A System of Instruction in the Practical Use of the Blowpipe Part 42

(4) in forceps. V. Frequently colors the flame slightly red.

(5) in borax. Gives the manganese and iron reactions.

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

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

(8) Special reactions. In warm acid dissolves with much effervescence.

Mineral. Triplite

Formula. ([..Mn][.Fe])^{4}[.....P].

Behavior

(1) in gla.s.s-bulb. Generally gives off more or less water.

(2) in open tube. --

(3) on charcoal. --

(4) in forceps. I. Colors the outer blowpipe flame green ([.....P]).

(5) in borax. Gives the manganese and iron reactions.

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

(7) with carb. soda. Forms an infusible ma.s.s.

(8) Special reactions. --

NICKEL AND COBALT.

Mineral. Millerite

Formula. NiS.

Behavior

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

(2) in open tube. Evolves SO^{2}.

(3) on charcoal. Fuses with much ebullition to a magnetic bead.

(4) in forceps. --

(5) in borax. The roasted mineral gives a nickel reaction, slightly modified by small quant.i.ties of iron and copper.

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

(7) with carb. soda. Fuses to a slaggy ma.s.s, which on silver gives the sulphur reaction.

(8) Special reactions. --

Mineral. Coppernickel

Formula. Ni^{2}As.

Behavior

(1) in gla.s.s-bulb. Gives off a little AsO^{3}.

(2) in open tube. Gives off much AsO^{3} and some SO^{2} and falls to powder.

(3) on charcoal. Fuses to a magnetic bead, with the evolution of a.r.s.enic, which colors the flame blue.

(4) in forceps. --

(5) in borax. The a.r.s.enical bead obtained by fusing the mineral on charcoal, if fused upon the same support with borax successively added and removed, gives firstly an iron reaction, then cobalt if present, and lastly nickel.

(6) in mic. salt. If the residual bead which has been treated with borax be further treated with microcosmic salt, the nickel reaction will be obtained and sometimes a slight copper reaction.

(7) with carb. soda. --

(8) Special reactions. Affords a sublimate of metallic a.r.s.enic when treated with cyanide of pota.s.sium.

Mineral. Smaltine

Formula. CoAs.

Behavior

(1) in gla.s.s-bulb. When strongly heated generally evolves metallic a.r.s.enic.

(2) in open tube. Gives a crystalline sublimate of AsO^{3}. Also some SO^{2}.