Cation and Anion Ordering in Calcium Phosphate Apatites

磷酸钙磷灰石存在于火成岩、变质岩和沉积岩中。近年来，地质学家对这些矿物的兴趣与日俱增，特别是作为地质环境的指标。S最近的研究表明，对天然磷灰石晶体结构的许多方面还没有很好的了解。建议的研究旨在阐明天然磷灰石的晶体结构。他们将强调自然生成的磷灰石，其化学成分属于地质学家感兴趣的范围，由此产生的数据将补充已发表的文献中已有的数据。这项拟议的研究对地质学家来说应该很重要，他们利用磷灰石矿物的热力学、分配、扩散和退火特性来洞察地质过程。

The calcium phosphate apatites are found in igneous, metamorphic, and sedimentary rocks. Interest among geologists in these minerals has increased in recent years, especially as indicators of geologic environment. Recent investigations by the P.I.'s indicate that many aspects of the crystal structures of natural apatites are not well understood. The studies proposed are intended to elucidate the crystal structures of natural apatites. They will emphasize naturally-occurring apatites, whose chemistry falls within ranges of interest to geologists, and the resultant data will complement that already available in the published literature. The proposed research should be important to geologists who use thermodynamics, partitioning, diffusion and annealing properties of apatite minerals to gain insight into geologic processes.