Lexic.us

Definition of Potash alum

1. Noun. A white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum.

Definition of Potash alum

1. Noun. alum, hydrated potassium aluminium sulphate, formula K₂SO₄.Al₂(SO₄)₃.24H₂O ¹

¹ Source: wiktionary.com

Lexicographical Neighbors of Potash Alum

Literary usage of Potash alum

Below you will find example usage of this term as found in modern and/or classical literature:

1. The Encyclopaedia Britannica: A Dictionary of Arts, Sciences and General (1890)
"potash alum (in which the alkali is potash) is the common ... The composition of the ordinary potash alum is represented by the formula A1K(SO,),- 12H,0. ..."

2. A Dictionary of Arts, Manufactures, and Mines by Andrew Ure (1858)
"At a gentle heat both lose their water of crystallization, amounting to 45J per cent, for the potash alum, and 48 for the ammoniacal. ..."

3. The Encyclopaedia Britannica: A Dictionary of Arts, Sciences and General (1890)
"The species first investigated was potash alum. That it contained sulphuric acid as a constituent was known even to the alchemists. ..."

4. Report of the Secretary of Agriculture by United States Dept. of Agriculture (1889)
"potash alum may be made directly from some minerals, such as the "alum stone" mined ... Ammonia alum, however, as well as most potash alum, is made by the ..."

5. The Encyclopedia Americana: A Library of Universal Knowledge (1918)
"The alum of commerce is assumed to be potash alum, the formula of which has ... Sodium alum is probably not substituted for potash alum to any great extent. ..."

6. The American Cyclopaedia: A Popular Dictionary of General Knowledge by Charles Anderson Dana (1873)
"At first only potash alum was manufactured, but since the introduction of ammonia as a refuse product in the production of illuminating gas large quantities ..."

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