> PS: I vote for that "structure factor amplitude" be used in text books > and |F| on cell phones. Student of 2015: "You mean 'abs-F' is really > pronounced 'structure factor amplitude'? I didn't know that!"
By 2015, it would probably be some less-comprehensible variant of instant-messenging contractions and lolcat speak, more like "U mn 'abs-F' z rl'y s'd 'structure factor amplitude'?" I'd also vote for "structure factor amplitude", but if we're going by PDB/RCSB usage it appears to be just "structure factor".