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siderite

(Encyclopedia)siderite kălˈĭbīt [key], a mineral, varying in color from brown, green, or gray to black and occurring in nature in massive and crystalline form. A carbonate of iron, FeCO3, it serves as an iron o...

rejería

(Encyclopedia)rejería rāhārēˈä [key], the art of making iron screens and grilles, developed in Spain from the Romanesque period through the Renaissance. It employs chiseled and hammered metal as well as wroug...

magnetite

(Encyclopedia)magnetite măgˈnətīt [key], lustrous black, magnetic mineral, Fe3O4. It occurs in crystals of the cubic system, in masses, and as a loose sand. It is one of the important ores of iron (magnetic iro...

Ilkeston

(Encyclopedia)Ilkeston ĭlˈkĕstən [key], town , Derbyshire, central England. Iron and coal mines lie to the ...

Baotou

(Encyclopedia)Baotou or Paotow both: bou-tō [key], city (1994 est. pop. 1,032,900), Inner Mongolian Autonomous Region, China. A port and major trade center on the Huang He (Yellow River), it is connected by rail w...

Taiyuan

(Encyclopedia)Taiyuan tī-yüän [key], city (1994 est. pop. 1,642,300), capital of Shanxi prov., N China, on the Fen River, in one of the world's richest coal and iron areas. It is a mining and smelting center wit...

Narvik

(Encyclopedia)Narvik närˈvĭk [key], city (1995 pop. 18,899), Nordland co., N Norway, an ice-free port on the Ofotfjord opposite the Lofoten Islands. It was founded (1887) as the Atlantic port for the Kiruna and ...

taconite

(Encyclopedia)taconite, low-grade iron ore, a flintlike rock usually containing less than 30% iron. Resistant to drilling and to the extraction of its contained metal, the rock was long considered worthless. Experi...

equivalent weight

(Encyclopedia)equivalent weight. The equivalent weight of an element or radical is equal to its atomic weight or formula weight divided by the valence it assumes in compounds. The unit of equivalent weight is the a...

Anshan

(Encyclopedia)Anshan änˈshänˈ [key], city (1994 est. pop. 1,251,700), central Liaoning prov., China, on a branch of the South Liaoning RR. Its huge integrated iron and steel complex is the largest in China. It ...