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Definition of the noun ammonia alum
What does ammonia alum mean as a name of something?
- a white crystalline double sulfate of aluminum: the ammonium double sulfate of aluminum
- lexical domain: Substances - nouns denoting substances
- synonyms of ammonia alum: alum / ammonium alum
- more generic terms: Al / aluminium / aluminum / atomic number 13 = a silvery ductile metallic element found primarily in bauxite; double salt = a solution of two simple salts that forms a single substance on crystallization
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by Robert Dundas Thomson
Ammonia alum is, however, preferred for this purpose, as it is nearly decomposed by the temperature of firing. A saturated solution of 2 nitre, 1 common salt, 1 alum, in a boiling state, is used by workers in gold to produce fine colours on gold.
Beeton's Medical dictionary (1871)
by Samuel Orchart Beeton
Ammonia alum is more valuable than potash alum, from containing 11.90 per cent. of alumina, which is the ...
by Edward Thorpe
ammonia alum (or 383 lbs. aluminium sulphate), ...
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