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    STUDIA GEOLOGIA - Issue no. 3 / 2003  
         
  Article:   XRD INVESTIGATION OF THE CLAY FRACTION IN SOME ROMANIAN ZEOLITIC VOLCANIC TUFFS AND DIATOMITES.

Authors:  DANA POP, IOAN BEDELEAN, HOREA BEDELEAN.
 
       
         
  Abstract:  Between 1998-2000, the most representative occurrences of zeolitic volcanic tuffs and diatomites from Romania were studied in the view of their possible usage for building materials with improved mechanical and insulating properties, in the frame of an EC funded INCO-COPERNICUS project. The clay fraction (< 2 microns) represents a relatively small amount in the whole rock mass; still, its mineralogy may provide clues for understanding the environment of formation, and could be used as a criterion for correlating various horizons and outcrops. On the other hand, the presence of certain clay species even in small amounts may influence the behavior of the raw materials in applications like production of blended cement and concrete, or synthesis of wollastonite or diopside.  
         
     
         
         
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