Part 45 (1/2)

(4) in forceps. --

(5) in borax. The roasted mineral gives a zinc reaction, and sometimes a slight iron reaction.

(6) in mic. salt. As in borax.

(7) with carb. soda. As alone on charcoal. Moreover colors the flame blue. The fused alkali gives a S reaction on silver.

(8) Special reactions. --

Mineral. Red oxide of zinc

Formula. [.Zn].

Behavior

(1) in gla.s.s-bulb. --

(2) in open tube. --

(3) on charcoal. In the reducing flame forms a thin incrustation of oxide of zinc on the charcoal.

(4) in forceps. V.

(5) in borax. Generally gives a manganese and slight iron reaction in addition to that of zinc.

(6) in mic. salt. As in borax.

(7) with carb. soda. On charcoal, forms a thick incrustation of ZnO.

(8) Special reactions. With carbonate of soda and nitre on platinum foil gives manganese reaction.

Mineral. Electric calamine

Formula. 2[.Zn]^{3}[...Si] + 3[.H]

Behavior

(1) in gla.s.s-bulb. Gives off water and becomes white and opaque.

(2) in open tube. --

(3) on charcoal. --

(4) in forceps. V.