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Repercussions of size heterogeneity on the measurement of specific surface areas of colloidal minerals: Combination of macroscopic and microscopic analyses

  • Marie-Camille Jodin , Fabien Gaboriaud EMAIL logo and Bernard Humbert
Published/Copyright: March 28, 2015
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American Mineralogist
From the journal American Mineralogist Volume 89 Issue 10

Abstract

The nature and the extent of reactive crystalline surfaces for colloidal particles is an essential factor for understanding of reactions at the solid-liquid interfaces. The measurement of this specific surface area for colloidal mineral particles is usually obtained from gas-adsorption isotherms. This measurement, based on adsorbate-adsorbent interactions, yields overall weight-averaged values that fail to display the distribution of geometrical specific surface areas of individual particles. The present work proposes to use three dimensional atomic force microscopy (AFM) images to characterize the distribution of geometrical features of hexagonal plate-like gibbsite [Al(OH)3] particles without microporosity. This sub-micrometer approach, which requires minute quantities of solids (picograms), demonstrates the broad distribution of specific surface areas (lateral, basal, and total) determined for each individual particle in our sample. The resulting weight-averaged specific surface area values of basal and lateral surfaces, calculated from this distribution, agree with values measured by Kr-adsorption isotherms. The lateral specific surface area values thus obtained confirm the estimates given by and are correlated with the infrared spectrum analysis proposed in our previous papers. Moreover, these results reveal the importance of the smallest particles in the overall distribution, whereas the weight-averaged value is monitored by high-mass particles that are few in number. This kind of specific surface area heterogeneity must be taken into account in describing the reactivity of anisotropic shaped mineral particles.

Received: 2003-10-7
Accepted: 2004-4-25
Published Online: 2015-3-28
Published in Print: 2004-10-1

© 2015 by Walter de Gruyter Berlin/Boston

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  13. Repercussions of size heterogeneity on the measurement of specific surface areas of colloidal minerals: Combination of macroscopic and microscopic analyses
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  23. Synthesis of REE and Y phosphates by Pb-free flux methods and their utilization as standards for electron microprobe analysis and in design of monazite chemical U-Th-Pb dating protocol
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  26. Piston-cylinder calibration at 400 to 500 MPa: A comparison of using water solubility in albite melt and NaCl melting
  27. Letter. Comparative planetary mineralogy: V/(Cr + Al) systematics in chromite as an indicator of relative oxygen fugacity
  28. Letter. Porous titanosilicate nanorods in the structure of yuksporite, (Sr,Ba)2K4(Ca,Na)14(⃞,Mn,Fe) {(Ti,Nb)4(O,OH)4[Si6O17]2[Si2O7]3}(H2O,OH)n, resolved using synchrotron radiation
https://doi.org/10.2138/am-2004-1013

Articles in the same Issue

  1. The origin of the color of pearls in iridescence from nano-composite structures of the nacre
  2. “Invisible„ gold revealed: Direct imaging of gold nanoparticles in a Carlin-type deposit
  3. Behavior of cation vacancy in kenotetrahedral Cr-spinels from Albanian eastern belt ophiolites
  4. Displacement and strain fields around a [100] dislocation in olivine measured to sub-angstrom accuracy
  5. Kiglapait mineralogy IV: The augite series
  6. Metasomatic formation of kosmochlor-bearing diopside in peridotite xenoliths from North Island, New Zealand
  7. Determination of standard thermodynamic properties of sulfides in the Ag-Au-S system by means of a solid-state galvanic cell
  8. Hydroxyl ordering in igneous apatite
  9. Accommodation of the carbonate ion in apatite: An FTIR and X-ray structure study of crystals synthesized at 2–4 GPa
  10. Mg/Si ratios of aqueous fluids coexisting with forsterite and enstatite based on the phase relations in the Mg2SiO4-SiO2-H2O system
  11. The activity of silica, water, and the equilibration of intermediate and silicic magmas
  12. The CO2–H2O system: IV. Empirical, isothermal equations for representing vapor-liquid equilibria at 110–350 °C, P ≤ 150 MPa
  13. Repercussions of size heterogeneity on the measurement of specific surface areas of colloidal minerals: Combination of macroscopic and microscopic analyses
  14. The crystal-structure of synthetic NaNa2Mg5Si8O21(OH)3, a triclinic C1̄ amphibole with a triple-cell and excess hydrogen
  15. High-pressure phase transitions in Ca0.2Sr0.8Al2Si2O8feldspar
  16. Phase transition of Ca-perovskite and stability of Al-bearing Mg-perovskite in the lower mantle
  17. Mineralogy and petrology of a mullite-bearing pseudotachylyte: Constraints on the temperature of coseismic frictional fusion
  18. New developments in two-feldspar thermometry
  19. Ordered distribution of Au and Ag in the crystal structure of muthmannite, AuAgTe2, a rare telluride from Sacarîmb, western Romania
  20. Polytypism of cookeite in low-grade metapelites of the Cameros Basin, Spain: Lack of correlation of well-ordered polytypes with pressure
  21. Evolution of mineral compositions during eclogitization of subducting basaltic crust
  22. Mass balance during retrogression of eclogite-facies minerals in the Rongcheng eclogite, eastern Sulu ultrahigh-pressure terrane, China
  23. Synthesis of REE and Y phosphates by Pb-free flux methods and their utilization as standards for electron microprobe analysis and in design of monazite chemical U-Th-Pb dating protocol
  24. The chemistry and crystal structure of okanoganite-(Y) and comparison with vicanite-(Ce)
  25. An automated system for phase identification and quantitative composition determination using the electron microprobe: Theory and applications
  26. Piston-cylinder calibration at 400 to 500 MPa: A comparison of using water solubility in albite melt and NaCl melting
  27. Letter. Comparative planetary mineralogy: V/(Cr + Al) systematics in chromite as an indicator of relative oxygen fugacity
  28. Letter. Porous titanosilicate nanorods in the structure of yuksporite, (Sr,Ba)2K4(Ca,Na)14(⃞,Mn,Fe) {(Ti,Nb)4(O,OH)4[Si6O17]2[Si2O7]3}(H2O,OH)n, resolved using synchrotron radiation
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