4 edition of Data showing a relation between Li and F in trioctahedral smectites found in the catalog.
Data showing a relation between Li and F in trioctahedral smectites
Harry C. Starkey
|Statement||by Harry C. Starkey|
|Series||Open-file report -- 84-271, U.S. Geological Survey open-file report -- 84-271|
|Contributions||Geological Survey (U.S.)|
|The Physical Object|
[Montmorillonite] Warwick – Tweed Heads Exploration Data Package Vol. 2, Mineral occurrence data sheets, occurrence lists and mineral occurrence maps: R.E. Brown, H.F. Henley and W.J. Stroud, December, Published by the Geological Survey of New South Wales. 1 1 REVISION 3 2 3 Trioctahedral Fe-rich micas: relationships between magnetic behavior 4 and crystal chemistry 5 Maria Franca Brigatti1, Marco Affronte2, Chiara Elmi1, Daniele Malferrari1, Angela Laurora1. 6 7 1Dipartimento di Scienze Chimiche e Geologiche, Università di Modena e Reggio Emilia, Via S. 8 Eufemia, 19, I Modena, Italy; 2Dipartimento di Scienze Fisiche, Informatiche e.
New trioctahedral Mg-smectites were synthesized hydrothermally from homogeneous Mg–Si precipitates having a wide range of compositions, i.e., from Mg= to 6, vs. Si=8 in the atomic ratios. Dispersed solutions of the synthetic smectites formed transparent gels . Interpretation of the composition of trioctahedral micas, (Geological Survey) [Foster, Margaret Dorothy] on *FREE* shipping on qualifying offers. Interpretation of the composition of trioctahedral micas, (Geological Survey)Author: Margaret Dorothy Foster.
CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Ahstraet--Trioctahedral smectite and regularly interstratified chlorite/smectite in strata of the East Berlin Formation of the Connecticut Valley are largely restricted to black shale and gray mudstone deposited in alkaline, perennial lakes. The precursor of the mixed-layer clay appears to have been a smectite. Computer animation of center of mass coordinates obtained from ps molecular dynamics simulations of Cs-smectite hydrates (1/3 and 2/3 water monolayers) provided information concerning the structure and dynamics of the interlayer region that could not be obtained through traditional simulation analysis methods. Cs+ formed inner sphere complexes with the mineral surface, .
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Data showing a relation between Li and F in trioctahedral smectites By Harry C. Starkey Open-File Report This report is preliminary and has not been edited or reviewed for conformity with U.S.
Geological Survey standards and nomenclature. Any use of trade names is for descriptive purposes only and does not imply endorsement by the : H.C. Starkey. Get this from a library. Data showing a relation between Li and F in trioctahedral smectites. [Harry C Starkey; Geological Survey (U.S.)].
Li clay varies with the synthesis duration, the synthesis temperature, and with [Li(aq)] (Fig. 1, Fig. 2, Table 1).At all temperatures, Li clay initially increases as a function of time, and then remains constant.
[Li(clay)] reaches a steady-state after 2 weeks at °C, and after 2 months at 75 and 90 °C. This is a key point for the interpretation of the data: longer experiments would not Cited by: The samples included smectites in Mg, Ca, Na, Li, K, and Cs forms and covered the full range of the smectite LC ( to e per formula unit).
Relationship between nOÀD and total charge. In this sense, smectites from Spanish lacustrine systems with an intermediate composition between di- and trioctahedral smectites have also been described by Mayayo et al. But these authors suggested that they are the result of physical stacking, in different proportions, of di- and trioctahedral smectites in the same by: 8.
A new method for identifying the trioctahedral smectites saponite, stevensite and hectorite is proposed in this study. The method is based on differences in the X-ray diffraction (XRD) patterns of the three smectites after (a) heating at °C for 90 min and (b) glycerol solvation of the Cs-forms of the smectites for 20 h.
AB ST R ACT: A new method for identifying the trioctahedral smectites saponite, stevensite and hectorite is proposed in this study. The method is based on differences in the X-ray diffraction (XRD) patterns of the three smectites after (a) heating.
The relationship betwe en the. whereas trioctahedral smectites display d. at ºC or show two dehyd roxylation reactions.
The samples, which dehydroxylated a t high tempera. Abstract. The chemical form of structural Fe in smectites influences many physicochemical properties of these clay minerals. Powder EXAFS data for structural Fe in smectites have been reported; however, the preferred orientation of clay platelets with respect to the X-ray beam may lead to erroneous conclusions on the local chemical environment.
show there are approximately five cations in the oc-tahedral positions, indicating solid solution between dioctahedral and trioctahedral composition. The name swinefordite ('swainf8dait) has been proposed for this new smectite.
