Beidelltie clay from Chang-yuan, Taiwan; geology and mineralogy

Chen, P.-Y.; Wan, Hsien-Ming; Brindley, G. W.

doi:10.1180/claymin.1976.011.3.04

Cited by 12 publications

(6 citation statements)

References 2 publications

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“…From comparison of measured CEC values with the value calculated for an ideal beidellitic structure (the muscovite-pyrophyllite compositional trend), the CEC of higher charged minerals is lower than ideal. Similar nonideal CEC can be seen in the data of Grim and Kulbicki (1961) and Chen and Brindley (1976) for natural, fully expandable minerals. Similar CECs were found for synthetic dioctahedral smectites in the beidellite-montmorillonite series (Velde, unpublished).…”

Section: Correlations Of Physical and Chemical Propertiessupporting

confidence: 83%

Compositional Variation in Component Layers in Natural Illite/Smectite

Velde

1986

Clays and clay miner.

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Abstract--Published chemical data for suites of mixed-layer minerals from diagenetic sedimentary rocks, hydrothermally altered tufts, and a metasomatic bentonite bed indicate that the layer charge and composition of the different components of illite/smectite (I/S) differ from one geological environment to another. It appears that the composition of the elemental smectite and illite layers in the I/S is more or less constant for samples within each geologic setting. In the examples considered, the smectite layers are predominantly montmorillonitic in character (i.e., the charge is in the octahedral site), whereas the illite layers show different types of charge sites, depending upon the suite studied. Illite layers appear to have about the same charge in all three suites studied, slightly more than 0.7 per O~o(OH)2 unit, whereas the smectite layers in the different suites range in charge from about 0.3 to 0.7 per Oao(OH)2 unit. Cationexchange capacities reflect these differences in charge, although not ideally. The differences in the composition of the component layers in each geologic suite of mixed-layer clays are probably due either to differences in the bulk chemistry of the rocks in the different suites or to differences in intensive variables, such as temperature and pressure, of the regime under which they have formed.

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Section: Correlations Of Physical and Chemical Propertiessupporting

confidence: 83%

Compositional Variation in Component Layers in Natural Illite/Smectite

Velde

1986

Clays and clay miner.

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“…14. The ternary variation diagram of the main octahedral cations for smectites (TA = Tatatilla-and OT = Otay-type montmorillonites after Grim & Kulbicki, 1961;Schultz, 1969;Weaver & Pollard, 1973; CH-Cheto-type montmorillonites after Grim & Kulbicki, 1961;Schultz, 1969;Weaver & Pollard, 1973;Bystrom-Brusewitz, 1976; Wy = Wyoming-type montmorillonites and Fe-M = Fe-rich varieties after Grim & Kulbicki, 1961;Schultz, 1969;Bystrom-Brusewitz, 1976; BI = beidellite and Fe-BI = Fe-rich beidellites after Grim & Kulbicki, 1961;Schultz, 1969;Hamilton, 1971;Weaver & Pollard, 1973;Chen et al 1976;Bystrom-Brusewitz, 1976).…”

Section: Discussionmentioning

confidence: 99%

“…The octahedral composition of smectites is shown on a Mg-Al-Fe triangular diagram (Fig. 14) which was constructed by adding the fields of various workers (Grim & Kulbicki, 1961;Schultz, 1969;Hamilton, 1971;Weaver & Pollard, 1973;Bystrom-Brusewitz, 1976;Chen et al, 1976) drawn for dioctahedral smectites. Smectites plot close to the Al corner next to the Wyoming type montmorillonites and also in the beidellite field.…”

Section: Fig 10 the Nomenclature Of Pyroclastic Products In The Benmentioning

confidence: 99%

Mineralogical and geochemical characteristics of late Cretaceous bentonite deposits of the Kelkit Valley Region, northern Turkey

Yalçın

Gümüşer

2000

Clay miner.

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Late Cretaceous bentonitic clays in the Kelkit Valley region of Turkey are composed of an alternation of limestone lenses and silicified tuff nodule-bearing pyroclastic rocks and their alteration products. Quartz, feldspar, biotite, trace amounts of augite together with pumice and volcanic rock fragments comprise the volcanogenic components. Diagenetic minerals are represented by clay, calcite, opal-CT, zeoliteand dolomite. The clay fraction is dominated by smectite and lesser amounts of I-S, illite, chlorite and kaolinite. The d001 basal spacing of dioctahedral smectites ranges from 12.51 to 12.55Å in Na-smectites and 14.97 to 15.52 A˚in Ca-smectites. The CaO/Na2O ratio of smectites ranges from 0.15 to 19.50, and the interlayer Na and Ca contents are 0.22–0.30 in beidellitesand 0.02–0.09 while those in montmorillonites are 0.01–0.13 and 0.03–0.15, respectively. The data obtained indicate that bentonites formed in a marine environment by the alteration of volcanic ash of rhyodacitic/dacitic and intermediate/acidic composition.

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“…The main mineralogical composition of Zhisin clay is beidellite, associated with a mixed-layer illite-smectite, kaolinite, dusty pyrite, microquartz, cristobalite, calcite, dolomite, plagioclase, and gypsum. 6) Characterization tests on Zhisin clay included chemical composition, consistency limits, grain size distribution, specific gravity, and pH and Eh measurements. The chemical TECHNICAL REPORT composition of Zhisin clay was determined by X-ray fluorescence spectrometry (XRF).…”

Section: Experimental Program 1 Materials Propertiesmentioning

confidence: 99%

“…Primary solvation sphere consists of some highly orientated water molecules around the Na þ ion. Outside the primary solvation sphere is a secondary sphere of water molecules also affected by sodium ion's non-irradiatedno 3x10 5 Gy irradiation 6x10 5 Gy irradiation 1x10 6 Gy irradiation charge. Water molecules in the secondary solvation sphere are more randomly oriented.…”

Section: Effects Of Saline Solutionmentioning

confidence: 99%

Swelling Behavior of a Potential Buffer Material under Simulated Near Field Environment

Huang

CHEN

2004

J. Nucl. Sci. Technol.

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Swelling behavior is an important property in achieving the low-permeability sealing function of buffer material. In this study, free swelling tests were conducted on a potential buffer material under various near field environmental conditions. The potential buffer material used is a locally available clayey material known as Zhisin clay. Experimental results show that Zhisin clay is a temperature-sensitive Ca-bentonite. The maximum swelling strain decreases with increasing hydrothermal temperatures due to lattice contraction. Dry heating of Zhisin clay causes reduction in its cation exchange capacity, which in turn results in decreases of swelling strain. The effects of gamma radiation on the physical and chemical properties of Zhisin clay are found to be similar to those of dry heating. The swell of Zhisin clay under simulated underground geochemistry is affected by both the type of electrolyte and the concentration of solution.

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Beidelltie clay from Chang-yuan, Taiwan; geology and mineralogy

Cited by 12 publications

References 2 publications

Compositional Variation in Component Layers in Natural Illite/Smectite

Compositional Variation in Component Layers in Natural Illite/Smectite

Mineralogical and geochemical characteristics of late Cretaceous bentonite deposits of the Kelkit Valley Region, northern Turkey

Swelling Behavior of a Potential Buffer Material under Simulated Near Field Environment

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