Geographic Minerals

Leucite: Properties and Occurrences

Leucite: Properties and Occurrences

Leucite is a rock-forming mineral composed of potassium and aluminum tectosilicate K[AlSi2O6]. It is a member of the feldspathoid group, forming directly from cooling lava in volcanic rock. It is a white or gray mineral, found in potassium-rich igneous rocks; potassium aluminum silicate. Leucite .....

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Letovicite: Properties and Occurrences

Letovicite: Properties and Occurrences

Letovicite is an ammonium sulfate mineral with composition (NH4)3H(SO4)2. It is a mineral consisting of an acid ammonium sulfate. Also consists of triclinic mineral containing hydrogen, hydrogen, nitrogen, oxygen, and sulfur. It is a rare colorless or white monoclinic secondary mineral formed dur.....

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Lepidolite: Properties and Occurrences

Lepidolite: Properties and Occurrences

Lepidolite is a lilac-gray or rose-colored member of the mica group of minerals with the formula [K(Li, Al, Rb)2(Al, Si)4O10(F, OH)2]. It is a mineral of the mica group containing lithium, typically grey or lilac in color. It occurs in granite pegmatites, in some high-temperature quartz veins, gr.....

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Lepidocrocite: Properties and Occurrences

Lepidocrocite: Properties and Occurrences

Lepidocrocite [γ-FeO(OH)], also called esmeraldite or hydro hematite, is an iron oxide-hydroxide mineral. It is a red to reddish-brown mineral consisting of iron oxide hydroxide; often found in iron ores together with goethite. It was first described in 1813 from the Zlaté Hory polymetallic ore.....

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Leightonite: Properties and Occurrences

Leightonite: Properties and Occurrences

Leightonite is a rare sulfate mineral with a formula of K2Ca2Cu(SO4)4•2H2O. It is a mineral consisting of a hydrous sulfate of copper, calcium, and potassium. It was named after Tomas Leighton Donoso, a Chilean mining engineer, and Professor of Mineralogy at the University of Santiago in Chile......

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Leifite: Properties and Occurrences

Leifite: Properties and Occurrences

Leifite is a rare tectosilicate. It a mineral consisting of a rare fluoride and silicate of sodium and aluminum. It is a rather rare and obscure beryllium silicate mineral. Tectosilicates are built on a framework of tetrahedra with silicon or aluminum at the center and oxygen at the vertices; the.....

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Legrandite: Properties And Occurrences

Legrandite: Properties And Occurrences

Legrandite is a rare zinc arsenate mineral, Zn2(AsO4)(OH)·(H2O). It is a mineral consisting of a hydrous basic arsenate of zinc. It is a rare and beautiful mineral that is a favorite of mineral collectors. It is an uncommon mineral that occurs in oxidized zinc-arsenic bearing deposits and can be.....

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Leadhillite: Properties and Occurrences

Leadhillite: Properties and  Occurrences

Leadhillite is a lead sulfate carbonate hydroxide mineral, often associated with anglesite. It is a monoclinic mineral of a yellowish or greenish white color consisting of basic sulfate and carbonate of lead. It has the formula Pb4SO4(CO3)2(OH)2. It can fluoresce a pale yellow under ultraviolet l.....

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Lazurite: Properties and Occurrences

Lazurite: Properties and Occurrences

Lazurite is a tectosilicate mineral with sulfate, sulfur and chloride with formula: (Na, Ca)8[(S, Cl, SO4, OH)2|(Al6Si6O24)]. It is fairly complex as minerals go, combining aluminum silicates with sodium, calcium, sulfur, chlorine and sulfates. The result is a rich, brilliant blue color. It is a .....

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Lazulite: Properties and Occurrences

Lazulite: Properties and Occurrences

Lazulite, formula – [(Mg, Fe2+)Al2(PO4)2(OH)2] is a blue, phosphate mineral containing magnesium, iron, and aluminum phosphate. It is a member of the Phosphate family. It is a magnesium iron aluminum phosphate hydroxide that belongs to the phosphate class of minerals. It forms one endmember of .....

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Lawsonite: Properties and Occurrences

Lawsonite: Properties and Occurrences

Lawsonite is a hydrous calcium aluminum sorosilicate mineral with formula CaAl2Si2O7(OH)2·H2O. It is a pale or grayish blue mineral in prismatic orthorhombic crystals consisting of hydrous calcium aluminum silicate. It is a metamorphic mineral typical of the blueschist facies. It also occurs as .....

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Lavendulan: Properties and Occurrences

Lavendulan: Properties and Occurrences

Lavendulan is an uncommon copper arsenate mineral, known for its characteristic intense electric blue color. It is an orthorhombic mineral containing arsenic, calcium, chlorine, copper, hydrogen, oxygen, and sodium. Lavendulan is an uncommon mineral in oxidized copper deposits and can be found in.....

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