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List Of Minerals Recognized By The International Mineralogical Association (L)
__TOC__ L La – Le # Laachite (zirconolite: IMA2012-100) 4. o () # Labuntsovite (labuntsovite) 9.CE.30e ##Labuntsovite-Fe (IMA1998-051a) 9.CE.30 o##Labuntsovite-Mg (IMA1998-050a) 9.CE.30 [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Labradorite Polie 3(Madagascar)
Labradorite (( Ca, Na)( Al, Si)4 O8) is a calcium-enriched feldspar mineral first identified in Labrador, Canada, which can display an iridescent effect (schiller). Labradorite is an intermediate to calcic member of the plagioclase series. It has an anorthite percentage (%An) of between 50 and 70. The specific gravity ranges from 2.68 to 2.72. The streak is white, like most silicates. The refractive index ranges from 1.559 to 1.573 and twinning is common. As with all plagioclase members, the crystal system is triclinic, and three directions of cleavage are present, two of which are nearly at right angles and are more obvious, being of good to perfect quality (while the third direction is poor). It occurs as clear, white to gray, blocky to lath shaped grains in common mafic igneous rocks such as basalt and gabbro, as well as in anorthosites. Occurrence The geological type area for labradorite is Paul's Island near the town of Nain in Labrador, Canada. It has also been repo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lammerite
Copper arsenate (Cu3(AsO4)2·4H2O, or Cu5H2(AsO4)4·2H2O), also called copper orthoarsenate, tricopper arsenate, cupric arsenate, or tricopper orthoarsenate, is a blue or bluish-green powder insoluble in water and alcohol and soluble in aqueous ammonium and dilute acids. Its CAS number is or . Uses Copper arsenate is an insecticide used in agriculture. It is also used as a herbicide, fungicide, and a rodenticide. It is also used as a poison in slug baits. Copper arsenate can also be a misnomer for copper arsenite, especially when meant as a pigment. Natural occurrences Anhydrous copper arsenate, Cu3(AsO4)2, is found in nature as the mineral lammerite. Copper arsenate tetrahydrate, Cu3(AsO4)2·4H2O, occurs naturally as the mineral rollandite. Related compounds Copper arsenate hydroxide or basic copper arsenate (Cu(OH)AsO4) is a basic variant with CAS number . It is found naturally as the mineral olivenite. It is used as an insecticide, fungicide, and miticide. Its use is banned ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lahnsteinite
Lahnsteinite is a basic sulfate mineral first discovered in the Friedrichssegen Mine, Germany in a goethite cavity. Though found in goethite, the crystals of Lahnsteinite are few millimeters in size, and are tabular shaped. Lahnsteinite was the first mineral discovered in the Lahn Valley deposits. The empirical formula for lahnsteinite is (Zn3.3,Fe0.27,Cu0.11)3.91(S0.98O4)(OH)5*3H2.10O. Occurrence Lahnsteinite was first found in a cavernous kidney-like goethite. Typically Lahnsteinite is found near goethite, pyromorphite, quartz and native copper. When found with these minerals, the Lahnsteinite crystals are overgrowing the walls of several cavities. Lahnsteinite is a uniquely rare mineral, as it occurs in very small amounts in two known locations around the world. The first location is in the mine it was found in, just outside of Lahnstein Germany, the second, in a small mine in southern California. Physical properties Lahnsteinite is a colorless or lightly blue colored transpare ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
