[Analysis on 24 Samples of Fluoritum by XRD Pattern].

Objective: To provide the reference for effective identification of Fluoritum,by using X-ray diffraction technique to analyze Fluoritum samples which had different morphological features.

Methods: According to the China Pharmacopeia( 2010 edition),the24 samples of commercial Fluoritum were identified and their contents of Ca F2 were determined. XRD technique was applied to analyze phase compositions and content from Fluoritum samples, to ensure quality, and to summarize the correlation between traits and quality.

Results: Sample 1 ~ 7 and 13 were Fluoritum, samples 8 ~ 12 were inferior products which were doped, and sample 14 ~ 24 were counterfeit products. Fluorite was the main phase of Fluoritum, and often accompanying a small amount of quartz. Phase compositions of counterfeit Fluoritum whose impurity content were high were relatively complicated, and the contents of Ca F2 were far below the standards value of the China Pharmacopeia( 2010 edition). Fluoritum were easy to be shattered into tiny sand which were green or purple, hyaline and lustered, with color becoming shallow.

Conclusion: By picking to remove impurity, inferior products can be used for medicine. Because impurity content are high and the impurities are difficult to be separated, counterfeit products can not be used for medicine. Characteristics of powder can be used for supplement the identification for Fluoritum. And using XRD technique can accurately identify Fluoritum samples which have different morphological features.