X-ray examination of some standard minerals and products of of melted rocks
Abstract
The aim of the present work which was begun after a similar work of V. Michelev (1) was to obtain the standard x-ray powder diffraction patterns of minerals and to determine the mineralogical composition of melted rocks by means of x-ray examination. The methods of optical determination of the mineralogical composition of the melted rocks are not always satisfactory, and therefore the x-ray examination is for the present time a irreplaceable. The x-ray powder method may be applied for the determination of the mineralogical composition of a casting and x-raying is to used to disclose their defects. In order to identify the x-ray diffraction patterns of melted rocks with known minerals we had to obtain as many films of these minerals as possible. By means of the x-ray powder method we have received the diffraction patterns of the following minerals: almandine (Fe₃Al₂Si₃O₁₂), grossular (Ca₃Al₂Si₃O₁₂), actinolite H₃Ca₈(Mg, Fe)₅(SiO₃)₈, hornblende (OH, F)₂ (Na, Ca, K, Mn)₂₋₃ (Mg, Fe, Ti, Mn, Al)₅ (Si, Al)₆O₂₂, synthetic spinel (MgAl₂O₄) and two of melted rocks. In order to avoid some experimental errors in the investigation of minerals it was necessary to have the diffraction patterns of pure specimens and those of specimens with admixture of rock salt (NaCl).
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