Investigation of the NH3-H2O phase-diagram in the range 100MPa-1.5GPa using in-situ Raman-spectroscopy - application to Titans dynamics

Research areas:

• Environnement, Paléo-Environnement et Bio-Indicateurs (2011 - 2016)

Year:

1995

Authors:

• Olivier Grasset
• S BEAUCHESNE
• Christophe Sotin

Journal:

COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE II

Volume:

320

Number:

4, 2

Pages:

249-256

Month:

FEB 16

ISSN:

1251-8069

BibTex:

@article{WOS:A1995QJ58900001, author = "Olivier Grasset and S BEAUCHESNE and Christophe Sotin", abstract = "Experiments in a sapphire anvil cell have been carried out to study the behaviour of water (85\%)-ammonia (15\%) solutions at high pressure and low temperature in order to understand the thermal evolution of Titan. In situ Raman spectroscopy allows us to characterize the ice phases in the pressure range 100 MPa-1.5 GPa and in the temperature range 130-300 K. The present study describes several cases exhibiting ice phases different from those expected according to the phase diagram of water ice. A liquidus of the H2O (85\%)-NH3 (15\%) solution is presented.", extra = "PICL", issn = "1251-8069", journal = "COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE II", month = "FEB 16", number = "4, 2", pages = "249-256", title = "{I}nvestigation of the {NH}3-{H}2{O} phase-diagram in the range 100{MP}a-1.5{GP}a using in-situ {R}aman-spectroscopy - application to {T}itans dynamics", volume = "320", year = "1995", }

Abstract:

Experiments in a sapphire anvil cell have been carried out to study the
behaviour of water (85\%)-ammonia (15\%) solutions at high pressure and
low temperature in order to understand the thermal evolution of Titan.
In situ Raman spectroscopy allows us to characterize the ice phases in
the pressure range 100 MPa-1.5 GPa and in the temperature range 130-300
K. The present study describes several cases exhibiting ice phases
different from those expected according to the phase diagram of water
ice. A liquidus of the H2O (85\%)-NH3 (15\%) solution is presented.