Geographic Minerals

Libethenite: Properties and Occurrences

Libethenite: Properties and Occurrences

Libethenite is a rare copper phosphate hydroxide mineral. It forms striking, dark green orthorhombic crystals. It is a secondary copper phosphate mineral found in the oxidized zone of copper ore deposits. It is an olive green orthorhombic mineral consisting of a basic copper phosphate and occurri.....

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Levyne: Properties and Occurrence

Levyne: Properties and Occurrence

Levyne or levynite is a zeolite mineral, i.e. a hydrated silicate mineral. It is a whitish, reddish, or yellowish, transparent or translucent mineral, allied to chabazite. Levyne crystallizes in the Trigonal – Hexagonal Scalenohedral class. It typically occurs as radiating clusters or fibro.....

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Leucophoenicite: Properties and Occurrences

Leucophoenicite: Properties and Occurrences

Leucophoenicite is a mineral with formula Mn7(SiO4)3(OH)2. It is a mineral consisting of a manganese silicate. Generally brown to red or pink in color, the mineral gets its name from the Greek words meaning “pale purple-red”. Leucophoenicite was discovered in New Jersey, US and identi.....

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Leucophanite: Properties and Occurrences

Leucophanite: Properties and Occurrences

Leucophanite is an inosilicate mineral with a complex composition, [(Na, Ca)2BeSi2(O.OH.F)7]. It may contain cerium substituting in the calcium position. It is a mineral consisting of a beryllium sodium calcium silicate with fluorine occurring in glassy greenish tabular crystals. It is a sorosili.....

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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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