User talk:Bor75

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MediaWiki message delivery (talk) 14:15, 24 November 2015 (UTC)

D cells in Hexagonal
See  (International Tables Volume A fifth/2002 edition) page 73 and .--Officer781 (talk) 05:58, 29 July 2016 (UTC)
 * Meanwhile, would need an opinion for a merger discussion here. Thank you!--Officer781 (talk) 06:08, 29 July 2016 (UTC)
 * Thank you. Very interesting. Never heard about it. However, in my opinion, it should be removed from the list of lattices, because it just confuses people. Nobody uses it now, unlike R cell. If you want, let's mention about it (as well as H-lattice) in text in some historical subsection or subsection about non-standard settings. Bor75 (talk) 06:32, 29 July 2016 (UTC)
 * I've removed the mention of D from all articles except the Bravais lattice and the Hexagonal crystal system articles. I feel those articles should mention this to show the close affinity of hexagonal and rhombohedral lattices. In the hexagonal crystal system article, I edited it to mention that the rhombohedral D-cell is rarely used, but is analogous to the hexagonal R-cell. Hmm. The subsection could be put into the hexagonal crystal system article, with two subsections "D-centred" and "H-centred". There is also an H-cell for the 2D hexagonal lattice, which is on page 4 of International Tables.--Officer781 (talk) 09:36, 29 July 2016 (UTC)
 * I'm kind of reluctant to include the H-cell though, because unlike the D-cell which has its analogy in the R-cell, the H-cell is more of a "triangular base centering" analogous to the base-centering of a tetragonal which would yield the primitive by the same logic of choosing a smaller equilateral triangle (see ).--Officer781 (talk) 10:51, 29 July 2016 (UTC)