What is the specific heat of the bentonite ore?
About the specific heat capacity of 700900J/kg/.
Bentonite is a complex mixture of many clay minerals, not montmorillonite, kaolinite, illite and so on. Different places of bentonite, mineral composition is not the same, the chemical composition is not the same.
Bentonite is a mixture, and its specific heat is not fixed. I suggest you actually measure it.