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Synthetic Allophane and Layer-Silicate Formation in SiO2-Al2O3-FeO-Fe2O3-MgO-H2O Systems at 23°C and 89°C in a Calcareous Environment
Allophane Hisingerite Hydrous feldspathoid Nontronite Poorly-ordered layer silicates “Protoimogolite” Saponite Synthesis
2012/1/4
Solutions containing AlCl3 and Si(OH)4 (concentrations ≤ 1.5 mM with molar Si:Al ratios of 1:2, 1:1 and 3:1) and FeCl2 (0, 0.5 and 1.0 mM) were adjusted to pH 8 with Ca(OH)2, and incubated at 23°C and...
Synthesis of Iron Layer Silicate Minerals under Natural Conditions
Chamosite Greenalite Iron Lembergite Nontronite Synthesis
2011/11/18
Abstract: The low temperature synthesis of iron silicate minerals with clay structures is possible at surface temperatures only under reducing conditions. Under oxidizing conditions clay minerals coul...
Artificial Alteration of Biotite into a 14 A Layer Silicate with Hydroxy-Aluminium Interlayers
Artificial Alteration Biotite 14 A Layer Silicate Hydroxy-Aluminium Interlayers
2012/2/15
Biotite was altered by boiling in 0·2 M AlCl3 solution, and the products were examined by X-ray powder and single-crystal diffraction, chemical analysis and thermogravimetry. The altered material is a...