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alunogen

[uh-loo-nuh-juh n] /əˈlu nə dʒən/
noun
1.
a mineral, hydrous sulfate of aluminum, Al 2 (SO 4) 3 ⋅18H 2 O, occurring as a white, fibrous crust on quarry or mine walls.
Origin of alunogen
1865-1870
1865-70; < French alun (see alunite) + -o- + -gen
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Based on the Random House Dictionary, © Random House, Inc. 2015.
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