Results 71 to 80 of about 1,604 (165)
Journal of Geophysical Research: Planets, Volume 131, Issue 1, January 2026.Abstract Extensive research over the past two decades has shown that early Mars likely had a warmer, wetter climate with widespread water activity. Ferromagnesian (Fe,Mg‐rich) clay deposits are compelling markers of these ancient environments, helping reconstruct Mars' hydrologic evolution, assess past habitability, and guide future exploration.
Jeremy Brossier +8 more
wiley +1 more source
Dehydroxylation of Fe3+, Mg-rich dioctahedral micas: (I) structural transformation
, 2000 Celadonite and glauconite samples heated at different temperatures were studied by X-ray and electron diffraction. For dioctahedral micas the in-plane component of the translation between layers (ccos/a), which is strongly dependent on the position of ...
Muller, Fabrice +3 more
core +1 more source
Cation mass-valence sum (CM-VS) approach to assigning OH-bending bands in dioctahedral smectites [PDF]
, 2008 The assignments of OH-bending bands in the infrared (IR) spectra of dioctahedral smectites (montmorillonites, ferruginous smectites, and nontronites) have been revisited using a cation mass-valence sum (CM-VS) approach to quantify octahedral cation ...
Will Gates (13070694)
core +2 more sources
Octahedral cation distribution in palygorskite
, 2009 The OH speciation of 18 palygorskite samples from various localities were evaluated by near infrared spectroscopy (NIR) and compared to the corresponding octahedral composition derived from independent, single-particle analytical electron microscopy (AEM)
Súarez Barrios, Mercedes +6 more
core +1 more source
Management of acute diarrhea in adults in China: a cross-sectional survey
BMC Public Health, 2013 Background The aim of this study was to evaluate the management of acute adult diarrhea in China and assess adherence of clinical practice to national guidelines and 2012 World Gastroenterology Organization guidelines.
Hou Feng-Qin +4 more
doaj +1 more source
A mathematical model to distinguisch the members of the dioctahedral smectite series
, 1981 St atistical (Q-mode) analysis of the chemical compositions of 122 dioctahedral smectites obtained from the literature have enabled the main solid solution ranges (montmorillonite, beidellite and nontronite) to be distinguished on a triangular diagram ...
BRIGATTI, Maria Franca, POPPI, Luciano
core
, 2006 The early stages of amphibole weathering result in the crystallization of several clay mineral species: tri- and dioctahedral smectites, interstratified dioctahedral kaolinite-smectite (K-S), and halloysite.
Caillaud, J. +3 more
core +1 more source
, 2009 We propose a solid-solution model for dioctahedral aluminous phyllosilicates accounting for the main compositional variations, including hydration, observed in natural smectites, interlayered illite/smectite, illites, and phengites from diagenetic to ...
De Andrade, V. +6 more
core +2 more sources
, 2011 Color poster with text, tables, maps, graphs, and images.This project explores the occurrence of a rare dioctahedral micafound along the Cambrian-Precambrian boundary at Big Falls County Park in Eau Claire County, Wisconsin.
Lau, Todd R.
core
, 2006 Background Acute diarrhoea is a common presenting problem to the accident and emergency department. This study aimed to assess the efficacy of dioctahedral smectite (Smecta) in altering the duration and frequency of acute diarrhoea in the adult ...
KH Cheung, WL Yuen
core +1 more source