scholarly journals Effect of Batch Melting Temperature and Raw Material on Iron Redox State in Sodium Silicate Glasses

2011 ◽  
Vol 48 (2) ◽  
pp. 117-120 ◽  
Author(s):  
Bahman Mirhadi ◽  
Behzad Mehdikhani
Keyword(s):  
Melting Temperature ◽  
Sodium Silicate ◽  
Redox State ◽  
Silicate Glasses ◽  
Raw Material ◽  
Iron Redox ◽  
Iron Redox State ◽  
Batch Melting

Accurate predictions of iron redox state in silicate glasses: A multivariate approach using X-ray absorption spectroscopy

2016 ◽  
Vol 101 (3) ◽  
pp. 744-747 ◽  
Author(s):  
M. Darby Dyar ◽  
Molly McCanta ◽  
Elly Breves ◽  
C.J. Carey ◽  
Antonio Lanzirotti
Keyword(s):  
Absorption Spectroscopy ◽  
Redox State ◽  
Silicate Glasses ◽  
Multivariate Approach ◽  
X Ray ◽  
Iron Redox ◽  
X Ray Absorption ◽  
Iron Redox State

scholarly journals Magnetic resonance imaging (MRI) of pharmacological ascorbate-induced iron redox state as a biomarker in subjects undergoing radio-chemotherapy

Redox Biology ◽  
2021 ◽  
Vol 38 ◽  
pp. 101804
Author(s):  
Cameron M. Cushing ◽  
Michael S. Petronek ◽  
Kellie L. Bodeker ◽  
Sandy Vollstedt ◽  
Heather A. Brown ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Redox State ◽  
Resonance Imaging ◽  
Magnetic Resonance Imaging Mri ◽  
Iron Redox ◽  
Radio Chemotherapy ◽  
Iron Redox State

scholarly journals Structure of NaFeSiO4, NaFeSi2O6, and NaFeSi3O8 glasses and glass-ceramics

2020 ◽  
Vol 105 (9) ◽  
pp. 1375-1384 ◽  
Author(s):  
Mostafa Ahmadzadeh ◽  
Alex Scrimshire ◽  
Lucy Mottram ◽  
Martin C. Stennett ◽  
Neil C. Hyatt ◽  
...  
Keyword(s):  
Glass Phase ◽  
Redox State ◽  
Glass Ceramics ◽  
Isothermal Heat Treatment ◽  
X Ray ◽  
Heat Treated ◽  
High Level ◽  
Iron Redox ◽  
X Ray Absorption ◽  
Iron Redox State

Abstract The crystallization of iron-containing sodium silicate phases holds particular importance, both in the management of high-level nuclear wastes and in geosciences. Here, we study three as-quenched glasses and their heat-treated chemical analogs, NaFeSiO4, NaFeSi2O6, and NaFeSi3O8 (with nominal stoichiometries from feldspathoid, pyroxene, and feldspar mineral groups, i.e., Si/Fe = 1, 2, and 3, respectively) using various techniques. Phase analyses revealed that as-quenched NaFeSiO4 could not accommodate all Fe in the glass phase (some Fe crystallizes as Fe3O4), whereas as-quenched NaFeSi2O6 and NaFeSi3O8 form amorphous glasses. NaFeSi2O6 glass is the only composition that crystallizes into its respective isochemical crystalline polymorph, i.e., aegirine, upon isothermal heat-treatment. As revealed by Mössbauer spectroscopy, iron is predominantly present as fourfold-coordinated Fe3+ in all glasses, though it is present as sixfold-coordinated Fe3+ in the aegirine crystals (NaFeSi2O6), as expected from crystallography. Thus, Na-Fe silicate can form a crystalline phase in which it is octahedrally coordinated, even though it is mostly tetrahedrally coordinated in the parent glasses. Thermal behavior, magnetic properties, iron redox state (including Fe K-edge X-ray absorption), and vibrational properties (Raman spectra) of the above compositions are discussed.

High Spatial and Fast Changes of Iron Redox State and Phosphorus Solubility in a Seasonally Flooded Temperate Wetland Soil

Wetlands ◽  
2014 ◽  
Vol 35 (2) ◽  
pp. 237-246 ◽  
Author(s):  
Michael Prem ◽  
Hans Christian Bruun Hansen ◽  
Walter Wenzel ◽  
Lisa Heiberg ◽  
Helle Sørensen ◽  
...  
Keyword(s):  
Redox State ◽  
Wetland Soil ◽  
Temperate Wetland ◽  
Seasonally Flooded ◽  
Iron Redox ◽  
Iron Redox State ◽  
Phosphorus Solubility

Hydroxylamine Complexes of Cytochrome c′: Influence of Heme Iron Redox State on Kinetic and Spectroscopic Properties

2020 ◽  
Vol 59 (19) ◽  
pp. 14162-14170
Author(s):  
Brianna N. Brown ◽  
Kelsey J. Robinson ◽  
Quentin C. Durfee ◽  
Demet Kekilli ◽  
Michael A. Hough ◽  
...  
Keyword(s):  
Cytochrome C ◽  
Redox State ◽  
Spectroscopic Properties ◽  
Heme Iron ◽  
Iron Redox ◽  
Iron Redox State

High-resolution imaging of labile phosphorus and its relationship with iron redox state in lake sediments

2016 ◽  
Vol 219 ◽  
pp. 466-474 ◽  
Author(s):  
Yulu Gao ◽  
Tao Liang ◽  
Shuhan Tian ◽  
Lingqing Wang ◽  
Peter E. Holm ◽  
...  
Keyword(s):  
High Resolution ◽  
Lake Sediments ◽  
Redox State ◽  
High Resolution Imaging ◽  
Labile Phosphorus ◽  
Resolution Imaging ◽  
Iron Redox ◽  
Iron Redox State

Tuning the iron redox state inside a microporous porphyrinic metal organic framework

2017 ◽  
Vol 46 (2) ◽  
pp. 517-523 ◽  
Author(s):  
Brian Abeykoon ◽  
Jean-Marc Grenèche ◽  
Erwann Jeanneau ◽  
Dmitry Chernyshov ◽  
Christelle Goutaudier ◽  
...  
Keyword(s):  
Redox State ◽  
Metal Organic Framework ◽  
Metal Organic ◽  
Iron Redox ◽  
Iron Redox State ◽  
Organic Framework

Tuning the iron redox state inside a microporous porphyrinic metal organic framework.

μXANES study of iron redox state in serpentine during oceanic serpentinization

Lithos ◽  
2013 ◽  
Vol 178 ◽  
pp. 70-83 ◽  
Author(s):  
M. Andreani ◽  
M. Muñoz ◽  
C. Marcaillou ◽  
A. Delacour
Keyword(s):  
Redox State ◽  
Iron Redox ◽  
Iron Redox State

Probing iron redox state in multicomponent glasses by XPS

2012 ◽  
Vol 322-323 ◽  
pp. 145-150 ◽  
Author(s):  
Martin Jensen ◽  
Long Zhang ◽  
Yuanzheng Yue
Keyword(s):  
Redox State ◽  
Iron Redox ◽  
Iron Redox State
Sign in / Sign up

Export Citation Format

Share Document