Serna C J, White J L, Hem S L
J Pharm Sci. 1978 Aug;67(8):1144-7. doi: 10.1002/jps.2600670831.
The titration of sodium carbonate with aluminum nitrate is shown to produce amorphous aluminum hydroxycarbonate. This compound is not stoichiometric, although the maximum carbonate to aluminum ratio appears to be 0.5. The pH conditions for achieving the maximum carbonate content are concentration dependent. A model for the particle surface at the solution interface is proposed. This model accounts for the presence of carbonate directly coordinated to the aluminum and carbonate adsorbed by electrostatic forces. Sodium is present in the diffuse layer and is, therefore, not an integral part of the structure.
用硝酸铝滴定碳酸钠可生成无定形羟基碳酸铝。该化合物不符合化学计量比，尽管碳酸根与铝的最大比例似乎为0.5。实现最大碳酸根含量的pH条件取决于浓度。提出了溶液界面处颗粒表面的模型。该模型解释了直接与铝配位的碳酸根以及通过静电力吸附的碳酸根的存在。钠存在于扩散层中，因此不是结构的组成部分。
