formation of halloysite from feldspar: low temperature, artificial ...
formation of halloysite from feldspar: low temperature, artificial ... formation of halloysite from feldspar: low temperature, artificial ...
Fig. 3A. Replica of naturally weathered K-feldspar surface showing initial weathering products in form of small bumps and tapered projections. Joining of the lines of alteration products suggest influence of crystal dislocation at site of formation. Sample DWB-3. Fig. 3B. Replica of artificially weathered K-feldspar showing alteration product as line of small bumps grading laterally into flame-shaped sheet.
Fig. 4A. Replica of a naturally weathered K-feldspar surface showing an alteration product developing as rows of overlapping tapered projections. Sample DWB-3. Fig. 4B. Replica of an artificially weathered K-feldspar surface showing development of non-rolled tubes. Line of tubes in right half appears to be based on etch pits like those in upper half of photograph and those in lower right quarter. Tubes are tilted and overlap one another in left half of photograph.
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Fig. 3A. Replica <strong>of</strong> naturally weathered K-<strong>feldspar</strong> surface showing initial weathering<br />
products in form <strong>of</strong> small bumps and tapered projections. Joining <strong>of</strong> the lines <strong>of</strong> alteration<br />
products suggest influence <strong>of</strong> crystal dislocation at site <strong>of</strong> <strong>formation</strong>. Sample DWB-3.<br />
Fig. 3B. Replica <strong>of</strong> <strong>artificial</strong>ly weathered K-<strong>feldspar</strong> showing alteration product as line <strong>of</strong><br />
small bumps grading laterally into flame-shaped sheet.
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