Abstract: Studies were made on mineral Chinese medicine YuYuLiang with X-ray powder diffraction and ICP-AES. The analysis results are given on qualitative, quantitative, crystal size and trace elements, which indicate that YuYuLiang is mainly made up of goethite, hematite, quartz and clay minerals. The clay and its content, the crystal size and trace elements related to human health were found to vary with the origin of the medicine. The results may provide basis for quality evaluation of the medicine.

Key words: X-ray powder diffraction, X-ray powder diffraction, Phase analysis, Chinese mineral medicine, Phase analysis, Chinese mineral medicine, YuYuLiang, YuYuLiang, Goethite, Goethite, Hematite, Hematite, Clay minerals, Crystal size, Clay minerals, Crystal size, Trace elements, Trace elements