碘化银是什么颜色?
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碘化银是什么颜色?
碘化银是什么颜色?
碘化银是什么颜色?
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.
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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！
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。
Silver iodide can exist in three crystal polymorphs atatmospheric pressure [1]. Below 147°C the \2β -phase isstable; this has a wurtzite structure with the iodide ions arranged in a hexagonal close pa...
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Silver iodide can exist in three crystal polymorphs atatmospheric pressure [1]. Below 147°C the \2β -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 \3α -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 \4 γ-phase which differs from the \2 β-phase in that it has a zinc blende structure with the iodide ions occupying a cubic close packed lattice.
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