寧夏明礬:十(shi)二(er)水(shui)(shui)硫(liu)酸(suan)鋁(lv)(lv)鉀(jia)(jia),又稱:明(ming)礬(fan)(fan)(fan)、白礬(fan)(fan)(fan)、鉀(jia)(jia)礬(fan)(fan)(fan)、鉀(jia)(jia)鋁(lv)(lv)礬(fan)(fan)(fan)、鉀(jia)(jia)明(ming)礬(fan)(fan)(fan),是含有(you)結晶(jing)(jing)水(shui)(shui)的硫(liu)酸(suan)鉀(jia)(jia)和硫(liu)酸(suan)鋁(lv)(lv)的復鹽。無(wu)色(se)立(li)方晶(jing)(jing)體(ti)(ti),外(wai)表常(chang)呈八面體(ti)(ti),或(huo)與立(li)方體(ti)(ti)、菱形十(shi)二(er)面體(ti)(ti)形成聚形,有(you)時以{111}面附(fu)于(yu)(yu)容器壁上而(er)形似六方板狀(zhuang),屬于(yu)(yu)α型明(ming)礬(fan)(fan)(fan)類(lei)復鹽,有(you)玻璃(li)光澤。密度1.757g/cm3,熔點92.5℃。92.5℃時失(shi)去9個(ge)分子(zi)結晶(jing)(jing)水(shui)(shui),200℃時失(shi)去12個(ge)分子(zi)結晶(jing)(jing)水(shui)(shui)。溶(rong)于(yu)(yu)水(shui)(shui),不(bu)溶(rong)于(yu)(yu)乙醇。明(ming)礬(fan)(fan)(fan)性味(wei)酸(suan)澀,寒;有(you)抗菌作用(yong)(yong)、收斂作用(yong)(yong)等(deng)(deng),可用(yong)(yong)做中(zhong)藥。明(ming)礬(fan)(fan)(fan)還可用(yong)(yong)于(yu)(yu)制備鋁(lv)(lv)鹽、發酵粉、油漆、鞣(rou)料、澄清劑、媒染(ran)劑、造紙(zhi)、防水(shui)(shui)劑等(deng)(deng),在我們的生(sheng)活(huo)中(zhong)常(chang)用(yong)(yong)于(yu)(yu)凈水(shui)(shui)。