Nickel Ores and Minerals Mineral Processing amp; Metallurgy
To test the presence of nickel in a mineral, by means of the blowpipe, requires great care. If heated on charcoal, together with carbonate of soda in the inner flame, a grey metallic powder, attractable by the magnet, is formed. If heated with borax on platinum wire in the outer frame, a hyacinth red to violet brown glass results when hot, a yellowish or yellowish red when cold. In the ...
