The rise and fall of Weber indices
2018 ◽
Vol 51
(4)
◽
pp. 1221-1225
◽
Keyword(s):
Weber indices were introduced to provide a unique expression of a lattice direction with respect to the four-axis setting used for hexagonal and rhombohedral crystals. They are in general fractional indices, even in the case of a primitive hexagonal unit cell, but they are often carelessly reduced to integer values. This corresponds, on the one hand, to taking as direction indices the nodes of a lattice further from the origin and, on the other hand, to adopting a hybrid indexing between direct and reciprocal space. A critical analysis of the drawbacks of Weber indices is presented, which justifies the reluctance of crystallographers to adopt them, despite a more widespread use in fields like electron microscopy and metal science.
2018 ◽
Vol 21
(3)
◽
pp. 103-119
Keyword(s):
Keyword(s):
1984 ◽
Vol 32
(3)
◽
pp. 449-470
◽
Keyword(s):
2021 ◽
Vol 7
(1)
◽
pp. 57-62
Keyword(s):
1980 ◽
Vol 38
◽
pp. 30-33