Magnetite particles 1, wherein the specific surface area of {HEAD ~ the magnetite particles} by {TAIL ~ the BET method} is given by the equation 
by
Magnetite particles 1 , wherein the specific surface area of { HEAD ~ the magnetite particles } by { TAIL ~ the BET method } is given by the equation
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH