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USGS Minerals Information: Thallium

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Description: Statistics and information on the worldwide supply, demand, and flow of the element (PDF format).
USGS Minerals Information: Thallium Thallium, a soft, bluish-gray, malleable heavy metal, was discovered by Sir William Crookes in 1861 while he was making spectroscopic determinations for tellurium on residues from a sulfuric acid plant.  Although the metal is reasonably abundant in the Earth's crust at a concentration estimated to be about 0.7 part per million, it exists mostly in association with potassium minerals in clays, soils, and granites and, thus, is not generally considered to be commercially recoverable from those forms.  The major source of commercial thallium is the trace amounts found in copper, lead, zinc, and other sulfide ores.  Several thallium minerals, containing 16% to 60% thallium, occur in nature as sulfide or selenide complexes with antimony, arsenic, copper, lead, and silver but are rare and have no commercial importance as sources of this element.  Thallium also is recovered as a byproduct from the flue dust and residues generated during the roasting and smelting steps in the processing of these ores.
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Page title:USGS Minerals Information: Thallium
Keywords:thallium statistics
Description:Statistics and information on the worldwide supply, demand, and flow of thallium
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