1992 年 61 巻 7 号 p. 2304-2308
The crystal structure of nickel trimethylenediamine nitrite perchlorate Ni(C3H10N2)2NO2ClO4 (NINO) has been studied by single-crystal X-ray diffraction. The space group symmetry (Pbn21: ba\barc setting of Pna21) and structure parameters were determined at 23°C with R=0.035 for 1734 observed reflections. The difference between the structures of NINO and Ni(C2H8N2)2NO2ClO4 (NENP) is discussed. The origin of the spontaneous electric polarization in NINO is also discussed.
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