An X-ray examination of mordenite (ptilolite)

C. Waymouth, P. C. Thornely, W. H. Taylor
1938 Mineralogical Magazine and Journal of the Mineralogical Society  
The structures of the fibrous zeolites edingtonite, thomsonite, and natrolite (with scolecite and mesolite) were determined by X-ray methods some years ago, and it was suggested shortly afterwards by M. H. Hey and F. A. Bannister in a private communication to one of us (W.H.T.) that 'ptilolite', another zeolite of fibrous habit, might prove to have a similar structure. An X-ray rotation photograph about the needle axis indicated a unit-cell dimension along the needle axis of approximately 7·5
more » ... approximately 7·5 Å., quite different from the axis c 6·6 Å. characteristic of the fibrous zeolites previously examined, and no further examination of 'ptilolite' was made at that time. We have now determined the unit cell and space-group of this crystal, and further work is in progress with a view to the complete analysis of the structure. This paper presents an account of the experimental data which we have obtained.
doi:10.1180/minmag.1938.025.163.04 fatcat:xw7jwoxk6nfcfpscwwauibyvd4