This paper finds out distributive pattern ofprincipal minerals in Jiepai kaoline and demonstrates theblack matter to be not onganic matter but fine scaly mica-h
On microscopic and microstructural lev-els,the relations between high Tc superconduc-tivity and percolation have been discussed.On themicroscopic level,the crit
Structures and hydraulic reactivities of min-erals of sulphoaluminate cements, Ca<sub>4</sub>,Al<sub>6</sub>,SO<sub>16</sub>, and Sr-Ca<sub>3</sub>,Al<sub>6</su