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本研究测定了巴西的几种磷灰石的一些晶体化学特性，这些矿样具有不同的成因，包括火成型、变质型和沉积型。其研究目的是建立这些磷灰石的晶体化学特性与可浮性行为之间的相关关系。同时还进行了详细的X衍射研究以准确地测定这些磷灰石样品的晶胞参数和结晶度，并进行了全化学分析。此外，还以油酸钠和氨化十二胺为捕收剂，进行了微量浮选研究。研究中还测定了这些磷灰石样品的结晶度，以结晶指数表示，采用标准进制时其数值范围为10．0至4．5。这种结晶指数与可浮性之间具有显著的相关性，当结晶指数小于8时，无论是采用上述两种捕收剂中的那一种，其可浮性均显著下降。另外，延长调浆时时间，结晶度差的磷灰石的可净性也会降低。
This study determined some of the crystallographic properties of several apatites in Brazil that have different genesis including pyrogenic, metamorphic and sedimentary types. The purpose of this study was to establish the correlation between the crystallographic and apatite behavior of these apatites. A detailed X-ray diffraction study was also performed to accurately determine the unit cell parameters and crystallinity of these apatite samples and perform a full chemical analysis. In addition, micro-flotation studies were conducted with sodium oleate and amidated dodecylamine as collectors. The crystallinity of these apatite samples was also determined in the study, expressed in terms of the crystallinity index, in the range of 10.0 to 4.5 for the standard system. There is a significant correlation between this crystallinity index and floatability. When the crystallinity index is less than 8, the floatability of either of these two collectors is significantly reduced. In addition, prolonged slurrying time, poor crystallinity apatite will reduce the net.