Nanoscopic Grooving on Vesicle Walls in Submarine Basaltic Glass

2011 ◽  
pp. 230-249
Keyword(s):  
Basaltic Glass

WATER CONCENTRATIONS IN BASALTIC GLASS: IMPLICATIONS FOR SUBGLACIAL ERUPTION PROCESSES

2016 ◽  
Author(s):  
Carver E. Lee ◽  
◽  
Sheila Seaman ◽  
Dave McGarvie
Keyword(s):  
Basaltic Glass

Volcanic Glass as a Natural Analog for Borosilicate Waste Glass

1993 ◽  
Vol 333 ◽  
Author(s):  
Maury E. Morgenstein ◽  
Don L. Shettel
Keyword(s):  
Silica Glass ◽  
Glass Structure ◽  
Volcanic Glass ◽  
Waste Glass ◽  
Tensile Failure ◽  
Tensile Fracture ◽  
Failure Behavior ◽  
Basaltic Glass ◽  
Glass Waste ◽  
Natural Analog

ABSTRACTObsidian and basaltic glass are opposite end-members of natural volcanic glass compositions. Syngenetic and diagenetic tensile failure in basaltic glass (low silica glass) is pervasive and provides abundant alteration fronts deep into the glass structure. Perlitic fracturing in obsidian (high silica glass) limits the alteration zones to an “onion skin” geometry. Borosilicate waste glass behaves similarly to the natural analog of basaltic glass (sideromelane).During geologic time, established and tensile fracture networks form glass cells (a three-dimensional reticulated pattern) where the production of new fracture surfaces increases through time by geometric progression. This suggests that borosilicate glass monoliths will eventually become rubble. Rates of reaction appear to double for every 12C° of temperature increase. Published leach rates suggest that the entire inventory of certain radionuclides may be released during the 10,000 year regulatory time period. Steam alteration prior to liquid attack combined with pervasive deep tensile failure behavior may suggest that the glass waste form is not license defensible without a metallic- and/or ceramic-type composite barrier as an overpack.

scholarly journals Alteration of synthetic basaltic glass in silica saturated conditions: Analogy with nuclear glass

2018 ◽  
Vol 97 ◽  
pp. 19-31 ◽  
Author(s):  
T. Ducasse ◽  
A. Gourgiotis ◽  
E. Pringle ◽  
F. Moynier ◽  
P. Frugier ◽  
...  
Keyword(s):  
Basaltic Glass

Hydrotalcite Formed by Alteration of R7T7 Nuclear Waste Glass and Basaltic Glass in Salt Brine at 190°C

1993 ◽  
Vol 333 ◽  
Author(s):  
A. Abdelouas ◽  
J. L. Crovisier ◽  
W. Lutze ◽  
R. Müller ◽  
W. Bernotat
Keyword(s):  
Nuclear Waste ◽  
Waste Glass ◽  
Aluminium Content ◽  
Basaltic Glass ◽  
Alteration Product ◽  
Nuclear Waste Glass ◽  
Salt Brine ◽  
High Aluminium ◽  
Early Alteration

ABSTRACTThe R7T7 and synthetic basaltic glasses were submitted to corrosion in a saline MgCl2dominated solution at 190°C. For both glasses, the early alteration product is a hydrotalcite-like compound in which HPO42-, SO4-2and Cl-substitutes to CO32. The measured d003spacing is 7.68 Å for the hydrotalcite formed from R7T7 glass and 7.62 Å for the hydrotalcite formed from basaltic glass which reflect the high aluminium content. Chemical microanalyses show that the hydrotalcite is subsequently covered by a silica-rich gel which evolves into saponite after few months.

Experimental seawater-basaltic glass interaction at 50°C: Study of early developed phases by electron microscopy and X-ray photoelectron spectrometry

1983 ◽  
Vol 47 (3) ◽  
pp. 377-387 ◽  
Author(s):  
J.L. Crovisier ◽  
J.H. Thomassin ◽  
T. Juteau ◽  
J.P. Eberhart ◽  
J.C. Touray ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Basaltic Glass ◽  
X Ray

Optical Constants of Basaltic Glass from 0.0173 to 50 μM

1991 ◽  
pp. 102-104 ◽  
Author(s):  
E. T. Arakawa ◽  
D. W. Young ◽  
J. M. Zhang ◽  
P. C. Eklund ◽  
B. N. Khare ◽  
...  
Keyword(s):  
Optical Constants ◽  
Basaltic Glass

Comparative Structural Study and Dissolution of Simplified Glasses: A Radioactive Waste Glass (R7T7) and a Basaltic Glass

1997 ◽  
Vol 506 ◽  
Author(s):  
F. Angeli ◽  
P. Faucon ◽  
T. Charpentier ◽  
J.C. Petit ◽  
J. Virlet
Keyword(s):  
Nuclear Waste ◽  
Magic Angle Spinning ◽  
Waste Glass ◽  
Magic Angle ◽  
Basaltic Glass ◽  
Qualitative Information ◽  
Local Environments ◽  
Nuclear Waste Glass ◽  
Angle Spinning ◽  
Main Components

ABSTRACTThe local cation environments in a borosilicate glass (containing the main components of the French nuclear waste glass, R7T7) and of basaltic-like glass are presented on the basis of17A1 and23Na Multi-Quanta Magic-Angle Spinning Nuclear Magnetic Resonance (MQ-MAS NMR) spectroscopies. The chemical and geometrical environment of each nucleus is characterized. Moreover, qualitative information about the distribution of these parameters, characteristic of the disorder level in the structure, is obtained. These results are presented with the characteristics of the Al and Na dissolution in water at 100°C. The relation between the local environments of these cations and their mass loss in solution is discussed.

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