THE OPTICAL DETERMINATION OF SPATIAL (THREE-DIMENSIONAL) ORIENTATION OF PLATY CLAY MINERALS IN SOIL THIN-SECTIONS

A TECHNIQUE IS DESCRIBED TO DETERMINE THE THREE-DIMENSIONAL ORIENTATION OF PLATY CLAY MINERALS AND MINERAL AGGREGATES IN SOIL THIN-SECTIONS BY MEANS OF A POLARIZING MICROSCOPE EQUIPPED WITH A UNIVERSAL STAGE AND A BEREK COMPENSATOR. THE METHOD UTILIZES THE ESTABLISHED GEOMETRICAL RELATIONSHIPS BETWEEN THE BASAL CLEAVAGE AND THE MAXIMUM OR MINIMUM APPARENT BIREFRINGENCE IN AN ARBITRARY CROSS-SECTION OF A PLATY CLAY MINERAL. APPLYING THIS METHOD, IT IS UNNECESSARY TO KNOW OR DETERMINE THE THICKNESS OF THE THIN-SECTION, THE REFRACTIVE INDICES OR THE ACTUAL BIREFRINGENCE OF THE CLAY MINERALS INVOLVED. /AUTHOR/RRL/

  • Supplemental Notes:
    • Vol 1, No 3/4, PP 359-369, 5 FIG, 13 REF
  • Corporate Authors:

    Geoderma, Amsterdam /Netherlands

    ,    
  • Authors:
    • Lafeber, D
  • Publication Date: 1967-5

Subject/Index Terms

Filing Info

  • Accession Number: 00237613
  • Record Type: Publication
  • Source Agency: Road Research Laboratory /UK
  • Files: TRIS
  • Created Date: Apr 12 1971 12:00AM