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Mineral. Soda-nitre
Formula. [.Na][.....N].
Behavior
(1) in glass-bulb. Fuses and
if strongly heated evolves nitrous
fumes.
(2) in open tube.
—
(3) on charcoal.
Deflagrates
and is absorbed into the charcoal.
(4) in forceps. Deflagrates
on platinum wire, coloring the flame
yellow.
(5) in borax. —
(6) in mic. salt. —
(7) with carb. soda. —
(8) Special reactions. In a glass-bulb
with bisulphate of potassa,
gives
the NO^{5}-reaction.
* * * * *
Mineral. Glauber-salt
Formula. [.Na][...S] + 10[.H].
Behavior
(1) in glass-bulb. Fuses and
gives off water having a neutral
reaction.
(2) in open tube. —
(3) on charcoal. Fuses, and
is absorbed by the charcoal. The
saturated
charcoal laid upon silver gives the
sulphur
reaction
(4) in forceps. Fuses and colors the flame yellow.
(5) in borax. —
(6) in mic. salt. —
(7) with carb. soda. —
(8) Special reactions. Gives the SO^{3}-reaction.
* * * * *
Mineral. Glauberite
Formula. [.Na][...S] + [.Ca][...S].
Behavior
(1) in glass-bulb. Decrepitates
with the evolution of more or less
water,
and when strongly heated fuses to a clear
liquid.
(2) in open tube. —
(3) on charcoal. Fuses to a
clear bead, then spreads out; the
soda
is absorbed and the lime left on the
surface.
Laid on silver, the fused mass gives a
sulphur
reaction.
(4) in forceps. Fuses easily
to a clear glass, coloring the
flame
yellow.
(5) in borax. Fuses easily and gives the lime reaction.
(6) in mic. salt. As in borax.
(7) with carb. soda. As alone in charcoal.
(8) Special reactions. As in preceding.
* * * * *
Mineral. Borax
Formula. [.Na][...B]^{2}+10[.H].
Behavior
(1) in glass-bulb. Intumesces
with the evolution of water, and
under
a strong heat fuses.
