Geographic Minerals

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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Lautite: Properties and Occurrences

Lautite: Properties and Occurrences

Lautite is a rare mineral belonging to the class of sulfides and sulfosalts with the general formula CuAsS. It is a mineral consisting of a sulfide and arsenide of copper possibly related to arsenopyrite. It is a mixed arsenide and sulfide of copper from Lauta near Marienberg, Saxony. First ident.....

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Laurite: Properties and Occurrences

Laurite: Properties and Occurrences

Laurite is an opaque black, metallic ruthenium sulfide mineral with formula: RuS2. It is a mineral consisting of an iron-black ruthenium sulfide often containing osmium and found in minute crystals or grains. It is in the pyrite structural group. Though rare, it occurs in many parts of the world......

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Laurionite: Properties and Occurrences

Laurionite: Properties and Occurrences

Laurionite, [formula – PbCl(OH)] is a lead halide mineral. It is a colourless mineral composed of basic lead chloride, occurring in prismatic crystals; it is dimorphous with paralaurionite. It forms colourless to white crystals in the orthorhombic crystal system and is dimorphous with paral.....

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Laumontite: Properties and Occurrences

Laumontite: Properties and Occurrences

Laumontite is a mineral, one of the zeolite group. It is a white monoclinic mineral consisting of a hydrous calcium and aluminium silicate. Its molecular formula is Ca(AlSi2O6)2·4H2O, a hydrated calcium-aluminium silicate. Potassium or sodium may substitute for the calcium but only in very small.....

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Larnite: Properties and Ooccurrences

Larnite: Properties and Ooccurrences

Larnite is a member of the olivine group of minerals. It is a calcium silicate mineral with formula: Ca2 SiO4. It is a mineral consisting of the unstable beta form of calcium silicate, found in limestone or chalk in contact with semi molten basalts. It is a grey mineral that is a metastable monoc.....

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Laplandite: Properties and Occurrences

Laplandite: Properties and Occurrences

Laplandite has a general formula of Na4CeTiPO4Si7O18•52O, and is found primarily in igneous rocks. This silicate mineral has been found as inclusions in pegmatites, primarily in the Kola Peninsula in Lappland, where the mineral’s name gets its origin. Because of Laplandite’s sodium .....

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Lanthanites: Properties and Occurrences

Lanthanites: Properties and Occurrences

Lanthanites are a group of isostructural rare earth element (REE) carbonate minerals. It is a mineral generally composed of hydrous lanthanum carbonate occurring in white crystals or earthy. This group comprises the minerals lanthanite-(La), lanthanite-(Ce), and lanthanite-(Nd). This mineral grou.....

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Lansfordite: Properties and Occurrences

Lansfordite: Properties and Occurrences

Lansfordite is a hydrated magnesium carbonate mineral with composition: MgCO3·5H2O. It is a soft monoclinic hydrated magnesium carbonate mineral. It is a mineral composed of a hydrous basic carbonate of magnesium like paraffin when first taken out of the ground but altering to nesquehonite on ex.....

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Langite: Properties and Occurrences

Langite: Properties and Occurrences

Langite is a rare hydrated copper sulfate mineral, with hydroxyl, found almost exclusively in druses of small crystals. It is a mineral [Cu4(SO4)(OH)6·2H2O] composed of a basic hydrous sulfate of copper. It is formed from the oxidation of copper sulfides and was first described in specimens from.....

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Langbeinite: Properties and Occurrences

Langbeinite: Properties and Occurrences

Langbeinite is a potassium magnesium sulfate mineral with the chemical formula K2Mg2(SO4)3. Langbeinite crystallizes in the isometric-tetartoidal system as transparent colorless or white with pale tints of yellow to green and violet crystalline masses. It is a unique source of plant nutrition sin.....

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Lanarkite: Properties and Occurrences

Lanarkite: Properties and Occurrences

Lanarkite is a mineral, a form of lead sulfate with formula Pb2(SO4)O. It is a mineral consisting of sulphate of lead, occurring either massive or in long slender prisms, of a greenish white or gray color. It was originally found at Leadhills in the Scottish county of Lanarkshire, hence the name......

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