scholarly journals Circle Geometry

2006 ◽  
pp. 55-70
Keyword(s):  
1994 ◽  
Vol 27 (5) ◽  
pp. 845-846 ◽  
Author(s):  
R. B. Neder

An inaccuracy in the GRIDSCAN procedure, included in version 5.1 of CAD-4-EXPRESS, is pointed out. The program presented allows interactive and batch-type scans on a true grid in reciprocal-lattice units. Two measurement modes are provided: (i) calculation of all points at general Eulerian angles with fixed ψ for all reflections; (ii) two-circle geometry by definition of a zone axis.


2019 ◽  
Vol 14 (4) ◽  
pp. 7404-7413
Author(s):  
Terhemen Moses Ityavzua ◽  
Theresa O. Ofoegbu ◽  
Abdullahi Muhammad ◽  
Nguuma Jimin

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