... mineralization of the Western Carpathian Mountains. The tobelitic portion of the clay comprises 5–10%. Ammonium was detected both by chemical analysis and by Fourier transform infrared analysis. Some of the ammonium can be assigned to a poorly bound form, not fully fixed in the illitic interlayer. The finest...

...J. H. L. Voncken; H. L. M. Van Roermund; A. M. J. van der Eerden; J. B. H. Jansen; R. C. Erd Abstract Holotype buddingtonite from the Sulphur Bank Quicksilver deposit, Lake County, California, was studied by XRD, IR, STEM, SEM, TGA, DTA and wet chemical analyses. Synthetic anhydrous ammonium...

...A. HALL Abstract The ammonium contents of granites, pegmatites and hydrothermally altered rocks from SW England have been measured. Ammonium levels in the granites are generally high compared with those from other regions, averaging 36ppm, and they differ markedly between intrusions. The pegmatites...