title: High Pressure Polymorphism in Cesium.
abstract: A new polymorph of cesium, existing over the narrow pressure range from about 42.2 to 42.7 kilobars at room temperature, has been discovered. Its crystal structure is face-centered-cubic with a = 5.800 +/- 0.007 A at 42.5 kb and 27 degrees C. Cesium-II, which exists over the pressure range 23.7 to 42.2 kb, is also face-centered-cubic with a = 5.984 +/- 0.011 A at 41 kb and 27 degrees C. An improved resistance-pressure curve and x-ray compressibility measurements for Cs are also given.
authors.forename: H T
authors.initials: HT
authors.lastname: Hall
authors.forename: L
authors.initials: L
authors.lastname: Merrill
authors.forename: J D
authors.initials: JD
authors.lastname: Barnett