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Formation and stability of Al, Fe, and Mg interlayers in montmorillonite and vermiculite

Creator:: Carstea, Dumitru Dumitru
Abstract:: The effects of pH and time on the formation of hydroxy-Al, Fe, and Mg interlayer were compared for montmorillonite and vermiculite. The stability of interlayers was evaluated by sequentially increasing the severity of dissolution treatments and by subjecting the inter-layers to an HC1 treatment. The interlayer formation and stability were...
Resource Type:: Dissertation
Full Text:: montmorillonite and vermiculite AN ABSTRACT OF THE THESIS OF DUMITRU DUMITRU CARSTEA for the Ph.D. in SOILS

Conditions of Al, Fe, and Mg interlayer formation in montmorillonite and vermiculite

Creator:: Carstea, Dumitru Dumitru
Abstract:: The influence of pH (titration method) and of salt concentration and drying (drying method) upon the formation of synthetic AI, Fe, and Mg interlayers in montmorillonite and vermiculite was investigated. Interlayer formation was evaluated by X-ray diffraction measurements of basal spacings using a natural chlorite for comparison. The titration method...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF DUMITRU DUMITRU CARSTEA for

Nature of interlayer material in silicate clays of selected Oregon soils

Creator:: Singleton, P. C.
Abstract:: A study was conducted to investigate the nature of hydroxy interlayers in the chlorite-like intergrade clays of three Oregon soils with respect to kind, amount, stability, and conditions of formation. The clays of the Hembre, Wren, and Lookout soils, selected to represent weathering products originating from basaltic materials under humid,...
Resource Type:: Dissertation
Full Text:: other hand, recent laboratory studies by Carstea (1965) have shown that it is much easier to form

Changes in lattice spacing of expanding clay minerals

Creator:: Sayegh, Antoine Hanna
Resource Type:: Dissertation
Full Text:: results, Dumitru Carstea, Department of Soils, Oregon State University. 12 medium of dispersion

Mineralogical and chemical characteristics of western Oregon Andic soils

Creator:: Franklin, William Talbert
Abstract:: A study was conducted to determine the mineralogy and chemical properties of "Ando-like" western Oregon soils. The samples were collected from 13 sites which formed mainly from basaltic rocks, a contact metamorphic rock, sedimentary rocks, and alluvium derived from sedimentary rock and from volcanic rock. All samples contained small amounts...
Resource Type:: Dissertation
Full Text:: smectite treated to remove the interlayer material (Carstea, 1967) tended to become amorphous with

Clay mineralogy and related chemical properties of soils formed on Mazama pumice

Creator:: Chichester, Frederick Wesley
Abstract:: A sequence of soil profiles was sampled along a climate-vegetation transect on the dated Mazama pumice fall in central Oregon. The <2 μ size fraction from each sample was characterized with respect to the relative significance of amorphous and crystalline components, and the individual minerals of the latter group were...
Resource Type:: Dissertation

Relational Networks for Visual Relationship Detection in Images

Creator:: Nguyen, Khoi
Abstract:: This thesis is about visual relationship detection. This is an important task in computer vision. The goal is to detect all visual relationships in a given image between objects. This thesis presents a new approach to this problem. Our approach does not use an object detector as a common pre-processing...
Resource Type:: Masters Thesis
Full Text:: vision, pages 740–755. Springer, 2014. [17] Wei Liu, Dragomir Anguelov, Dumitru Erhan, Christian Szegedy

Sorption of NH₃ in a dry system in relation to the chemical properties of clays and soils

Creator:: James, D. W. (David W.), 1929-
Abstract:: The physico-chemical reactions of ammonia in soils and clays have many practical and theoretical implications. On the one hand, large quantities of anhydrous ammonia are used annually in agriculture for fertilizer; the dry gas is applied directly to the soil by simply injecting it below the ground surface. On the...
Resource Type:: Dissertation
Full Text:: the preparation of the manuscript. Thanks is also expressed to Mr. Dumitru Carstea who aided in

Water loss and uptake in clayey subsoil materials

Creator:: Stannard, Davis Robertson
Abstract:: B and C horizon samples from twenty four selected profiles along a north-south transect in the Willamette Valley were examined for possible correlation between shrinkage properties and kind of clay minerals present. Observations of linear shrinkage, weight loss from a condition of maximum plasticity, and changing character of X-ray diffraction...
Resource Type:: Masters Thesis

Heat flow results from plate boundary observatory boreholes in California

Creator:: McDonald, Kyle Joseph
Abstract:: An integral component to understanding lithospheric rheology, fault mechanics, and geodynamic processes is knowledge of the subsurface thermal regime. This study presents thermal data from 26 new borehole sites drilled during the installation of borehole strain meters as part of the Plate Boundary Observatory (PBO). These data extends existing coverage...
Resource Type:: Masters Thesis
Full Text:: as 10- 15 km thick [Dumitru, 1988]. The western flank of the Great Valley is underthrust by the

ScholarsArchive@OSU

Formation and stability of Al, Fe, and Mg interlayers in montmorillonite and vermiculite

Conditions of Al, Fe, and Mg interlayer formation in montmorillonite and vermiculite

Nature of interlayer material in silicate clays of selected Oregon soils

Changes in lattice spacing of expanding clay minerals

Mineralogical and chemical characteristics of western Oregon Andic soils

Clay mineralogy and related chemical properties of soils formed on Mazama pumice

Relational Networks for Visual Relationship Detection in Images

Sorption of NH₃ in a dry system in relation to the chemical properties of clays and soils

Water loss and uptake in clayey subsoil materials

Heat flow results from plate boundary observatory boreholes in California

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