Clay-size (<4 micron) Only XRD Analysis

Semi-quantitative determination of clays and other minerals in the <4 micron fraction. A final data table includes calculation of weight percent mineralogy, weight percent <4 micron material, and determination of mixed-layer clay types, ordering, and percent expandable interlayers (if any).

A Clay analysis can be done by itself but it is usually combined with a Bulk analysis to completely characterize a sample.

A Bulk and Clay (<4 micron) XRD Analysis involves semi-quantitative (weight percent) determination of all rock-forming and clay/phyllosilicate minerals. A final data table includes weight percent mineralogy. Also included is determination of mixed-layer clay types, ordering, and percent expandable interlayers (if any).

Clay minerals routinely analysed for are:
  • Illite and Mica
  • Glauconite
  • Chlorite
  • Kaolinite
  • Smectite
  • Mixed-Layer Illite/Smectite (R=0, R=1 and R=3)
  • Mixed-Layer Chlorite/Smectite