The name and the mineral have been approved by the Commission of New Minerals and Mineral Names, International. In contrast the F-smectites are richer in the swelling component: LAP B contains only 10–20% discrete collapsed layers, whereas LAP JS is free of discrete collapsed layers (data not shown).
Nevertheless both types of F-smectites may contain collapsed layers. Smectites are typical layers of clay minerals, composed of two tetrahedral silicate sheets (T) and one octahedral sheet (O).
In each layer, the octahedral sheet is sandwiched between the two tetrahedral sheets (TOT) ().In the tetrahedral sheets, the dominant cation is Si 4+, but it can often be substituted by trivalent cation such as Al 3+.In the octahedral sheet, the common cations are Al. Trioctahedral is a see also of dioctahedral.
Dioctahedral is a see also of trioctahedral. As adjectives the difference between dioctahedral and trioctahedral is that dioctahedral is (mineralogy) having two of the three octahedral sites occupied by cations while trioctahedral is (mineralogy) having all three octahedral sites occupied by cations.
Abstract A new method of measuring the layer charge of smectites by IR spectroscopy is proposed based on the integrated intensity measurement of the band assigned to the ammonium fundamental u4 mode of NH 4 + -exchanged clays.
Measurements are made before and after Li fixation (Hofman & Klemen effect). These allow the quantitative determination of the total charge, equivalent to CEC, and.
Smectites are found the world over, but they occur only rarely as large, mono-mineralic deposits with homogeneous chemical compositions. Mineral syntheses in the laboratory have been performed to obtain clay minerals with controlled compositions and properties (see reviews by Kloprogge et al., ; Zhang et al., ).For smectites, most such syntheses were devoted to trioctahedral and Al.
Discussion of relation between mica composition and oc Analyses and data for writing formulas of trioctahedral micas not used in correlation study (in order of decreasing formulas, which show the range in composition of the different groups: Phlogopite Mg biotite Fe+2 biotite.
Both smectites, Figs. andare montmorillonite because the basal spacing is about nm by the Greene-Kelly test (Li + saturation, heating at °C, and glyceration).
Montmorillonite has a greater amount of isomorphous substitution at the octahedral sites than the other smectites. Synthesis and structural characterization of ferrous trioctahedral smectites: Implications for clay mineral genesis and detectability on Mars Steven M.
Chemtob1,2, Ryan D. Nickerson1, Richard V. Morris3, David G. Agresti4, and Jeffrey G. Catalano1,2 1Department of Earth and Planetary Sciences, Washington University, St. Louis, Missouri, USA, 2McDonnell Center for the. The mineral chemistry of twenty chlorite samples from the United States Geological Survey (USGS) spectral library and two other regions, having a wide range of Fe and Mg contents and relatively constant Al and Si contents, was studied via infrared (IR) spectroscopy, near-infrared (NIR) spectroscopy, and X-ray fluorescence (XRF) analysis.
Five absorption features of the twenty samples near Sedimentary rocks at Yellowknife Bay (Gale crater) on Mars include mudstone sampled by the Curiosity rover. The samples, John Klein and Cumberland, contain detrital basaltic minerals, calcium sulfates, iron oxide or hydroxides, iron sulfides, amorphous material, and trioctahedral smectites.
The John Klein smectite has basal spacing of ~10 angstroms, indicating little interlayer. The Cs-smectites we investigated were (Table 1): Cs-hectorite with and H 2O per unit cell (1/3 and 2/3 water monolayer), Cs-beidellite with 1/3 water monolayer, and Cs-montmorillonite with 1/3 and 2/3 water monolayer.
Caesium-smectites with,and mono-layers of water also were modeled for up to 10 million MC.Other articles where Trioctahedral structure is discussed: clay mineral: General features: of octahedral sheet is called trioctahedral, and the latter dioctahedral.
If all the anion groups are hydroxyl ions in the compositions of octahedral sheets, the resulting sheets may be expressed by M2+(OH)2 and M3+(OH)3, respectively.
Such sheets, called hydroxide sheets, occur singly, alternating.Several layer silicates comprising di- and trioctahedral smectites of different layer charge between and per formula unit and a trioctahedral vermiculite were studied by an in situ method that allowed Fourier transform infrared spectroscopy (FTIR) spectra and water vapor sorption isotherms to be obtained simultaneously.
The particle size and shape of the selected materials were.