A variant of chalcanthite with the formula, (Cu,Zn,Mg)SO4 .5H (sub
2) O . Hey, 1
A member of the monoclinic melanterite group, in which iron is partially
replaced by zinc. English
A monoclinic mineral, (Zn,Cu,Fe)SO4 .7H2 O .
The principal ore is sphalerite, ZnS ; other important ore minerals are
smithsonite, ZnCO3 ; hemimorphite, Zn4 Si2 O7
(OH)2 .H2 O ; franklinite, (Zn,Mn,Fe)(Mn,Fe)2 O (sub
4) ; willemite, Zn2 SiO4 ; and zincite, ZnO .
White or yellowish-white; white turns yellow on heating; ZnO; odorless;
absorbs carbon dioxide from the air; used in pigments, ceramic glazes, and
opaque glass and in the manufacture of magnetic ferrites and specialized
ceramics. Zinc oxide is a common constituent in high-grade fluoride opal
glass, in tank-window glass, and in some optical glass. Commonly used in
dry-process, cast-iron enamels. Syn:zincite; zinc bloom; zinc white.
Handbook of Chemistry and Physics, 2
A monoclinic mineral, (Zn,Cu)(CO3 )(OH)2 ; rosasite group;
at Tsumeb, Namibia.
The zinc-silver alloy skimmed from the surface of the bath in the process
of desilverization of lead by zinc. Fay
A monoclinic mineral, Zn3 Si4 O10 (OH)2 .4H
2 O(?) ; smectite group; in Batystau, Kazakhstan.
See:smithsonite; zinc carbonate.
See:gahnite
Orthorhombic ZnSO4 ; used in flotation.
Colorless; needles; ZnSO4 .7H2 O ; odorless; astringent,
metallic taste; effloresces in air; sp gr, 1.9661; melting point, 50
degrees C if heated rapidly; soluble in water and in glycerol; insoluble
in alcohol; and its solutions are acid to litmus. Used in preparing zinc
chemicals. Orthorhombic; molecular weight, 287.54; sp gr, 1.957 (at 25
degrees C, referred to water at 4 degrees C) and ranges from 1.9 to 2.1;
Mohs hardness, 2.0 to 2.5; melting point, 100 degrees C; loses 7H2
O on heating to 280 degrees C; and slightly soluble in alcohol and in
glycerol. Occurs as the mineral goslarite, which is white or yellowish;
formed by the oxidation of sphalerite (ZnS) in damp locations, esp. in the
presence of iron sulfides. CCD, 2; Handbook of Chemistry and Physics, 2
a. Alpha zinc sulfide is the hexagonal mineral wurtzite.
See also:alpha zinc sulfide; wurtzite.
b. Beta zinc sulfide is the isometric mineral sphalerite.
See also:beta zinc sulfide
Colorless, white, or yellowish; crystalline; ZnSO4 .H2 O ;
molecular weight, 115.45; sp gr, 3.98; melting point, 1,049 degrees C;
insoluble in water; and soluble in acids. Used as a pigment and in white
glass and in opaque glass. Handbook of Chemistry and Physics, 2; CCD, 2
See:goslarite
Used as a pigment. It is the whitest of all pigments; permanent, not
poisonous, but lacks the opacity and covering power of white lead or
titanium dioxide. See also:zinc oxide
A greenish-yellow pigment. See also:zinc chromate
Webster 3rd
A mineral found in small, blue crystals; probably a mixture of sulfate of
zinc and carbonate of copper. Fay
A hexagonal mineral, Pb9 Sb22 S42 ; in steel-gray
crystals or exceptionally thin folia in fibrous masses. Also spelled
zinckenite. Syn:keeleyite
See:zincite
Orthorhombic ZnSO4 .