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Meanings of potash alum in English

Portuguese
pedra-ume

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

        pedra-ume
        Usage of potash alum in English
        1
        The presence of sulphuric acid in potash alum was known to the alchemists.
        The Project Gutenberg Encyclopedia, Volume 1 of 28
        2
        Potash alum is the common alum of commerce, although both soda alum and ammonium alum are manufactured.
        The Project Gutenberg Encyclopedia, Volume 1 of 28
        3
        Potash alum is obtained tolerably pure in commerce in colorless transparent crystalline masses, having an acid, sweetish, astringent taste.
        Scientific American Supplement, No. 401, September 8, 1883
        4
        Potash alum, K2SO4.Al2(SO4)3.24H2O, crystallizes in regular
        The Project Gutenberg Encyclopedia, Volume 1 of 28
        Translations for potash alum