The following table gives the speed of sound in selected solids. Most types of glass and ceramic have a speed of sound of about 5000 meters per second. In air it is about 340 m/sec which is 767 mph.
Diamond 12000 Pyrex glass 5640 Iron 5130 Aluminum 5100 Brass 4700 Copper 3560 Gold 3240 Lucite 2680 Lead 1322 In Fresno, however they found a local crystal in which sound can apparently zip around much faster. A factor of over 4 times faster thanks to “phasons”. https://www.ornl.gov/content/supersonic-propagation-lattice-energy-phasons-fresnoite The crystal is named “fresnoite” which is probably the best thing to come out of Fresno since Slim Pickens. “A good place to be from” as they say, with the emphasis on from. There are implications to phasons which are not mentioned… possibly even implications for LENR…
