Small Piezoelectric Quartz Crystals (2 of 2) (image) National Institute of Standards and Technology (NIST) Share Print E-Mail Caption Small piezoelectric quartz crystals are the key to micro thermogavimetric analysis. Here, the crystals, with samples on top, are baked under controlled conditions. Mass changes are detected by changes in the crystal frequency. Credit Kar/National Institute of Standards and Technology Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.