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2. World Resources:
• Cesium is associated with lithium-bearing pegmatites
worldwide, and cesium resources have been identified in
Australia, Canada, Namibia, the United States, and Zimbabwe.
• In the United States, pollucite occurs in pegmatites in Alaska,
Maine, and South Dakota.
• Lower concentrations occur in brines in Chile and China and in
geothermal systems in Germany, India, and Tibet.
• China was thought to have cesium-rich deposits of geyserite,
lepidolite, and pollucite, with concentrations highest in Yichun,
Jiangxi Province, although no resource, reserve, or production
estimates were available.
13. The cesium clock is the most
accurate type of clock yet
developed. This device makes
use of transitions between
the spin states of the cesium
nucleus and produces a
frequency which is so regular
that it has been adopted for
establishing the time…