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

Title: Atomic and Electronic Structure in MgO–SiO2

Journal Article · · Journal of Physical Chemistry. A, Molecules, Spectroscopy, Kinetics, Environment, and General Theory
ORCiD logo [1]; ORCiD logo [2];  [3]; ORCiD logo [2];  [2];  [4];  [1];  [5];  [5];  [6];  [7];  [8];  [9]; ORCiD logo [10];  [11];  [11]; ORCiD logo [12];  [13]; ORCiD logo [14]; ORCiD logo [14] more »;  [4];  [4] « less
  1. Kyoto Univ. (Japan); National Institute for Materials Science (NIMS), Tsukuba (Japan)
  2. National Institute for Materials Science (NIMS), Tsukuba (Japan)
  3. Research Organization for Information Science and Technology (RIST), Tokyo (Japan)
  4. Japan Aerospace Exploration Agency (JAXA), Tsukuba (Japan)
  5. Hirosaki Univ. (Japan)
  6. Tohoku Univ., Sendai (Japan); Institute of Physical and Chemical Research (RIKEN), Tokyo (Japan)
  7. Okayama Univ. (Japan)
  8. Kyoto Univ. (Japan)
  9. Tohoku Univ., Sendai (Japan)
  10. National Institute of Technology (Japan)
  11. Advanced Engineering Services Co., Ltd. (Japan)
  12. Shimane University (Japan)
  13. Eidgenoessische Technische Hochschule (ETH), Zurich (Switzerland)
  14. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Understanding disordered structure is difficult due to insufficient information in experimental data. Here, we overcome this issue by using a combination of diffraction and simulation to investigate oxygen packing and network topology in glassy (g-) and liquid (l-) MgO–SiO2 based on a comparison with the crystalline topology. We find that packing of oxygen atoms in Mg2SiO4 is larger than that in MgSiO3, and that of the glasses is larger than that of the liquids. Moreover, topological analysis suggests that topological similarity between crystalline (c)- and g-(l-) Mg2SiO4 is the signature of low glass-forming ability (GFA), and high GFA g-(l-) MgSiO3 shows a unique glass topology, which is different from c-MgSiO3. We also find that the lowest unoccupied molecular orbital (LUMO) is a free electron-like state at a void site of magnesium atom arising from decreased oxygen coordination, which is far away from crystalline oxides in which LUMO is occupied by oxygen’s 3s orbital state in g- and l-MgO–SiO2, suggesting that electronic structure does not play an important role to determine GFA. We finally concluded the GFA of MgO–SiO2 binary is dominated by the atomic structure in terms of network topology.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
2438746
Journal Information:
Journal of Physical Chemistry. A, Molecules, Spectroscopy, Kinetics, Environment, and General Theory, Journal Name: Journal of Physical Chemistry. A, Molecules, Spectroscopy, Kinetics, Environment, and General Theory Journal Issue: 4 Vol. 128; ISSN 1089-5639
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

References (45)

The structure of molten binary silicate systems CaO-SiO2 and MgO-SiO2 journal December 1977
In situ diffraction studies of magnesium silicate liquids journal July 2008
Status of the Electrostatic Levitation Furnace (ELF) in the ISS-KIBO journal June 2018
Structure analysis of MgSiO3 glass journal April 1983
Topologically disordered networks of rigid polytopes journal August 1990
A straightforward method for generating soft transferable pseudopotentials journal May 1990
Thermodynamic modelling of melting in the system FeO-MgO-SiO2-O2 at pressure of 1 bar. journal June 2000
Ring statistics analysis of topological networks: New approach and application to amorphous GeS2 and SiO2 systems journal June 2010
The Nanoscale Ordered MAterials Diffractometer NOMAD at the Spallation Neutron Source SNS
  • Neuefeind, Jörg; Feygenson, Mikhail; Carruth, John
  • Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 287 https://doi.org/10.1016/j.nimb.2012.05.037
journal September 2012
Pressure induced structural transformations in amorphous MgSiO3 and CaSiO3 journal September 2019
High-Temperature Levitated Materials book January 2010
Local Structure of Magnesium in Silicate Glasses: A 25 Mg 3QMAS NMR Study journal June 2008
Short-Range Structure of Invert Glasses along the Pseudo-Binary Join MgSiO 3 −Mg 2 SiO 4 : Results from 29 Si and 25 Mg MAS NMR Spectroscopy journal October 2009
Vitreous forsterite (Mg 2 SiO 4 ): Synthesis, structure, and thermochemistry journal July 2001
Topological versus chemical ordering in network glasses at intermediate and extended length scales journal May 2005
Origin of the mixed alkali effect in silicate glass journal December 2019
Structure and properties of densified silica glass: characterizing the order within disorder journal December 2020
Very sharp diffraction peak in nonglass-forming liquid with the formation of distorted tetraclusters journal June 2020
Formation of bridgmanite-enriched layer at the top lower-mantle during magma ocean solidification journal January 2020
The structure of liquid silicates. Part 2.—Molar volumes and expansivities journal January 1958
Glass formation and structure in the MgSiO3–Mg2SiO4 pseudobinary system: From degraded networks to ioniclike glasses journal September 2009
Rationale for mixing exact exchange with density functional approximations journal December 1996
Relationship between topological order and glass forming ability in densely packed enstatite and forsterite composition glasses journal August 2011
Network topology for the formation of solvated electrons in binary CaO-Al2O3 composition glasses journal May 2013
Packing and the structural transformations in liquid and amorphous oxides from ambient to extreme conditions journal June 2014
Hierarchical structures of amorphous solids characterized by persistent homology journal June 2016
Reverse Monte Carlo Simulation: A New Technique for the Determination of Disordered Structures journal December 1988
A theory of the electrical properties of liquid metals: III. the resistivity of binary alloys journal January 1965
Intermediate-range order in glasses and liquids journal November 1988
Structural studies of disordered materials using high-energy x-ray diffraction from ambient to extreme conditions journal November 2007
Structure of disordered materials under ambient to extreme conditions revealed by synchrotron x-ray diffraction techniques at SPring-8—recent instrumentation and synergic collaboration with modelling and topological analyses journal July 2021
Ordering on different length scales in liquid and amorphous materials journal November 2019
Soft self-consistent pseudopotentials in a generalized eigenvalue formalism journal April 1990
Separable dual-space Gaussian pseudopotentials journal July 1996
Mg coordination in a MgSiO 3 glass using neutron diffraction coupled with isotopic substitution journal June 2011
Generalized Gradient Approximation Made Simple journal October 1996
Fundamental Condition of Glass Formation journal September 1947
Glass Formation at the Limit of Insufficient Network Formers journal March 2004
Formation of Glasses from Liquids and Biopolymers journal March 1995
Coordination changes in magnesium silicate glasses journal July 2004
The crystal structure of orthoenstatite journal May 1969
Understanding diffraction patterns of glassy, liquid and amorphous materials via persistent homology analyses journal January 2019
Structural investigation of Mg local environments in silicate glasses by ultra-high field 25Mg 3QMAS NMR spectroscopy journal April 2007
Evidence for anomalously large degree of polymerization in Mg2SiO4 glass and melt journal May 2008
Structure from glass to melt: a case study along the MgSiO 3 –CaSiO 3 join using neutron and X-ray diffraction journal December 2022