Hmm, yes, thanks. I know it as basically crystallographic lore from long ago, as in email sigs, but the only source I could find now is http://www.some.ox.ac.u

Hmm, yes, thanks. I know it as basically crystallographic lore from long ago, as in email sigs, but the only source I could find now is http://www.some.ox.ac.uk/wp-content/uploads/2015/08/Dorothy-Hodgkin-booklet.pdf http://www.some.ox.ac.uk/wp-content/uploads/2015/08/Dorothy-... I now find another familiar name from the past quoting the "modestly" version which I should use in future: https://sites.google.com/site/oxfordawisehome/elspeth-garman https://sites.google.com/site/oxfordawisehome/elspeth-garman