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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Alunogen
is always a great word to know.
So is bezoar. Does it mean:
| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
| a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes. |
Encyclopedia Britannica
Encyclopedia
alunogen
a sulfate mineral formed by sulfate solutions that attack aluminous minerals; alunogen is hydrated aluminum sulfate, formulated Al2(SO4)317H2O. It typically occurs as an efflorescence or crevice filling in pyrite-containing coal formations, shales, or slates, as well as in the gossan (weathered capping) of sulfide ore deposits and in volcanic fumarole deposits. In older literature, alunogen and other hairlike sulfate minerals were called Haarsalz ("hair salts"). For detailed physical properties, see sulfate mineral (table)
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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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