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GALMEI [1 record]

Record 1 2011-01-10

English

Subject field(s)
  • Mineralogy
Universal entry(ies)
Zn4Si2O7(OH)2•H2O
formula, see observation
DEF

A white or colorless to pale-green, blue, or yellow orthorhombic mineral [which] is similar to smithsonite, but is distinguished from it by strong pyroelectric properties.

CONT

Hemimorphite is a common secondary mineral, and is an ore of zinc.

OBS

hemimorphite: ... formerly called calamine in America.

OBS

... often confused with smithsonite [which is] a zinc carbonate ZnCO3 [whereas] hemimorphite [is] a zinc silicate ...

OBS

Chemical formula: Zn4Si2O7(OH)2•H2O

OBS

calamine: This name is disapproved by the Commission of New Minerals and Mineral Names of the International Mineralogical Association ...

OBS

The International Mineralogical Association ... have defined calamine as the silicate of zinc. However, in practice, calamine may refer to either the silicate [hemimorphite], the carbonate [smithsonite] or both.

French

Domaine(s)
  • Minéralogie
Entrée(s) universelle(s)
Zn4Si2O7(OH)2•H2O
formula, see observation
DEF

Silicate de zinc hydraté [que l'] on [...] trouve dans les filons de zinc, associé à la blende et à la smithsonite [et qui le] plus souvent, [...] se présente en agrégats encroûtants, de couleur claire, blanche, grise, quelquefois veinés en bleu, vert, brun, selon des incrustations successives [...]

CONT

La calamine est phosphorescente; de plus, ses cristaux présentent admirablement le phénomène dit de pyroélectricité [...]

CONT

La vraie calamine, qui est un hydrosilicate, se présente en masses rognonneuses de couleurs variées, à éclat vitreux. Ces masses sont mélangées aux autres minerais pour former la terre calaminaire [...]

OBS

calamine : ce nom a parfois été donné au carbonate de zinc, qui est la smithsonite.

OBS

Formule chimique : Zn4Si2O7(OH)2•H2O

Spanish

Campo(s) temático(s)
  • Mineralogía
Entrada(s) universal(es)
Zn4Si2O7(OH)2•H2O
formula, see observation
DEF

Silicato de cinc hidratado, que es una mena de este metal; sus cristales son incoloros o azulados, amarillentos o verdosos y adoptan la forma de prismas pequeños o de tabletas.

OBS

Fórmula química: Zn4Si2O7(OH)2•H2O

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