Köttigite and Sphalerite

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Difference between Köttigite and Sphalerite

Köttigite vs. Sphalerite

Köttigite is a rare hydrated zinc arsenate which was discovered in 1849 and named by James Dwight Dana in 1850 in honour of Otto Friedrich Köttig (1824 - 1892), a German chemist from Schneeberg, Saxony, who made the first chemical analysis of the mineral. Sphalerite ((Zn, Fe)S) is a mineral that is the chief ore of zinc.

Calcite

Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (CaCO3).

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Cleavage (crystal)

Cleavage, in mineralogy, is the tendency of crystalline materials to split along definite crystallographic structural planes.

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Cumbria

Cumbria is a ceremonial and non-metropolitan county in North West England.

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Fluorescence

Fluorescence is the emission of light by a substance that has absorbed light or other electromagnetic radiation.

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Galena

Galena, also called lead glance, is the natural mineral form of lead(II) sulfide.

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Hermann–Mauguin notation

In geometry, Hermann–Mauguin notation is used to represent the symmetry elements in point groups, plane groups and space groups.

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Iron

Iron is a chemical element with symbol Fe (from ferrum) and atomic number 26.

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Lustre (mineralogy)

Lustre or luster is the way light interacts with the surface of a crystal, rock, or mineral.

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Mexico

Mexico (México; Mēxihco), officially called the United Mexican States (Estados Unidos Mexicanos) is a federal republic in the southern portion of North America.

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Mohs scale of mineral hardness

The Mohs scale of mineral hardness is a qualitative ordinal scale characterizing scratch resistance of various minerals through the ability of harder material to scratch softer material.

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Ore

An ore is an occurrence of rock or sediment that contains sufficient minerals with economically important elements, typically metals, that can be economically extracted from the deposit.

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Refractive index

In optics, the refractive index or index of refraction of a material is a dimensionless number that describes how light propagates through that medium.

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Specific gravity

Specific gravity is the ratio of the density of a substance to the density of a reference substance; equivalently, it is the ratio of the mass of a substance to the mass of a reference substance for the same given volume.

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Zinc

Zinc is a chemical element with symbol Zn and atomic number 30.

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