> And then, problems with preferred orientation occured.
[...]
> Even
> after mixing 25% biotite and 75% Cab-osil, in volume,
> one cannot expect to be able to pack the sample : the
> 75% Cab-osil tends to decrease to a few percent after
> packing, so that the preferred orientation is not reduced.
We tend to favour instant coffee as a bulking agent / randomising
medium. It's nearly x-ray transparent, and can be washed off with
care. It's also readily available in most laboratories! It just
doesn't look very scientific when you write it up...
--
Graham Patterson http://www.rdg.ac.uk:80/~slspatte
Sedimentology: The hard study of soft rocks
*** Opinions expressed are mine unless otherwise stated ***
