(6) in mic. salt.  As in borax.

  (7) with carb. soda. —­

  (8) Special reactions. —­

* * * * *

Mineral.  Uranite

Formula.                 ([.Ca] +[...U=]^{2})[.....]P + 8[.H].

Behavior

  (1) in glass-bulb.  Evolves water and becomes yellow and opaque.

  (2) in open tube. —­

  (3) on charcoal.  Fuses with intumescence to a black bead having a
                         semi-crystalline surface.

  (4) in forceps. —­

  (5) in borax.  Gives the uranium reaction.

  (6) in mic. salt.  As in borax.

  (7) with carb. soda.  Forms an infusible yellow slag.

  (8) Special reactions.  Gives the PO^{5} reaction.

* * * * *

Mineral.  Chalcolite

Formula.                 ([.Cu]+[...U=]^{2})[.....P] + 8[.H].

Behavior

  (1) in glass-bulb.  As uranite.

  (2) in open tube. —­

  (3) on charcoal.  As uranite.

  (4) in forceps.  As uranite.

  (5) in borax.  In the oxidizing flame gives a green bead, which
                         in the reducing flame becomes of an opaque red,
                         from Cu.

(6) in mic. salt.  As in borax.

(7) with carb. soda.  In reducing flame yields a metallic bead of Cu.

(8) Special reactions.  As uranite.

* * * * *

IRON.

* * * * *

Mineral.  Iron pyrites

Formula.  FeS^{2}.

Behavior

(1) in glass-bulb.  Gives a considerable yellow sublimate of
sulphur, and sometimes sulphide of arsenic.  Also
HS.

  (2) in open tube.  Sulphurous acid and sometimes arsenious acid are
                         evolved.

  (3) on charcoal.  Gives off some sulphur, which burns with a blue
                         flame.  Residue fuses to a magnetic bead.

  (4) in forceps. —­

  (5) in borax.  The roasted mineral gives a strong iron
                         reaction.

  (6) in mic. salt.  As in borax.

  (7) with carb. soda.  Fuses to a black mass, which spreads out on
                         charcoal and gives the sulphur reaction on
                         silver.

  (8) Special reactions. —­

* * * * *

Mineral.  Magnetic pyrites

Formula.
                         [,Fe]^{5}[,,,Fe=]. 
Behavior

  (1) in glass-bulb. —­

  (2) in open tube.  Evolves sulphurous acid.