{TAIL ~ The content} of Mn, if any, is preferably {HEAD ~ from 1 to 9 mol %} 
{ TAIL ~ The content } of Mn , if any , is preferably { HEAD ~ from 1 to 9 mol % }
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD