(7) with carb. soda. With much of the alkali is decomposed, yielding metallic copper. With small portions successively added first fuses and then intumesces, fuses with a strong flame, and is then absorbed into the charcoal, leaving metallic copper. (8) Special reactions. Gives the phosphoric acid reaction. * * * * * Mineral. Olivenite Formula. [.Cu]^{4}([.....As][.....P]) + [.H]. Behavior (1) in glass-bulb. Gives off water. (2) in open tube. -- (3) on charcoal. Fuses with detonation and the evolution of arsenical fumes to a brittle regulus, brown externally and having a white fracture. (4) in forceps. Fuses and colors the outer flame green. On cooling has a crystalline surface. (5) in borax. Gives the copper reaction. (6) in mic. salt. As in borax. (7) with carb. soda. Is reduced, yielding metallic copper. (8) Special reactions. Gives the arsenic reactions. * * * * * ANTIMONY. * * * * * Mineral. Native antimony Formula. Sb. Behavior (1) in glass-bulb. Fuses and, when strongly heated, volatilizes being redeposited in the tube as a dark grey sublimate. (2) in open tube. Fuses and gives off dense white fumes, which are partly redeposited on the tube. Sometimes also gives off arsenical fumes in small quantity. (3) on charcoal. Fuses and gives off dense white fumes, which thickly incrust the charcoal and color the flame blue immediately beyond the assay. (4) in forceps. -- (5) in borax. The oxide formed upon charcoal gives the antimony reactions. (6) in mic. salt. As in borax. (7) with carb. soda. -- (8) Special reactions. The incrustation on the charcoal, if treated with nitrate of cobalt assumes the characteristic green color. * * * * * Mineral. Grey antimony Formula. SbS^{3}. Behavior (1) in glass-bulb. Fuses readily and occasionally gives off a small quantity of sulphur. Strongly heated forms a brown sublimate of SbS^{3} and SbO^{3}.