泗滨砭石的岩石矿物研究Ⅰ：岩石化学和岩石结构特征与红外发射功能的关系

Petrological and Mineralogical Study of the Sibin Bian-stone I:Relations between Its Petrochemical and Petrotextural Features and Its IR Emission Ability

泗滨砭石是中医用以制造砭具的一种石材，加热后的砭具对人体有加快血液流动和疏通经络等明显的理疗效果。本又用近代岩石学分析测试技术，研究和测定了砭石的徽结构、化学组成、放射性和法向发射率。结果表明，泗滨砭石是一种致密的徽晶粒状结构石灰岩，CaCO2的含量高达96％，不舍有毒元素，放射性核素含量极低。镜下能观察到的其他矿物有黄铁矿、锐铁矿和石墨,粒径1～3μm，分散产于方解石的晶界间；砭石中未见生物残骸，有机碳舍量仅为0.09％。在8～14um光谱区测定的法向发射率高达0．923，说明砭石具有很好的红外发射性能，而方解石高达86.73J/K·mol的热容和微晶致密结构特征，是砭石具有良好热辐射性质和加热后对人体有明显理疗效果的岩石学基础条件。

The Sibin Bian-stone is one of the materials used to make acupuncture tools for stimulating the circulation of the blood in network vessels of human beings. In this paper, the microstructure, chemical composition, radioactivity,and normal emission power of the Sibin Bian-stone have been investigated and measured by using the modern petrological analytical techniques. It is found that this slone is a structurally compact micromeritic limestone with 96% （wt） of CaO2 and without toxinic and radioactive elements. 1 ～ 3μm sized pyrite, anatase and graphite, dis- tributed in the interstices of calcite grains, are observed under microscope. No organic debris has been observed. The content of organic carbon is extremely low （only 0.09%,wt）. Its normal emission power reaches 0. 923 in the 8414 /μm spectrum zone,indicating that the Sibin Bian-stone possesses very good infrared emission ability. We argue that the high thermal capacity of calcite （86.73 J/K·mol） and the compact microcrystalline structure are main basic petrographic conditions for the Sibin Bian-stone being of good physiotherapical functions when it is heated because of its good infrared emission feature.