“…With DAC, phase-pure samples of a metastable allotrope of silicon, Si-III or BC8, were synthesized by direct elemental transformation at 14 GPa and about 900 K and also at significantly reduced pressure in the Na-Si system at 9.5 GPa by quenching from approximately 1000 K, and this could help us to tackle challenges in electronic and photovoltaic applications. 167 Because of their remarkable mechanical properties, Mg-transition-metal (TM)rare-earth (RE) alloys containing a synchronized long-periodstacking order (LPSO) structure have received significant attention. Unexpectedly, under high pressure (5 GPa) and high temperature (723 K), a new type of long-period superlattice Mg 77 Zn 9 Yb 14 was found in Mg 97 ZnYb 2 alloys.…”