According to table values, clay should have a relatively low emissivity value of about 0,4. Do you have any idea why it is so? I have been thinking maybe it is because of its foliate structure. Any suggestions?
You can get the similar or apropriate answer by searching the keyword in the GOOGLE SCHOLAR page. Usually you will get the first paper similar to your keyword.
From my experience, InsyaAllah this way will help you a lot. If you still have a problem, do not hasitate to let me know.
Kind regards, Dr ZOL BAHRI - Universiti Malaysia Perlis, MALAYSIA