Abstract
Solid-state absorption and Raman phonon spectroscopic investigations of PrCl3, PrBr3, and NdBr3 under high pressure have been carried out at room temperature. These studies showed that the UCl3-type hexagonal form of PrCl3 and PrBr3 converts with the application of pressure to the PuBr3-type orthorhombic crystal structure. The absorption and Raman spectra obtained from PrBr3 and NdBr3 at pressures above ∼260 kbar exhibit differences from spectra obtained at lower pressures, where they exhibit the PuBr3-type orthorhombic structure. These spectral differences suggest that a phase transformation might have taken place to an as-yet-unidentified crystal structure.
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References
1.
Vezzoli
G. C.
, Mat. Res. Bull. 5 , 213 (1970 ).
2.
Beck
H. P.
and
Gladrow
E.
, Z. Anorg. Allg. Chem. 453 , 79 (1979 ).
3.
Beck
H. P.
and
Gladrow
E.
, Z. Anorg. Allg. Chem. 502 ,178 (1983 ).
4.
Beck
H. P.
and
Gladrow
E.
, Z. Anorg. Allg. Chem. 498 , 75 (1983 ).
5.
Peterson
J. R.
Young
J. P.
Haire
R. G.
Begun
G. M.
, and
Benedict
U.
, Inorg. Chem. 24 , 2466 (1985 ).
6.
Haire
R. G.
Benedict
U.
Young
J. P.
Peterson
J. R.
, and
Begun
G. M.
, J. Phys. C 18 , 4595 (1985 ).
7.
Haire
R. G.
Young
J. P.
Peterson
J. R.
, and
Benedict
U.
, J. Less-Common Met. 133 , 167 (1987 ).
8.
Wilmarth
W. R.
Begun
G. M.
, and
Peterson
J. R.
, J. Less-Common Met. 148 , 193 (1989 ).
9.
Peterson
J. R.
Young
J. P.
Ensor
D. D.
, and
Haire
R. G.
, Inorg. Chem. 25 , 3779 (1986 ).
10.
Daniel
J. F.
Wilmarth
W. R.
Begun
G. M.
, and
Peterson
J. R.
, J. Crystallogr. and Spectrosc. Res. 19 , 39 (1989 ).
11.
Young
J. P.
Haire
R. G.
Fellows
R. L.
, and
Peterson
J. R.
, J. Radioanal. Chem. 43 , 479 (1978 ).
12.
Merrill
L.
and
Bassett
W. A.
, Rev. Sci. Instrum. 45 , 290 (1974 ).
13.
Peterson
J. R.
Benedict
U.
Young
J. P.
Haire
R. G.
, and
Begun
G. M.
, Microchem. J. 34 , 76 (1986 ).
14.
Mao
H. K.
Bell
P. M.
Shaner
J. W.
, and
Steinberg
D. J.
, J. Appl. Phys. 49 , 3276 (1978 ).
15.
Xu
J. A.
Mao
H. K.
, and
Bell
P. M.
, Science 232 , 1404 (1986 ).