franklinite

American  

[frangk-li-nahyt] / ˈfræŋk lɪˌnaɪt /

noun

1. a mineral of the spinel group, an oxide of zinc, manganese, and iron, occurring in black octahedral crystals or in masses: formerly mined for zinc.

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franklinite British  

/ ˈfræŋklɪˌnaɪt /

noun

1. a black mineral consisting of an oxide of iron, manganese, and zinc: a source of iron and zinc. Formula: (Fe,Mn,Zn) (Fe,Mn) 2 O 4

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Etymology

Origin of franklinite

1810–20, named after Franklin, New Jersey, where it is found; -ite ¹

Example Sentences

Commercially it is often made from franklinite in the following way.

From An Elementary Study of Chemistry by McPherson, William

This extremely white and fine pigment is prepared by the roasting and sublimation of franklinite, zincite, and other zinc-bearing ores largely found in New Jersey.

From Paint Technology and Tests by Gardner, Henry A.

Herring was another American who invented celebrated safes, made with a boiler-iron exterior, a hardened steel inner safe, with the interior filled with a casting of franklinite around rods of soft steel.

From Inventions in the Century by Doolittle, William Henry

The franklinite is mixed with coal and heated to a high temperature in a furnace, by which process the zinc is set free and converted into vapor.

From An Elementary Study of Chemistry by McPherson, William