Credits for Help received
Index © M. Hewat 1998 Help
The scientific content is due to Dr A.W. Hewat,
who welcomes suggestions for improvement. It is meant for a popular audience, but is
hopefully of interest to physicists and chemists working with materials, and of
The 3D structure drawings were produced in VRML by Marcus Hewat's
xtal-3d application. They were checked
on a 120 MHz Pentium machine running Netscape 4.5 with the SGI Cosmo 2.1
Windows VRML plug-in.
The 2D drawings are simple screen captures of the 3D drawings
displayed on a Silicon Graphics Elan machine using the SGI VRML-Inventor viewer
ivview. The small drawings were automatically
reduced from the large versions by Benjamin Franz's htmlthumbnail
perl Unix script, after modifying it according to his suggestions to produce
GIF rather than JPEG (larger files but sharper edges in drawings).
Some information on gemstones was obtained from
various WWW sources, and especially John Miller's
to whom we are particularly indepted for the delightful word
The section on layered materials and clay minerals was corrected by
Dr Dewey Moore, Senior Clay Mineralogist with the Illinois State Geological Survey,
to whom we are indepted for his many suggestions. See Moore, D.M. and Reynolds,
R.C. Jr. X-ray Diffraction and the Identification and Analysis of Clay Minerals,
2nd Ed., Oxford University Press (1997).
Other sources on the WWW are referenced as appropriate in the text.
For further WWW reading, please see the following:
ICSD-for-WWW Inorganic Crystal Structure Database.
ILL's database of
VRML superconductor structures.
ILL's database of
VRML zeolite structures.
The International Zeolite Association's
Virtual Chemistry pages at Imperial College.
VRML in Chemistry at Darmstadt.
Armel le Bail's review of
VRML in crystallography.
Steven Heyes' lectures on
inorganic solids at Oxford University.
virtual chemistry laboratory at Oxford University.
The Mineralogical Society of America
database of mineral structures.
high pressure mineral structures.
mineral structures at the University of Colorado.
mineralogy home pages at Bristol University.
phyllosilicates (clay) pages.
Garrison Sposito's Molecular Simulations of
Hydrated Montmorillonite Interlayers.
Now return to the Index .
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