Matt Framer, a graduate student at Baylor University, working at ORNL under the direction of Lynn Boatner of the Solid State Division, is studying alkali lanthanide double phosphates for radiation detection applications. Current research has focused on K3Lu(PO4)2 and previous characterization with single crystal x-ray diffraction and neutron powder diffraction has provided evidence of low temperature phase transitions. With the High Flux Isotope Reactor currently down for upgrades low temperature capabilities for studying structural information of powders is limited, however, the HTML beamline at the National Synchrotron Light Source offers such capabilities. Data were collected at 293, 230, 200, 100 and 30 K and the low temperature polymorphs have been confirmed. Rietveld refinements are being used to understand these low temperature structures. A poster titled “Polymorphism, Phase Transitions, and Thermal Expansion of K3Lu(PO4)2” by J. Matt Farmer, Lynn Boatner, Bryan Chakoumakos, Claudia Rawn, and Jeff C. Bryan received both the Pauling Poster Prize and the 2001 Oxford Poster Prize at the Annual Meeting of the American Crystallographic Association in Los Angeles in July 2001.  This is especially significant in that it is the first time that both awards have been given for the same poster.