formerly a British colony; gained independence Aug. 15, 1947; became a republic within the Commonwealth of Nations Jan. 26, 1950.… …   Universalium

• Concrete — This article is about the construction material. For other uses, see Concrete (disambiguation). Outer view of the Roman Pantheon, still the largest unreinforced solid concrete dome.[1] …   Wikipedia

• Vicon — Cement VICON or high performance cement can be made to order: from super strong cements with rugged durability to low cost cements with up to 70% mineral additives. To use a high volume of mineral additives (sand, limestone, natural pozzolans or… …   Wikipedia

• Egypt — /ee jipt/, n. 1. Arab Republic of. a republic in NE Africa. 64,791,891; 386,198 sq. mi. (1,000,252 sq. km). Cap.: Cairo. Arabic, Misr. Formerly (1958 71), United Arab Republic. 2. an ancient kingdom in NE Africa: divided into the Nile Delta… …   Universalium

• trona — /troh neuh/, n. a monoclinic mineral, grayish or yellowish hydrous sodium carbonate and bicarbonate, Na2CO3·NaHCO3·2H2, occurring in dried or partly evaporated lake basins. [1790 1800; < Sp < dial. Ar tron, aph. var. of NATRUN NATRON] * * * ▪… …   Universalium

• arts, East Asian — Introduction       music and visual and performing arts of China, Korea, and Japan. The literatures of these countries are covered in the articles Chinese literature, Korean literature, and Japanese literature.       Some studies of East Asia… …   Universalium