A note on crystallographic calculations

Max H. Hey
1940 Mineralogical Magazine and Journal of the Mineralogical Society  
In the course of work on the Barker index of determinative crystallography, a number of interesting problems have arisen owing to the selection by a few workers of unusual sets of fundamental angles for their computations. Most of these problems have been of no general application, but One appears to have a wider interest and may prove of practical value in dealing with crystals having curved or striated faces that only admit of accurate measurements along one zone. This problem was to compute
more » ... he angles and elements of a monoclinic crystal, using as fundamentals the angles from b(010) to any three faces e, f, g (of known indices) not in the zone [010], and no pair of which are co-zonal with b(fig. 1).
doi:10.1180/minmag.1940.025.169.03 fatcat:m3yjxpgmefgbnmi2oyrz7niq2m