Experimental studies have shown that the effective radii of atoms and ions in crystals and molecules are variable. The bonded radii of atoms depend upon their s
Types and degree of muturity of organic matters in sedimentary rocks as index for oil generation and evolution can be determined by infrared spectrometry. In no
On September 13, 1977, the Qingzhen enstatite chondrite fell near Qingzhen county,Kweichow Province (26°32'E, 106°28'N). The total recovered m