• Hydrothermal equilibria in Nd2O3−H2O−CO2 system

• # Fulltext

https://www.ias.ac.in/article/fulltext/jcsc/087/04/0069-0074

• # Keywords

Hydrothermal equilibria; rare earth carbonates

• # Abstract

Isobaric equilibria in Nd2O3−H2O−CO2 system have been determined at 1500 atmospheres and temperature range of 200–900°C. The mole fraction of CO2 and H2O in the fluid phase were varied from 0·0 to 1·0. The stable phases are Nd(OH)2-hexagonal, Nd(OH)CO2-hexagonal, Nd2O2CO2-hexagonal and NdOOH-monoclinic. Nd(OH)2 is stable only when$$X_{CO_2 }$$ is less than 0·008. The stability field of Nd(OH)2 extends parallel to temperature axis. Thus, Nd(OH)3 coexists with all the other phases. When$$X_{CO_2 } = 1 \cdot 0$$, the only stable phase is Nd2O2CO3-hexagonal.

• # Author Affiliations

1. Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore - 560 012
2. Mineralogical Institute, Manasa Gangotri, Mysore - 570 006

• # Journal of Chemical Sciences

Volume 134, 2022
All articles
Continuous Article Publishing mode

• # Editorial Note on Continuous Article Publication

Posted on July 25, 2019