摘要
本文对现代脊椎动物牙齿及骨骼以及埋藏于黄土中的化石进行了矿物学研究。它们主要由磷灰石组成 ,含 OH-、CO3 2 -和有机质 ,结晶程度很差。现代生物磷灰石为羟基磷灰石。化石磷灰石具 CO3 2 -含量高 ,CO3 2 -占据 PO4 3 -位置 ,并发生重结晶等特点 ,属碳羟磷灰石。化石化作用总趋势是有机质丢失 ,其它钙的磷酸盐溶解 ,CO3 2 -含量增加并置换 PO4 3 -进入晶格和磷灰石重结晶作用。生物磷灰石加热至 12 0 0℃ ,红外光谱仍可见 OH-伸缩振动带。
Samples of modern bone and tooth as well as fossil in loess were studied. They are mainly composed of apatite and contain OH -, CO 2- 3 and organic matter. The modern bone and tooth apatites belong to hydroxyapatite and the fossil apatites to carbonate hydroxyapatite. The latter is characterized by high contents of CO 2- 3, CO 2- 3 replacing PO 3- 4 and recrystallization. The general tendency of fossilization can be summarized as the loss of organic matter dissolution of minor calcic phosphate, increase of CO 2- 3 content, more and more CO 2- 3 substituting for PO 3- 4 at B site and recrystallization of apatite. After heating to 1200℃, OH - stretching band still can be observed in the IR spectrum of biological apatite.
出处
《矿物学报》
CAS
CSCD
北大核心
1999年第1期41-47,共7页
Acta Mineralogica Sinica
基金
国家自然科学基金!(批准号 :4 94 72 0 90 )资助项目
