Original paper
Aluminium ordering and clustering in synthetic phlogopite: OH/F influence on the Al-content of phlogopite studied by NMR spectroscopy
Langner, Ramona; Fechtelkord, Michael
European Journal of Mineralogy Volume 24 Number 5 (2012), p. 798 - 814
published: Sep 26, 2012
Abstract
A large number of phlogopites K(Mg3-xAlx)(Al1+xSi3-xO10)(OH)yF2-y were synthesised in hydrothermal experiments at a temperature of 873 K and a pressure of 2 kbar using sol-gel mixed oxides. The nominal composition ranged from xnom = 0.0 to 1.6 and y = ynom = 0.0 to 2.0, i.e. from hydroxyl-phlogopites to OH-free compositions and from trisilicic starting mixtures to extremely Alrich ones. The samples have been analysed by
1h •
19f •
29si •
solid state nmr •
mas •
phlogopite •
fluorine •
x-ray diffraction
Keywords