Results 71 to 80 of about 1,754 (181)

Investigation of the hydrothermally altered K-feldspar use in slag-based alkali-activated binders

Case Studies in Construction Materials
Alkali-activated materials (AAMs) are considered a low-carbon binder and a promising alternative to Portland cement, with both performance and environmental benefits.
Ivo C. Carvalho, Bruna Rosa, Caroline Krauczuk, Maria E. Dembogurski, Gabrielli T. de Oliveira, Ana P. Kirchheim   +5 more
doaj   +1 more source

Sodium diffusion in alkali feldspars: towards the impact of Al/Si ordering

Philosophical Magazine
Tracer diffusion of Na in natural alkali feldspars including sanidine, adularia and orthoclase with different Na:K ratios, minor element contents and different degrees of Al/Si ordering is investigated using the radiotracer technique employing 22Na as the radioisotope. In adularia, the tracer diffusion measurements along the crystallographic directions
Tas, Bengü, Gorfer, Alexander, Petrishcheva, Elena, Wilde, Gerhard, Abart, Rainer, Divinski, Sergiy   +5 more
openaire   +1 more source

Egyptian feldspar for multidimensional performance boosts in alkali-activated slag concrete

Journal of Engineering and Applied Science
The environmental impact of conventional concrete underscores the urgent need for sustainable alternatives. Alkali-activated slag (AAS) concrete offers a lower-carbon solution, Yet its performance remains open to optimization.
Alaa M. Rashad, Youssef A. Mosleh, Ghada M. F. Essa   +2 more
doaj   +1 more source

Geochemical reactions initiated by subglacial abrasion of natural quartz and alkali feldspar

Frontiers in Earth Science
The role of subglacial abrasion in sustaining subglacial microbiomes is an area of growing interest. It is likely that subglacial abrasion produces a range of bio-utilisable compounds, some released from fluid inclusions in the confines of the mineral ...
Beatriz Gill-Olivas, Jon Telling, Martyn Tranter   +2 more
doaj   +1 more source

The Cananeia Alkaline Body in the South Coast of São Paulo State: Mineral Chemistry [PDF]

Geologia USP. Série Científica, 2009
The Cananeia alkaline occurrence of Late Cretaceous age (Ar-Ar, 83.6 Ma) lies in the Ribeira Valley and it is representedby two small bodies: Morro de São João (1.8 km2) in Cananeia Island, and Morrete (0.4 km2), in the neighboringComprida Island.
Celso de Barros Gomes, Fernando Pelegrini Spinelli   +1 more
doaj  

⁴⁰Ar/³⁹Ar DATING OF ALKALINE ROCKS FROM THE BURPALA MASSIF AS A KEY TO UNDERSTANDING ITS FORMATION DURATION

Геодинамика и тектонофизика
The article presents the results of 40Ar/39Ar dating of rocks (quartz and alkali syenites, nepheline syenites with REE-Nb-Zr mineralization) from the Burpala massif using feldspar, phlogopite, and amphibole.
A. V. Ponomarchuk, A. G. Doroshkevich, I. A. Izbrodin, A. V. Malyutina, T. A. Radomskaya   +4 more
doaj   +1 more source

Spinodal decomposition in alkali feldspar studied by atom probe tomography. [PDF]

Phys Chem Miner, 2020
Petrishcheva E, Tiede L, Schweinar K, Habler G, Li C, Gault B, Abart R.   +6 more
europepmc   +1 more source

Multicomponent diffusion in ionic crystals: theoretical model and application to combined tracer- and interdiffusion in alkali feldspar. [PDF]

Phys Chem Miner, 2020
Petrishcheva E, Tiede L, Heuser D, Hutter H, Giester G, Abart R.   +5 more
europepmc   +1 more source

Terms: alkali feldspar and “potassium feldspar”

The Journal of the Geological Society of Japan, 2023
openaire   +1 more source

Pseudomorphism of alkali feldspar to biotite from the alkaline nana complex granite in Cameroon

Discover Geoscience
Alkaline complexes all over the world generally are enriched in high–field strength elements and rare earth elements. This enrichment can be accounted for by magmatic processes, but, many of these complexes display evidence of hydrothermal alteration. In
Pauline Nguet Wokwenmendam, Emmanuel Njonfang, Amidou Moundi, Benjamin Ntieche, Caroline Neh Ngwa, Zakari Nchouwet, Domenico Cozzupoli   +6 more
doaj   +1 more source