DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Structure and Liquid Fragility in Sodium Carbonate

Journal Article · · Journal of Physical Chemistry. A, Molecules, Spectroscopy, Kinetics, Environment, and General Theory
ORCiD logo [1]; ORCiD logo [2];  [3];  [4];  [5];  [5];  [6];  [7]
  1. Univ. of Oxford (United Kingdom). Dept. of Chemistry. Physical and Theoretical Chemistry Lab.
  2. Univ. of São Paulo (Brazil). Lab. of Molecular Spectroscopy. Inst. of Chemistry
  3. Univ. College London (United Kingdom). Dept. of Chemistry
  4. Argonne National Lab. (ANL), Argonne, IL (United States). X-ray Science Division
  5. Argonne National Lab. (ANL), Argonne, IL (United States). X-ray Science Division; Materials Development Inc., Arlington Heights, IL (United States)
  6. Materials Development Inc., Arlington Heights, IL (United States)
  7. Stony Brook Univ., NY (United States)

In this paper, the relationship between local structure and dynamics is explored for molten sodium carbonate. A flexible fluctuating-charge model, which allows for changes in the shape and charge distribution of the carbonate molecular anion, is developed. The system shows the evolution of highly temperature-dependent complex low-dimensional structures which control the dynamics (and hence the liquid fragility). By varying the molecular anion charge distribution, the key interactions responsible for the formation of these structures can be identified and rationalized. Finally, an increase in the mean charge separation within the carbonate ions increases the connectivity of the emerging structures and leads to an increase in the system fragility.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States); Materials Development Inc., Arlington Heights, IL (United States); Univ. of Oxford (United Kingdom)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Engineering and Physical Sciences Research Council (EPSRC)
Grant/Contract Number:
AC02-06CH11357; SC0015241; EP/L015722/1
OSTI ID:
1461315
Journal Information:
Journal of Physical Chemistry. A, Molecules, Spectroscopy, Kinetics, Environment, and General Theory, Vol. 122, Issue 4; ISSN 1089-5639
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

References (40)

Locally favoured structures and dynamic length scales in a simple glass-former journal February 2017
Lifetimes and lengthscales of structural motifs in a model glassformer journal January 2013
Favoured local structures in liquids and solids: a 3D lattice model journal January 2015
Understanding water’s anomalies with locally favoured structures journal April 2014
Kinetic structure of a two-dimensional liquid journal August 1995
Stringlike Cooperative Motion in a Supercooled Liquid journal March 1998
S PATIALLY H ETEROGENEOUS D YNAMICS IN S UPERCOOLED L IQUIDS journal October 2000
Spatiotemporal Hierarchy of Relaxation Events, Dynamical Heterogeneities, and Structural Reorganization in a Supercooled Liquid journal September 2010
Geometry of Slow Structural Fluctuations in a Supercooled Binary Alloy journal March 2010
Length scales of dynamic heterogeneities in a network of fluctuating mechanical constraints journal January 2011
Structurally determined directionality identifies the boundary between mobile and immobile domains in a disordered material journal February 2012
Information-Theoretic Measurements of Coupling between Structure and Dynamics in Glass Formers journal August 2014
Perspective: Supercooled liquids and glasses journal August 2012
Structure, dynamics and multiple length-scales in network-forming materials journal July 2016
Carbonate Melts and Carbonatites journal January 2013
Carbon dioxide transport in molten calcium carbonate occurs through an oxo-Grotthuss mechanism via a pyrocarbonate anion journal February 2016
Low Temperature Densification and Electrical Property of a Carbonate-Added Proton Conducting Ceramic journal April 2011
Molecular-dynamics simulation of molten alkali carbonates journal October 1990
Molecular dynamics simulation of molten Li 2 CO 3 and Na 2 CO 3 journal January 1990
Insight into the Li 2 CO 3 –K 2 CO 3 eutectic mixture from classical molecular dynamics: Thermodynamics, structure, and dynamics journal March 2016
Molecular dynamics of molten Li2CO3–K2CO3 journal February 2008
Low-Dimensional Network Formation in Molten Sodium Carbonate journal April 2016
Stable prenucleation mineral clusters are liquid-like ionic polymers journal September 2011
Molten Carbonates as Electrolytes: Viscosity and Transport Properties journal January 1963
Viscosities of Molten Alkali Carbonates. journal January 1999
Viscosities of Li2CO3-Na2CO3 and Li2CO3-K2CO3 Binary Melts. journal January 1999
Importance of Accurate Data on Viscosity and Thermal Conductivity in Molten Salts Applications journal May 2003
First sharp diffraction peak in the fragile liquid Ca 0.4 K 0.6 ( N O 3 ) 1.4 journal February 2000
Validating a polarizable model for the glass-forming liquid Ca0.4K0.6(NO3)1.4 by ab initio calculations journal September 2000
Ionic dynamics in the glass-forming liquid Ca 0.4 K 0.6 ( N O 3 ) 1.4 : A molecular dynamics study with a polarizable model journal February 2001
Charge equilibration for molecular dynamics simulations journal April 1991
Constructing ab initio force fields for molecular dynamics simulations journal March 1998
Dynamical fluctuating charge force fields: Application to liquid water journal October 1994
Molten salts : Volume 1, Electrical Conductance, Density and Viscosity Data journal January 1968
Molten Salts: Volume 3 Nitrates, Nitrites, and Mixtures: Electrical Conductance, Density, Viscosity, and Surface Tension Data journal July 1972
Pressure and Density Series Equations of State for Steam as Derived from the Haar–Gallagher–Kell Formulation journal January 1988
A unified formulation of the constant temperature molecular dynamics methods journal July 1984
Canonical dynamics: Equilibrium phase-space distributions journal March 1985
Trace-Ion Diffusion in Molten Alkali Carbonates journal January 1965
The relationship between fragility, configurational entropy and the potential energy landscape of glass-forming liquids journal January 2001

Cited By (2)

Ionic conductivity of molten alkali-metal carbonates A 2 CO 3 (A = Li, Na, K, Rb, and Cs) and binary mixtures (Li 1−x Cs x ) 2 CO 3 and (Li 1−x K x ) 2 CO 3 : A molecular dynamics simulation journal August 2019
CO3+1 network formation in ultra-high pressure carbonate liquids journal October 2019

Figures / Tables (5)