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