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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...

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...

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 ...

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....