INVESTIGATION OF THE NH3-H2O PHASE-DIAGRAM IN THE RANGE 100MPA-1.5GPAUSING IN-SITU RAMAN-SPECTROSCOPY - APPLICATION TO TITANS DYNAMICS

Authors
GRASSET O BEAUCHESNE S SOTIN C
Citation
O. Grasset et al., INVESTIGATION OF THE NH3-H2O PHASE-DIAGRAM IN THE RANGE 100MPA-1.5GPAUSING IN-SITU RAMAN-SPECTROSCOPY - APPLICATION TO TITANS DYNAMICS, Comptes rendus de l'Academie des sciences. Serie II. Mecanique, physique, chimie, astronomie, 320(4), 1995, pp. 249-256
Citations number
19
Categorie Soggetti
Multidisciplinary Sciences
Journal title
Comptes rendus de l'Academie des sciences. Serie II. Mecanique, physique, chimie, astronomie → ACNP
ISSN journal
12518069
Volume
320
Issue
4
Year of publication
1995
Part
2
Pages
249 - 256
Database
ISI
SICI code
1251-8069(1995)320:4<249:IOTNPI>2.0.ZU;2-S
Abstract
Experiments in a sapphire anvil cell have been carried out to study th e behaviour of water (85%)-ammonia (15%) solutions at high pressure an d low temperature in order to understand the thermal evolution of Tita n. 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 13 0-300 K. The present study describes several cases exhibiting ice phas es different from those expected according to the phase diagram of wat er ice. A liquidus of the H2O (85%)-NH3 (15%) solution is presented.