2. When were zeolites discovered?
In 1756, the Swedish mineralogist Axel
Fredrick Cronstedt discovered that stilbite, a natural mineral,
visibly lost water when heated, and he named the class of
materials zeolites from the classical Greek words meaning
'boiling stones.' Zeolites were considered an obscure group
of minerals with unique properties for almost 200 years, and
Cronstedt was remembered primarily for discovering the element
nickel.
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