The proportion of {TAIL ~ the hydroxide phase} is in the range 0.15% to 3% by {HEAD ~ weight} of yttrium expressed as yttrium hydroxide relative to the total weight of particles 
The proportion of { TAIL ~ the hydroxide phase } is in the range 0.15 % to 3 % by { HEAD ~ weight } of yttrium expressed as yttrium hydroxide relative to the total weight of particles
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH