Book•
The x-ray identification and crystal structures of clay minerals
01 Jan 1961-
About: The article was published on 1961-01-01 and is currently open access. It has received 966 citations till now. The article focuses on the topics: Clay minerals.
Citations
More filters
TL;DR: An unusual chlorite has been collected from amygdales in Miocene volcanic rock found at Taiheizan, Akita Prefecture, Japan as mentioned in this paper, which is identified as a highly chloritic vermiculite with a small proportion of imperfect hydroxy interlayer.
Abstract: An unusual chlorite has been collected from amygdales in Miocene volcanic rock found at Taiheizan, Akita Prefecture, Japan. The mineral shows subtle variations from other chlorites and related minerals. These are: (a) no apparent expansion with water or ethylene glycol, (b) negligible or no collapse after NH4-saturation or heating at about 300~ (c) a slow decrease in the basal spacing on heating from approximately 400~ to 760~ (d) a small amount of low temperature or capillary water and (e) a DTA curve with a vermiculite-like system of peaks. The mineral is identified as a highly chloritic vermiculite with a small proportion of imperfect hydroxy interlayer.
5 citations
TL;DR: In this article, the nature and composition of silicate/clay minerals present in coals of the Rajhara sub-basin, India, and their changing pattern with progressive metamorphism is presented.
5 citations
TL;DR: In this paper, an aqueous alumina sol was emulsified with an organic solvent (oil phase) for obtaining an water-in-oil (w/o) type emulsion; the high interfacial tension between the water phase and the organic solvent was reduced by the addition of an amphiphilic non-ionic surface active agent (Span 80).
Abstract: Alumina nanospheroids (10–50 nm) were synthesized by the solemulsion-gel method under simultaneous mechanical agitation (750–1500 rpm) and sonication (26 kHz). An aqueous alumina sol (“water phase” of high dielectric constant) was emulsified with an organic solvent (“oil phase” of low dielectric constant) for obtaining an water-in-oil (w/o) type emulsion. 1,1,1-trichloroethane (TCE) was used as the “oil phase”. The high interfacial tension between the “water phase” and the “oil phase” was reduced (i.e., stabilization of the sol droplets) by the addition of an amphiphilic non-ionic surface active agent (Span 80). Two vol% of Span 80 was used in all the experiments. The stabilized sol droplets were subjected to gel formation by increasing the basicity of the emulsion system with an organic amine (triethylamine, TEA). The crystallization of phase-pure α-Al2O3 occurred at a relatively low temperature (800°C, 60 h).Differential thermal analysis (DTA) indicated the crystallization of γ-Al2O3at 378°C as the firs...
5 citations
01 Jan 1972
TL;DR: A map, drawing, or chart was part of the material being photographed and the photographer followed a definite method in "sectioning" the material as mentioned in this paper, which was referred to as map drawing or chart.
Abstract: 3. When a map, drawing or chart, etc., was part of the material being photographed the photographer followed a definite method in "sectioning" the material. It is customary to begin photoing at the upper left hand corner of a targe sheet and to continue photoing from left to right in equal sections with a small overlap. If necessary, sectioning is continued again — beginning below the first row and continuing on until complete.
5 citations
Cites background or methods from "The x-ray identification and crysta..."
...Newman and Brown (1966) investigated the chemical changes of...
[...]
...prescribed by Brown (1961). The following machine conditions were maintained for the analysis...
[...]
5 citations