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单词 galena
释义

galena


Ga·le·na

G0014800 (gə-lē′nə) A city of extreme northwest Illinois on the Mississippi River. It was a prosperous port and the center of a lead-mining region during the 1800s.

ga·le·na

G0014800 (gə-lē′nə)n. A gray mineral, essentially PbS, the principal ore of lead.
[Latin galēna, lead ore.]

galena

(ɡəˈliːnə) or

galenite

n (Minerals) a grey mineral, found in hydrothermal veins. It is the chief source of lead. Composition: lead sulphide. Formula: PbS. Crystal structure: cubic[C17: from Latin: lead ore, dross left after melting lead]

ga•le•na

(gəˈli nə)

also ga•le•nite

(-naɪt)

n. a common heavy mineral, lead sulfide, PbS, occurring in lead-gray crystals, and cleavable masses: the principal ore of lead. [1595–1605; < Latin: lead ore]

ga·le·na

(gə-lē′nə) A gray, metallic mineral consisting of lead and sulfur. Galena usually occurs in cube-shaped crystals within veins of igneous rock or in sedimentary rocks. It is the main ore of lead.
Thesaurus
Noun1.galena - soft blue-grey mineralgalena - soft blue-grey mineral; lead sulfide; a major source of leadatomic number 82, Pb, lead - a soft heavy toxic malleable metallic element; bluish white when freshly cut but tarnishes readily to dull grey; "the children were playing with lead soldiers"mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition
Translations
galena

galena


galena

(gəlē`nə) or

lead glance,

lustrous, blue-gray mineral crystallizing usually in cubes, sometimes in octahedrons. It is the most important ore and the principal source of lead. It consists of lead sulfide, PbS, but frequently contains silver (it is mined for this metal in some localities) and other accessory metals. It is widely distributed throughout the world, occurring in veins and in bedded deposits, in Missouri, Idaho, Iowa, Wisconsin, and Utah in the United States (leading producer of lead) and in Australia, Canada, England, France, and Mexico. Galena crystals were once much used in radio "crystal" sets.

Galena

 

a mineral, lead sulfide (PbS), containing 86.6 percent lead.

Galena often occurs with admixtures of silver, bismuth, copper, zinc, or selenium. It crystallizes in a cubic system, producing separate crystals, dense masses, and granular aggregates. It is lead-gray in color with a metallic luster. Its hardness is 2.7-3 on the mineralogical scale, and its density is 7,400-7,600 kg/m3. Galena is an electrical conductor, and it shows a photoelectric effect that is sometimes positive and sometimes negative. It is diamagnetic. With a negative photoelectric effect it has detector properties. Galena is found in hydrothermal and some sedimentary deposits. In some cases, as in the Zavodinskoe bed in the Rudnyi Altai, galena forms almost monomineral ores, but more often it is accompanied by sphalerite, pyrite, and chalcopyrite. The largest deposits in the USSR are found in the Altai, the Northern Caucasus, Kazakhstan, Eastern Siberia, and Primor’e. It is found abroad in the USA, Canada, Australia, and countries of Africa. Galena is the principal ore used in lead smelting.

galena

[gə′lē·nə] (mineralogy) PbS A bluish-gray to lead-gray mineral with brilliant metallic luster, specific gravity 7.5, and hardness 2.5 on Mohs scale; occurs in cubic or octahedral crystals, in masses, or in grains. Also known as blue lead; lead glance.

galena

, galenite a grey mineral, found in hydrothermal veins. It is the chief source of lead. Composition: lead sulphide. Formula: PbS. Crystal structure: cubic

galena


lead sul·fide

PbS; the native form in which lead is chiefly found. Synonym(s): galena
AcronymsSeePBS
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更新时间：2024/11/14 1:46:00