Nomenclature
CAS number: 1314-98-3
Zinc Blende.
SZn; mol wt 97.47.
S 32.90%, Zn 67.11%.
ZnS.
Properties
Occurs in nature as the minerals wurtzite (hexagonal, d 4.087) and sphalerite (cubic, d 4.102). White to grayish-white or yellowish powder. When contg water,
it slowly oxidizes in air to sulfate. Insol in water, alkalies.
Sol in dil mineral acids. Precipitated zinc sulfide of commerce usually
contains 15-20% water of hydration. The dried precipitate may have
been heated to 725° in the absence of air to obtain substantial conversion
to wurtzite, the form preferred by the pigment industry.Use
Pigment for paints, oilcloths, linoleum, leather,
dental rubber, etc., especially in the form of lithopone; mixed with
ZnO as “mineral white.” Anhydr zinc sulfide is used in x-ray screens
and with a trace of a radium or mesothorium salt in luminous dials
of watches; also television screens.