Nonicosahedral boron allotrope synthesized at high pressure and high temperature

Article

关键词: X-RAY-DIFFRACTION;    SINGLE-CRYSTALS;    ALPHA-GALLIUM;    RAMAN;   

DOI  :  10.1103/PhysRevB.95.180102

来源: SCIE

【 摘 要 】

Theoretical predictions of pressure-induced phase transformations often become long-standing enigmas because of limitations of contemporary available experimental possibilities. Hitherto the existence of a nonicosahedral boron allotrope has been one of them. Here we report on a nonicosahedral boron allotrope, which we denoted as zeta-B, with the orthorhombic alpha-Ga-type structure (space group Cmce) synthesized in a diamond-anvil cell at extreme high-pressure high-temperature conditions (115 GPa and 2100 K). The structure of zeta-B was solved using single-crystal synchrotron x-ray diffraction and its compressional behavior was studied in the range of very high pressures (115-135 GPa). Experimental validation of theoretical predictions reveals the degree of our up-to-date comprehension of condensed matter and promotes further development of solid-state physics and chemistry.

【 授权许可】

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