Darstellung und Eigenschaften einiger neuer Arsenat- und Vanadat-Halogen-Apatite

Preparation and Properties of Some New Arsenate and Vanadate Halogen Apatites The preparation of new apatite-like compounds of the composition Na₂Nd₂Pb₆(RO₄)₆X₂ (with R = As, V and X = Cl, Br and also R = P and X = Br) is reported. Crystallographic data for these as well as for the already known Na₂Nd₂Pb₆(PO₄)₆Cl₂ are determined from the corresponding X-ray powder diagrams. Also the infrared and Raman spectra were recorded and briefly discussed.