Four novel white precipitates were prepared by adding the aqueous solution of silver nitrate into the aqueous solution of quaternary ammonium halide salt such as cetyltrimethylammonium bromide (CTAB) or cetyltrimethylammonium iodide (CTAI). The elemental compositions and properties of the materials were characterized by using elemental analyzer,XRD, TG-DTA and IR. The precipitates have been identified as new materials which are different from the well-known silver halides, and are temporarily named as quaternary ammonium silver halides such as cetyltrimethylammonium silver bromide and cetyltrimethylammonium silver iodide. The four molecules are represented by A: C19 H42 NAg2 Br3; B: C19 H42NAgBr2; C:C19 H42 NAg2I3 and D:C19H42 NAg2 I2. We presume these quaternary ammonium silver halides are silver halide compounds whose silver ions have been partially substituted by the positive quaternary ammonium ios.%季铵盐如十六烷基三甲綦经铵(CTAB)或十六烷基碘化铵(CTAI)与硝酸银反应得到新的沉淀物A,B,C和D.测试沉淀物的元素组成以及XRD,TG-DTA和IR,表明沉淀物是不于卤化银的新的化合物,暂时叫做季铵卤化银如十六烷基三甲基溴化银铵或十六烷基三甲基碘化银铵.分子式是A:C19H42NAg2Br3;B:C19H42NAgBr3;C:C19H42NAg2I3;和D:C19H42NAgI2;.我们季铵卤化银是季铵阳离子部分取代卤化银分子中的银离子的结果.
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