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如圖：硝酸鎳

硝(xiao)酸鎳碧綠色單(dan)斜晶(jing)系板狀晶(jing)體(ti)，密(mi)度2.05g/cm3，熔點56.7℃，沸點136.7℃（飽和溶(rong)(rong)(rong)液(ye)(ye)）。溶(rong)(rong)(rong)解度96.3 （g/100gH2O）易(yi)溶(rong)(rong)(rong)于(yu)水(shui)(shui)，液(ye)(ye)氨，乙醇，微溶(rong)(rong)(rong)于(yu)丙酮，水(shui)(shui)溶(rong)(rong)(rong)液(ye)(ye)呈(cheng)酸性(xing)，有(you)吸濕性(xing)，潮濕空氣中很快潮解。干燥空氣中緩慢風(feng)化。受熱(re)時會(hui)失(shi)去四個分(fen)(fen)子水(shui)(shui)，溫度高于(yu)110℃時開始分(fen)(fen)解并形成堿式鹽，繼續加熱(re)生成棕黑色的(de)三氧(yang)化二鎳和綠色的(de)氧(yang)化亞鎳的(de)混(hun)(hun)合物(wu)。易(yi)溶(rong)(rong)(rong)于(yu)水(shui)(shui)，水(shui)(shui)溶(rong)(rong)(rong)液(ye)(ye)呈(cheng)酸性(xing)，溶(rong)(rong)(rong)于(yu)氨水(shui)(shui)，液(ye)(ye)氨，氧(yang)化劑，與有(you)機物(wu)還(huan)原及易(yi)燃(ran)物(wu)硫(liu)，磷等混(hun)(hun)合有(you)引起燃(ran)燒和爆炸(zha)危(wei)險。57℃時溶(rong)(rong)(rong)于(yu)其結晶(jing)水(shui)(shui)中，進一步(bu)加熱(re)失(shi)去結晶(jing)水(shui)(shui)，灼燒時可(ke)得(de)Ni2O3.