Mineralogy & Geochemistry › Laboratories › Structural analysis › XRD-Mill McCrone

The XRD-Mill McCrone is used for reproducible, fast and loss-free ultrafine grinding of medium-hard, hard and brittle materials to analytical fineness. The XRD-Mill McCrone delivers very high final finenesses while preserving the crystal structure as far as possible. It achieves a narrow particle size distribution, which makes it particularly suitable for sample preparation for X-ray diffraction, X-ray fluorescence or infrared spectroscopy.

The grinding bowl of the XRD-Mill McCrone consists of a 125 ml polypropylene vessel with a screw-on, self-sealing polyethylene cap. The bowl is filled with an ordered battery of 48 identical grinding media (8 rows of 6 grinding media each), which are made of either agate, zirconium oxide or corundum. The XRD-Mill MCrone grinds mainly by friction. The grinding media are moved in the grinding bowl, which is tumbling on a circular path, whereby the material to be ground is reduced from < 0.5 mm to the lower µm range (typically < 10 µm). Particles with a particle size > 0.5 mm must be pre-crushed with an impact mortar.