NMR evidence for five-coordinated silicon in a silicate glass at atmospheric pressure

JF Stebbins - Nature, 1991 - nature.com
Abstract KNOWLEDGE of the structure of liquid silicates is essential to understanding the
properties of materials ranging from magmas in lava flows to melts in glass processing. At 1 …

Silicon coordination changes from 4-fold to 6-fold on devitrification of silicon phosphate glass

TL Weeding, B De Jong, WS Veeman, BG Aitken - Nature, 1985 - nature.com
Fold oxygen coordinated tetrahedral silicon (IVSi) is the common building block in silicas
and silicates. However, 17 crystallographically well-characterized inorganic silicates are …

Structural characterization of pentacoordinate silicon in a calcium silicate

RJ Angel, NL Ross, F Seifert, TF Fliervoet - Nature, 1996 - nature.com
IN silicate minerals formed at pressures typical of the Earth's crust, the silicon is usually
coordinated by four oxygen atoms. In contrast, silicates formed at higher pressures, typical of …

Identification of multiple structural species in silicate glasses by 29Si NMR

JF Stebbins - Nature, 1987 - nature.com
Abstract Knowledge of the structure of silicate glasses is one key to understanding their
chemical and physical properties, as well as those of the high-temperature liquids from …

Silicon coordination and speciation changes in a silicate liquid at high pressures

X Xue, M Kanzaki, RG Trønnes, JF Stebbins - Science, 1989 - science.org
Coordination and local geometry around Si cations in silicate liquids are of primary
importance in controlling the chemical and physical properties of magmas. Pressure …

Six-coordinated silicon in glasses

R Dupree, D Holland, MG Mortuza - Nature, 1987 - nature.com
It has been accepted since 1932 that the building block of silicate glasses consists of silicon
tetrahedrally coordinated to 4 oxygen atoms1. Although the existence of 6-coordinated …

Instantaneous structure of an MgSiO3 melt simulated by molecular dynamics

Y Matsui, K Kawamura - Nature, 1980 - nature.com
A series of molecular dynamics (MD) calculations1 has been carried out to visualize the
atomic configuration in MgSiO3 melt and glass. The 'computer-generated'configuration …

NMR evidence for excess non-bridging oxygen in an aluminosilicate glass

JF Stebbins, Z Xu - Nature, 1997 - nature.com
The most common of man-made glasses have aluminosilicate compositions, and such
glasses also form from rapidly cooling magmas. Oxygen is the most abundant element in …

Pressure-induced amorphization of crystalline silica

RJ Hemley, AP Jephcoat, HK Mao, LC Ming… - Nature, 1988 - nature.com
The crystalline-to-amorphous transformation in the solid state is currently the subject of
intense study. With the seminal discovery of amorphization of H2O ice I under pressure1 …

The nature of the glass transition in a silica-rich oxide melt

I Farnan, JF Stebbins - Science, 1994 - science.org
The atomic-scale dynamics of the glass-to-liquid transition are, in general, poorly
understood in inorganic materials. Here, two-dimensional magic angle spinning nuclear …