ineral. White antimony

Formula. SbO^{3}.

Behavior

(1) in glass-bulb. Is sublimed and recondensed in the neck of
the tube.

(2) in open tube. As in the glass-bulb.

(3) on charcoal. Fuses with the evolution of dense white
fumes, which incrust the surface of the
charcoal. In the reducing flame is partly
reduced, yielding metallic antimony. Colors
flame blue.

(4) in forceps. Fuses and is volatilized, coloring the outer
flame blue.

(5) in borax. Gives the antimony reaction.

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

(7) with carb. soda. In the reducing flame is reduced, yielding
metallic antimony.

(8) Special reactions. As native antimony.

* * * * *

ARSENIC.

* * * * *

Mineral. Native arsenic

Formula. As.

Behavior

(1) in glass-bulb. Sublimes without fusion and recondenses as a
dark grey metallic sublimate, sometimes
leaving a small residue.

(2) in open tube. If gently heated in a good current of air
passes off as AsO^{3}, which is partly
condensed as a white sublimate in the upper
part of the tube.

(3) on charcoal. Passes off as AsO^{3}, which thinly incrusts
the charcoal beyond the assay.

(4) in forceps. Colors the flame blue.

(5) in borax. --

(6) in mic. salt. --

(7) with carb. soda. --

(8) Special reactions. --

* * * * *

Mineral. Realgar

Formula. AsS^{2}.

Behavior

(1) in glass-bulb. Fuses, enters into ebullition and is
sublimed as a transparent red sublimate.

(2) in open tube. Gently heated passes off as SO^{2} and
AsO^{3}, the latter of which is redeposited
in the upper part of the tube.

(3) on charcoal. Fuses and passes off as arsenious and
sulphurous acids.

(4) in forceps. Fuses and colors the flame b