Simone
AgI有α黄色六方和β橙色立方两种。前者密度5.683克/厘米3,于146℃转化为β；后者密度6.010克/厘米3，熔点558℃，沸点1506℃。放于光中变色，最后变黑。几乎不溶于水易和稀酸，微溶于氨水，溶于氰化钾溶液。
有α黄色六方和β橙色立方两种。前者密度5.683克/厘米3,于146℃转化为β；后者密度6.010克/厘米3，熔点558℃，沸点1506℃。放于光中变色，最后变黑。几乎不溶于水易和稀酸，微溶于氨水，溶于氰化钾溶液。
本身是黄色的 暴露在空气中变黑色 嘻嘻 化学学得还可以的！
Silver iodide can exist in three crystal polymorphs atatmospheric pressure . Below 147°C the β -phase isstable; this has a wurtzite structure with the iodide ions arranged in a hexagonal close packed structure and with the silver ions occupying a sublattice of in-terstitial tetrahedral sites. Above 147°C silver iodide undergoes a crystalline transition to the high tempera-ture α -phase, which has a body centred cubic arrange-ment of iodine ions with the silver ions distributed
over a sublattice of interstitial sites whose number ex-ceeds the occupancy of silver ions. This phase is sta-ble up to the melting temperature of 555°C. Also present below 147°C is the metastable γ-phase which differs from the β-phase in that it has a zinc blende structure with the iodide ions occupying a cubic close packed lattice.
黄色沉淀
