C24Cs samples containing oriented N-2 molecules

The adsorption of N-2 molecules inside C24Cs has been studied in detail as a function of temperature and pressure using n-diffraction and nuclear reso nance photon scattering (NRPS). Large differences were observed between sam ples derived from highly oriented pyrolytic,graphite and those prepared fro m graphite powder. The tilt angle of the N-2? molecular axis was determined by using NRPS and found to lay nearly parallel to the graphite planes. The amount of adsorbed N-2, increased with decreasing temperatures, reaching s aturation composition C24CS(N-2)(1.5) at approximately 100 K with an initia l N-2, pressure of 2 bar. At higher pressure, 9 bar, two new phases were fo rmed: a second stage C32Cs(N-2)(2.1) and a first stage C16Cs(N-2)(1.8) at T < 170 K and are discussed in detail.