| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Bobos, Iuliu
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (4/4 displayed)
- 2017The Application of Functionalized Pillared Porous Phosphate Heterostructures for the Removal of Textile Dyes from Wastewatercitations
- 2015Morphological and Chemical Characterization of Mineral Concretions in the Freshwater Bivalve Anodonta cygnea (Unionidae)citations
- 2001Kaolinite to halloysite-7 angstrom transformation in the kaolin deposit of Sao Vicente de Pereira, Portugalcitations
- 2000Dissolution of K-feldspar into Si-Al gel and crystallization of halloysite identified in the kaolin deposit of Sao Vicente de Pereira (Portugal)
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article
Dissolution of K-feldspar into Si-Al gel and crystallization of halloysite identified in the kaolin deposit of Sao Vicente de Pereira (Portugal)
Abstract
Dissolution of K-feldspar into Si-Al non-crystalline phase was identified in the kaolin deposit of Sao Vicente de Pereira (Portugal). The gel having a SiO2/Al2O3 ratio approximately equal to the unity, crystallized into halloysite-0.7 nm. SEM investigations carried out on K-feldspar grains show a vacuolar texture characterized by etch-pits of various dimensions. The pits exhibit various shapes, either polygonal or circular. The gel was identified by SEM on the K-feldspar surfaces and by TEM in the < 2 mu m clay fractions. TEM images display tubes of halloysite-0.7 nm surrounding flakes of SI-AI gel. Relicts of K-feldspar pseudomorphs submitted to amorphization are identified by TEM. SAED analyses confirmed the non-crystalline state of the gel. Electron microprobe analyses attested a very fast destabilization of the chemical structure of K-feldspar grains.