1. Thermodynamics Research Center (TRC), Physical and Chemical Properties Division, National Institute of Standards and Technology (NIST), Boulder, Colorado 80305-3328
2. Physical Properties Research Facility, Chemical Engineering Department, 327 Dougherty Engineering Building, 1512 Middle Drive, University of Tennessee, Knoxville, Tennessee 37996-2200, and Nuclear Science and Technology Division, Oak Ridge National Laboratory (ORNL), Oak Ridge, Tennessee 37831-6273