mirabilite

[ mi-rab-uh-lahyt ]
/ mɪˈræb əˌlaɪt /

noun Mineralogy.

a decahydrate form of sodium sulfate, Na2SO4⋅10H2O.
Compare Glauber's salt.

Origin of mirabilite

1850–55; < Latin ( sal) mīrābil(is) wonderful (salt) + -ite1