INFRARED AND RAMAN STUDIES ON VARIOUS PHASES OF ICE UNDER PRESSURES UP TO 53 GPa

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Submitted on 1 Jan 1987

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INFRARED AND RAMAN STUDIES ON VARIOUS PHASES OF ICE UNDER PRESSURES UP TO 53

GPa

W. Holzapfel, P. Johannsen, M. Krobok

To cite this version:

W. Holzapfel, P. Johannsen, M. Krobok. INFRARED AND RAMAN STUDIES ON VARIOUS

PHASES OF ICE UNDER PRESSURES UP TO 53 GPa. Journal de Physique Colloques, 1987, 48

(C1), pp.C1-639-C1-639. �10.1051/jphyscol:1987188�. �jpa-00226454�

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JOURNAL DE PHYSIQUE

C o l l o q u e C1, s u p p l k m e n t a u n o

3,

Tome 4 8 ,

m a r s

1 9 8 7

INFRARED AND RAMAN STUDIES ON VARIOUS PHASES OF ICE UNDER PRESSURES UP TO 53 GPa

W.B. HOLZAPFEL, P.G. JOHANNSEN a n d M. KROBOK

Universitdt-EH-Paderborn, Fachbereich 6 , 0-4790 Paderborn,

F.R.G.

Abstract : Infrared absorption spectra a r e resented f o r

ice

VII and VIII f o r t h e

spectral

range between 80

and

10 000

mf:

The changes i n t h e s p e c t r a l f e a t u r e s a r e canpared with e a r l i e r r e s u l t s from Raman m a s u r e m n t s

on ice

VII, V I I I

and

X

up to 53

@a (Hirsch

and

Holzapfel, 1986). E f f e c t s o f pressure m t h e phase bcundaries and m t h e hydrogen bcnding

w i l l

be discussed.

COMMENTS D.D. KLUG

Can you estimate the pressure distribution in your diamond anvil at your highest pressures?

Answer

:

It is very difficult to give an accurate estimate of the pressure distribution at the highest presures. By the use of different anvil shapes one finds typically a difference up to 10 1. However in addition, one has to consider that the Raman spectra and phase transition kinetics are strongly affected by the completely unknown deviatoric stresses or in other words the distribution of uniaxial stresses.

Article published online by EDP Sciences and available at http://dx.doi.org/10.1051/jphyscol:1987188