New high-pressure polymorph of NiSb2

Hirotsugu Takizawa, Kyota Uheda, Tadashi Endo

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


A new polymorph of NiSb2 was obtained under high-pressure/temperature condition of 6 GPa and 550-650 °C. The crystal structure is orthorhombic with the space group Pbca (No. 61), isostructural with the low-temperature form of NiAs2 (pararammelsbergite). The crystallographic parameters were refined by the Rietveld analysis of the powder X-ray diffraction data (a = 0.62866(2) nm, b = 0.63643(2) nm, c = 1.23670(3) nm, Z = 8). The structure can be regarded as an intermediate structure between the marcasite-type and the pyrite-type. The pararammelsbergite-type NiSb2 is a high-pressure form of NiSb2 and the density is slightly higher than that of ambient pressure form with the marcasite-type structure.

Original languageEnglish
Pages (from-to)1399-1403
Number of pages5
Issue number12
Publication statusPublished - 2000 Dec


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