Accurate quantitative data pertinent to the structure of solid materials at the micro size level, which are difficult or prohibitive to obtain by traditional manual measurements, are now obtained directly by a digital computer which uses a...
Tables are presented for the second virial coefficient of a Lennard-Jones (m-6) gas in reduced variables for seven values of m. A wide range of reduced temperatures, in a mesh chosen for ease of interpolation, is covered. Values are given for the...
The demand for time standards, accurate to a thousandth of a second or better for navigation, communication, seismology, geological surveys, and physical science, led to the development of the quartz crystal clock in 1929. As the first truly modern...
aperiodic crystals; new branch of crystallography; quasicrystals
The discretely diffracting aperiodic crystals termed quasicrystals, discovered at NBS in the early 1980s, have led to much interdisciplinary activity involving mainly materials science, physics, mathematics, and crystallography. It led to a new...