Results 51 to 60 of about 13,752 (229)

The effect of fluorine on viscosities in the system Na2O-Al2O3-SiO2: implications for phonolites, trachytes and rhyolites [PDF]

open access: yes, 1985
The effect of fluorine on melt viscosities of five compositions in the system Na2O-Al2O3- SiO2h as been investigateda t one atmospherea nd 1000-1600'Cb y concentric-cylinder viscometry.
Cronin, David J.   +2 more
core   +1 more source

Industrial mineral resources of Zambia [PDF]

open access: yes, 2000
Zambia has for many years been heavily dependent upon the mining of copper which, combined with cobalt production, represents over 98% of mineral sales and 75% of export earnings (1997 figures).
Mitchell, Clive
core  

Chemical diffusivity of boron in melts of haplogranitic composition [PDF]

open access: yes, 1993
Chemical diffusivities of B in synthetic melts of haplogranitic composition have been measured by the diffusion couple technique at 1 atm between 1200–1600°C.
Chakraborty, Sumit   +2 more
core   +1 more source

The architecture and chemistry of a dug-out : the Dufuna canoe in ethno-archaeological perspective [PDF]

open access: yes, 2006
This research work emanated from a joint research project between the Johann-Wolfgang Goethe-University Frankfurt am Main, Germany and the University of Maiduguri, Nigeria; as outlined in the Bilateral Agreement of July 21st 1988.1 The research program ...
Garba, Abubakar
core  

Hardness Toxicity and Multi‐Route, Multi‐Demographic Health Risks of Nitrate‐Contaminated Groundwater: A Call for Sustainable Environmental and Public Health Protection

open access: yesWater Resources Research, Volume 62, Issue 5, May 2026.
Abstract Groundwater contamination by nitrate and hardness poses critical challenges to environmental sustainability and public health across many regions. This research pioneers an integrated assessment of nitrate multi‐route exposure for six‐age groups and hardness toxicity in Ghana.
Johnson C. Agbasi   +5 more
wiley   +1 more source

Preliminary site report for the 2005 ICDP-USGS deep corehole in the Chesapeake Bay impact crater [PDF]

open access: yes, 2006
First report for the ICDP-USGS 1.7-km-deep corehole drilled into the central part of the Chesapeake Bay impact crater during ...
Browning, J. V.   +15 more
core  

Electrochemical Lithium‐Ion Recovery from Battery Recycling Process Water

open access: yesChemSusChem, Volume 19, Issue 8, 28 April 2026.
A high‐purity Lithium‐ion solution was recovered by implementing a simple two‐step process combining the wet‐shredding of spent Lithium‐ion batteries with efficient electrochemical desalination. This work provides a simple and novel approach for the electrochemical extraction of Lithium ions from spent batteries.
Peter Rolf Burger   +5 more
wiley   +1 more source

Circular Potential of Lithium‐Ion Battery Recycling Slags: Quantifying Microstructure and Elemental Distribution for a Holistic Valorization

open access: yesAdvanced Science, Volume 13, Issue 22, 17 April 2026.
A lithium‐bearing slag is investigated with the goal of holistic valorization. The present β‐eucryptite (LiAlSiO4) exhibits a high lithium content and low levels of impurities. The spinel contains most of the chromium and vanadium, representing additional valorization opportunities.
Peter Cornelius Gantz   +9 more
wiley   +1 more source

Inclusions of Amorphous and Crystalline SiO2 in Minerals from Itrongay (Madagascar) and Other Evidence for the Natural Occurrence of Hydrosilicate Fluids

open access: yesGeosciences, 2022
Experimental studies increasingly often report low-temperature (200–800 °C) and low-pressure (0.05–3 kbar) hydrosilicate fluids with >40 wt.% of SiO2 and >10 wt.% of H2O.
Daniil V. Popov   +2 more
doaj   +1 more source

Ambiguities in Assigning Single‐Crystal NMR Data to Individual Atoms in the Crystal Structure: A Case Study of Hambergite, Be2BO3OH, by 9Be and 11B NMR Spectroscopy, XRD Measurements and DFT Calculations

open access: yesMagnetic Resonance in Chemistry, Volume 64, Issue 4, Page 400-415, April 2026.
The fundamental question of how to assign NMR resonances to specific atoms in the unit cell is addressed by using the 9Be and 11B spectra of the natural mineral hambergite as a model system. ABSTRACT The NMR interaction tensors of 9Be and 11B of hambergite, Be 2BO 3OH, were derived from single‐crystal NMR experiments.
Jennifer Steinadler   +6 more
wiley   +1 more source

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