As an example, {TAIL ~ the inventors} achieved {HEAD ~ single crystal growth} of clathrate I Na8Si46 and clathrate II Na24Si136 
As an example , { TAIL ~ the inventors } achieved { HEAD ~ single crystal growth } of clathrate I Na8Si46 and clathrate II Na24Si136
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH