Unplugged ceremony pdf sign1/7/2024 ![]() ![]() The Ute constructed unique ceremonial rattles made from buffalo rawhide which they filled with clear quartz crystals collected from the mountains of Colorado and Utah. The Uncompahgre Ute indigenous people from Central Colorado are one of the first documented groups of people in the world credited with the application of mechanoluminescence involving the use of quartz crystals to generate light. ![]() Quartz rattlers of the Uncompahgre Ute indigenous people Flashes of light are visible when the quartz crystals are subjected to mechanical stress in darkness. History An Uncompahgre Ute Buffalo rawhide ceremonial rattle filled with quartz crystals. ![]() These are examples of mechanoluminescence, which is luminescence resulting from any mechanical action on a solid. Triboluminescence differs from piezoluminescence in that a piezoluminescent material emits light when deformed, as opposed to broken. Triboluminescence is often a synonym for fractoluminescence (a term sometimes used when referring only to light emitted from fractured crystals). Triboluminescence can be observed when breaking sugar crystals and peeling adhesive tapes. The term comes from the Greek τρίβειν ("to rub" see tribology) and the Latin lumen (light). The phenomenon is not fully understood but appears to be caused by the separation and reunification of static electric charges, see also triboelectric effect. Triboluminescence is a phenomenon in which light is generated when a material is mechanically pulled apart, ripped, scratched, crushed, or rubbed (see tribology). Mechanical generation of light Triboluminescence of nicotine L-salicylate ![]()
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