Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. a water-soluble mineral, ammonium aluminium sulphate (NH4)Al(SO4)2·12(H2O) found in fumaroles and similar environments

from The Century Dictionary and Cyclopedia

  • n. Same as ammonialum.

Etymologies

Sorry, no etymologies found.

Examples

  • The ground surface contains efflorescent salts such as alum, a hydrated potassium sulfate, tschermigite, a hydrated ammonium sulfate, gypsum and clays such as illite and montmorillonite.

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