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manganese

(Encyclopedia)manganese măngˈgənēs, mănˈ– [key] [Lat.,=magnet], metallic chemical element; symbol Mn; at. no. 25; at. wt. 54.93805; m.p. about 1,244℃; b.p. about 1,962℃; sp. gr. 7.2 to 7.45, depending o...

dvi-manganese

(Encyclopedia)dvi-manganese: see rhenium.

Periodic Table of the Elements: Manganese

(Encyclopedia)Periodic Table of the Elements: Manganese ...

Chiatura

(Encyclopedia)Chiatura chēəto͞oˈrə [key], city (1989 pop. 29,228), S central Georgia, on the Kvirila River. One of the world's largest manganese producers, Chiatura alone accounted for half of the world's mang...

Nikopol, city, Ukraine

(Encyclopedia)Nikopol nyĭkôˈpəl [key], city (1989 pop. 158,000), SE Ukraine, on the Dnieper River. It is a rail terminus and the industrial center of one of the world's richest manganese-mining areas. The city ...

magnalium

(Encyclopedia)magnalium măgnāˈlēəm [key], alloy of aluminum and about 5% magnesium. Although weak and soft in the elemental state, magnesium alloys with aluminum, manganese, zinc, tin, zirconium, and cerium to...

pyrolusite

(Encyclopedia)pyrolusite pīˈrōlo͞ozīt [key], naturally occurring manganese dioxide, MnO2, a black mineral that crystallizes in the tetragonal system but is usually found in earthy or massive deposits. It is th...

Mn

(Encyclopedia)Mn, symbol for the element manganese. ...

ocher

(Encyclopedia)ocher ōˈkər [key], mixture of varying proportions of iron oxide and clay, used as a pigment. It occurs naturally as yellow ocher (yellow or yellow-brown in color), the iron oxide being limonite, or...

Unión, La

(Encyclopedia)Unión, La, town (1990 pop. 15,144), Murcia prov., SE Spain. It is a center for the rich lead, silver, iron, manganese, and zinc mines of the vicinity, which have been worked since Carthaginian times....