KeywordsArizona Geological Survey Bulletins
United States of America
MetadataShow full item record
PublisherUniversity of Arizona Bureau of Mines
DescriptionSELECT BLOWPIPE AND ACID TESTS FOR MINERALS ALUMINUM, Al. 1. Infusible aluminum minerals (also zinc silicates) ignited before and after adding cobalt nitrate solution give an intense blue color. Fusible minerals may give blue cobalt glass whether aluminum is present or not. 2. Ammonia gives a white gelatinous precipitate in solutions containing aluminum. Iron hydroxide, chromium hydroxide, calcium phosphate, calcium borate, and calcium fluorid are also precipitated by ammonia along with aluminum hydroxide. 5 p.
Series/Report no.Bulletin No. 71
Mineral Technology Series No. 19