The chemical formula is KIO 3 . The normal salt and acid salt KH(IO 3 ) 2 are commonly known. The normal salt is a colorless monoclinic crystal. It has a slightly distorted perovskite (perovskite) type structure, CaTiO 3 . Therefore, I is surrounded by six Os, and there are no independent IO 3 - s . The interatomic distance I-O is 2.23 Å. It has transition points at 75°C and 220°C, and the highest temperature phase is a rhombohedral lattice. The room temperature phase exhibits strong birefringence and strong piezoelectricity. It has a melting point of 560°C (with decomposition). It is more stable than the chlorates and bromates, but will explode if heated or shocked when mixed with flammable substances such as organic matter. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
化学式KIO3。正塩および酸性塩KH(IO3)2が普通に知られている。正塩は無色単斜晶系結晶。わずかにひずんだペロブスキー石(灰チタン石)CaTiO3型構造。したがってIは6個のOに囲まれており,独立したIO3-は存在しない。原子間距離I―O2.23Å。75℃と220℃に転移点があり,最高温相は菱面体格子。室温相は強い複屈折と強い圧電気が認められる。融点560℃(分解を伴う)。塩素酸塩,臭素酸塩よりは安定であるが,有機物などの可燃性物質と混ぜて熱するか,衝撃を与えると爆発する。
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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