A white mineral form of arsenic trioxide that occurs naturally, sometimes called arsenolite or claudetite in geological contexts.
From 'arsenic' combined with the Greek 'lithos' (stone), plus '-ite' (suffix for minerals). This technical mineralogical term emerged in 19th-century geology.
Arsenolite represents one of nature's cruel ironies—it's a beautiful crystalline mineral, but arsenic trioxide is also what was used as poison in countless historical murders, making it simultaneously precious and perilous.
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