Topography

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A Brief History of X-Ray Diffraction Topography

The Synchrotron Topography Story - A chronology

The "missing piece" of polytype identification

Methods of Analysis

The Key to the Polytype Models

Distribution of data by size

Station 7.6 Experimental geometry Topography Resolution conventional setup with c-axis perpendicular to beam direction

Schematic diagram edge geometry           STANDARD EDGE INDEXING

Data Files

4H polytype

6H polytype

15R polytype

c-axis along beam direction NEW geometry:

Data Files (6H Polytype) 15 degrees 30 degrees 45 degrees

"The non-degenerate sandwich classification scheme has become the KFB morphological model of polytype coalescence in silicon carbide."

Links

Daresbury Laboratory from Keckwick Lane

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