polyhalite

      a sulfate mineral in evaporite deposits [K2Ca2Mg(SO4)4·2H2O] that often occurs with anhydrite and halite. Its name, from the Greek words meaning “many salts,” reflects its composition, hydrated sulfates of potassium, calcium, and magnesium. It makes up 7 percent of the rock in the salt deposits at Stassfurt, Ger., and is also abundant in the salt deposits of the Saratov region of Russia, where certain beds consist of 85 percent polyhalite. The Texas–New Mexico potash region is another noteworthy locality. For detailed physical properties, see sulfate mineral (table).

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Universalium. 2010.

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  • POLYHALITE — La polyhalite est un sulfate hydraté de potassium, de calcium et de magnésium: K2Ca2Mg(SO4)4,2 H2O. D’allure massive ou parfois fibreuse, la polyhalite cristallise dans le système triclinique; les cristaux en tablette sont petits et rares.… …   Encyclopédie Universelle

  • Polyhalite — is an evaporite mineral, a hydrated sulfate of potassium, calcium and magnesium with formula: K2Ca2Mg(SO4)4 middot;2(H2O). Polyhalite crystallizes in the triclinic system although crystals are very rare. The normal habit is massive to fibrous. It …   Wikipedia

  • Polyhalite — Pol y*ha lite, n. [Poly + Gr. ? salt.] (Min.) A mineral usually occurring in fibrous masses, of a brick red color, being tinged with iron, and consisting chiefly of the sulphates of lime, magnesia, and soda. [1913 Webster] …   The Collaborative International Dictionary of English

  • polyhalite — polihalitas statusas T sritis chemija apibrėžtis Mineralas. formulė K₂Ca₂Mg[SO₄]₄·2H₂O atitikmenys: angl. polyhalite rus. полигалит …   Chemijos terminų aiškinamasis žodynas

  • polyhalite — noun A mineral usually occurring in fibrous masses, of a brick red color, being tinged with iron, and consisting chiefly of the sulphates of lime, magnesia, and soda …   Wiktionary

  • polyhalite — poly·halite …   English syllables

  • polyhalite — ˌ ̷ ̷ ̷ ̷ˈhaˌlīt, ˈhā noun ( s) Etymology: German polyhalit, from poly + hal + it ite : a mineral K2MgCa2(SO4)4.2H2O occurring usually in fibrous masses of a brick red color due to iron but consisting essentially of hydrous sulfate of calcium,… …   Useful english dictionary

  • Polyhalit — Chemische Formel K2Ca2Mg[SO4]4 • 2H2O Mineralklasse Sulfate, Selenate, Tellurate, Chromate, Molybdate und Wolframate 7.CC.65 (8. Auflage: VI/C.20 10) (nach Strunz) 29.04.05.01 (nach Dana) Kristallsystem triklin (pseudo orthorhombisch) …   Deutsch Wikipedia

  • Evaporite — Cobble encrusted with halite evaporated from the Dead Sea, Israel. Evaporite (  / …   Wikipedia

  • List of minerals N-R (complete) — It is currently not possible to have a complete list of minerals . The International Mineralogical Association is the international group that recognises new minerals and new mineral names, however minerals discovered before 1959 did not go… …   Wikipedia

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