Structure of ND3 solids I and II at high pressure by neutron diffraction
1984; American Institute of Physics; Volume: 81; Issue: 12 Linguagem: Inglês
10.1063/1.447605
ISSN1520-9032
AutoresJuergen Eckert, R. L. Mills, Sushil K. Satija,
Tópico(s)High-pressure geophysics and materials
ResumoA preliminary investigation of two solid phases of deuterated ammonia has been performed by single-crystal neutron diffraction. At 5.1 kbar and 240 K, the newly discovered solid II was found to consist of orientationally disordered molecules in a hexagonal close-packed lattice with space ground P63/mmc and lattice constants a=3.588(2) Å and c=5.870(2) Å. The primitive cubic structure (space group P213) of solid I was confirmed up to a pressure of 5.1 kbar at 215 K, where the lattice constant is 5.035(2) Å.
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