Results 201 to 210 of about 4,580 (237)

Mineralogy of Gondwana Sequence in Barapukuria Formation, Bangladesh [PDF]

, 2017
HOSSAIN Ismail, ISLAM Md. Sultan-Ul-, ROY Rita Rani, TALUKDER Shawon, TSUNOGAE Toshiaki   +4 more
core  

Efficacy and Safety of Oral Herbal Medicine Combined with Diosmectite for Pediatric Rotavirus Gastroenteritis: A Systematic Review and Meta-Analysis. [PDF]

Healthcare (Basel)
Cho JH, Kim EJ, Sung HK, Min SY.
europepmc   +1 more source

Sustainable magnesium doped nanofibrillated cellulose/bentonite composite for enhanced phosphate removal: process optimization and mechanistic insights. [PDF]

RSC Adv
Pandey A, Kalamdhad AS, Sharma YC.
europepmc   +1 more source

Genesis of dioctahedral K- and Na-bearing micas at the strongly altered late proterozoic unconformity of the Tandilia belt, central-eastern Argentina

, 2015
Juan Cruz Martínez, Hans Joachim Massonne, Jorge A. Dristas, María Cristina Frisicale   +3 more
openalex   +1 more source

MINERALOGICAL STUDIES OF HYDROTHERMAL DIOCTAHEDRAL MICA MINERALS

MINERALOGICAL STUDIES OF HYDROTHERMAL DIOCTAHEDRAL MICA MINERALS
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Dehydroxylation of Dioctahedral Phyllosilicates

Clays and Clay Minerals, 1980
AbstractMössbauer spectroscopy of dioctahedral phyllosilicates showed that on dehydroxylation iron which originally occupied M(2) and M(l) sites became, respectively, 5- and 6-coordinated. The 6-coordinated sites are very distorted. No migration of cations occurs in the course of heating the specimens for 1–3 hr at 600°–700°C.By using a combination of ...
L. Heller-Kallai, I. Rozenson
openaire   +1 more source

The variable charge of dioctahedral smectites

Journal of Colloid and Interface Science, 2013
One of the most important properties of smectites is the cation exchange capacity resulting both from the structural permanent charge and the pH depending variable charge. The variable charge, in turn, mainly results from the edge aluminol groups (in the case of dioctahedral smectites).
S, Kaufhold, R, Dohrmann
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Mössbauer Spectra of Dioctahedral Smectites

Clays and Clay Minerals, 1977
AbstractMössbauer spectra of 15 smectites were investigated. In these samples, ferric iron occupies both M(1) and M(2) octahedral sites, the distribution being partly determined by the relative covalency of the bonds formed.The quadrupole splittings are linearly related to b−3.
I. Rozenson, L. Heller-Kallai
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A comprehensive characterization of dioctahedral smectites

Clays and Clay Minerals, 2009
AbstractThe term ‘montmorillonite’ encompasses a wide range of chemical compositions and structures. Comprehensive and reliable characterization is essential for unambiguous classification. Twenty eight purified, Na-exchanged smectites (<0.2 µm) were characterized by layer-charge measurement using the alkylammonium method, by cation exchange ...
Wolters, F., Lagaly, G., Kahr, G., Nüesch, R., Emmerich, K.   +4 more
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Distribution of Ca and Na Ions in Dioctahedral Smectites and Interstratified Dioctahedral Mica/Smectites

Clays and Clay Minerals, 1988
AbstractThe structures of 11 smectites and 2 interstratified mica/smectites containing mainly Ca2+ and Na+ as exchangeable cations in variable ratio were studied under a relative humidity of about 40%. Observed X-ray powder diffraction patterns were compared with diagrams calculated from interstratification models containing 15.2-Å Ca-smectite layers ...
Takashi Iwasaki, Takashi Watanabe
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