Mierospecimons of troilite from the Jilin meteorite No. Ⅰ, weighing only 200--500 micrograms, have been determined for S, Fe, Ni and Co. The sample is firstly
An aecount has been given of the spectrographic method for quantitative determination of minerals, ineluding sample treatment and spectrographic analysis. The f
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