Premium
Vibrational spectroscopy at high pressures. Part 50 . A Raman scattering study of MSCN (M = K, Rb, Cs, NH 4 ) at high pressures
Author(s) -
Adams David M.,
Pogson Mark
Publication year - 1988
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250190505
Subject(s) - isostructural , orthorhombic crystal system , raman spectroscopy , monoclinic crystal system , chemistry , phase transition , phase (matter) , raman scattering , spectroscopy , crystallography , analytical chemistry (journal) , crystal structure , thermodynamics , optics , organic chemistry , physics , quantum mechanics
The phase behaviour of the title compounds was studied at high pressures using Raman spectroscopy. The isostructural materials KSCN and RbSCN show two phase changes (12.5 and 45.5 kbar; 10.5 and 37.5 kbar, respectively) which appear to be second order in type. Structures and transition mechanisms are proposed for each phase. CsSCN has a different orthorhombic structure and shows only one phase change in the range studied, at 23.5 ± 1.5 kbar, which also seems to be second order. The known phase transition in NH 4 SCN at 2 kbar has been confirmed, and a new one found at 10 kbar. A monoclinic cell is proposed for the new phase.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom