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PDF(7) with carb. soda. —
(8) Special reactions. —
* * * * *
Mineral. Franklinite
Formula. ([.Fe][.Zn][.Mn]) ([...Fe=][...Mn=]).
Behavior
(1) in glass-bulb. —
(2) in open tube. —
(3) on charcoal. Forms a white
incrustation on the charcoal,
which
moistened with cobalt solution assumes a
green
color.
(4) in forceps. V. In the
blue flame fuses on edges and and
becomes
magnetic.
(5) in borax. Gives the iron and manganese reaction.
(6) in mic. salt. As in borax.
(7) with carb. soda. Affords a
considerable white incrustation of
ZnO.
(8) Special reactions. Gives a strong
manganese reaction with nitre and
carbonate
of soda.
* * * * *
Mineral. Ilmenite
Formula. [...Ti=] and [...Fe=].
Behavior
(1) in glass-bulb. —
(2) in open tube. —
(3) on charcoal. —
(4) in forceps. V. In reducing
flame fuses on edges and becomes
magnetic.
(5) in borax. Gives the iron reaction.
(6) in mic. salt. In oxidizing
flame exhibits the iron reaction.
In
reducing flame assumes a deep brownish red
color.
(7) with carb. soda. —
(8) Special reactions. —
* * * * *
Mineral. Chromic iron
Formula. [.Fe][...Cr=].
Behavior
(1) in glass-bulb. —
(2) in open tube. —
(3) on charcoal. —
(4) in forceps. As the preceding.
(5) in borax. Dissolves
slowly and gives the chromium
reaction.
(6) in mic. salt. As in borax.
(7) with carb. soda. On platinum
foil with nitre and carbonate of
soda
affords a yellow mass of chromate of
potassa.
(8) Special reactions. —
* * * * *
Mineral. Lievrite
Formula. 3([.Fe][.Ca])^{3}[...Si] + 2[...Fe=][...Si].
Behavior
(1) in glass-bulb. Occasionally
gives off some water and turns
black.
(2) in open tube. —
(3) on charcoal. Fuses to a
black globule, which in the reducing
flame
becomes magnetic.
