Show sample as: 72-frame QuickTime VR or 360-frame QuickTime movie loop.    My periodic table poster is now available! Cesium atomic clock closeup. This is a closeup view of the component tower in the cesium atomic clock on a chip described in the previous sample. Watch the "Spin" video to really get a good view of this thing. Source: NIST Contributor: NIST Acquired: 24 March, 2009 Text Updated: 24 March, 2009 Price: Loan Size: 0.25" Purity: <1%