Talc? I don't think so! Whole Pattern Fitting

Many products are not regulated by a governing body. Quality control is in the hands of those who use these products. For example, Figure 1 shows a white powder from a bottle labeled "talc." When this powder was run on the MiniFlex, talc was observed only in trace quantities (Figure 2). Talc is typically identified as magnesium silicate hydroxide. However, this material is primarily composed of calcite and dolomite identified as calcium/magnesium carbonate (Figure 3).



This material was intended to be used as a drying agent; therefore the intended use is still possible. However, if you were looking for a silicate source, you would not find it here.


New sixth generation MiniFlex X-ray diffractometer (XRD) is a multipurpose analytical instrument that can determine: phase identification and quantification, percent (%) crystallinity, crystallite size and strain, lattice parameter refinement, Rietveld refinement, and molecular structure. It is widely used in research, especially in material science and chemistry, as well as in industry for research and quality control. It is the newest addition to MiniFlex series of benchtop X-ray diffraction analyzers from Rigaku, which began with the introduction of the original MiniFlex system decades ago. Read more...

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