by Greg Klein | April 5, 2017
In another article warning of foreign dependency, the U.S. Geological Survey uses smartphones as a cautionary example. Looking back 30 years ago, “‘portable’ phones were the size of a shoebox and consisted of 25 to 30 elements,” pointed out Larry Meinert of the USGS. “Today they fit in your pocket or on your wrist and are made from about 75 different elements, almost three-quarters of the periodic table.”
The increasing sophistication of portable communications results from a “symphony of electronics and chemistry” that includes, for example, “household names like silicon, which is used for circuit boards, or graphite used in batteries. Then there are lesser known substances like bastnasite, monazite and xenotime. These brownish minerals contain neodymium, one of the rare earth elements used in the magnets that allow smartphone speakers to play music and the vibration motor that notifies you of new, funny cat videos on social media,” the USGS stated.
Almost as varied are the sources. “For instance, the industrial sand used to make the quartz in smartphone screens may come from the United States or China, but the potassium added to enhance screen strength could come from Canada, Russia or Belarus. Australia, Chile and Argentina often produce the lithium used in battery cathodes, while the hard-to-come-by tantalum—used in smartphone circuitry—mostly comes from Congo, Rwanda and Brazil.”
Rwanda and the Democratic Republic of Congo are also sources of conflict minerals.
“With minerals being sourced from all over the world, the possibility of supply disruption is more critical than ever,” Meinert emphasized.
The April 4 article follows a previous USGS report on an early warning system used by the U.S. Defense Logistics Agency to monitor supply threats. In January the USGS released a list of 20 minerals for which the country relies entirely on imports. Whether or not by design, the recent awareness campaign coincides with a bill before U.S. Congress calling on government to support the development of domestic deposits and supply chains for critical minerals.
See an illustrated USGS report: A World of Minerals in Your Mobile Device.