Sodium halides

Sodium chloride NaCl is cubic.

This large crystal of NaCl is standing in front of a model of sodium chloride.

Sodium bromide NaBr forms hexagons!

And sodium iodide forms pale yellow spikes seen here in a watch glass.

I’m not sure why the sodium iodide is pale yellow, presumably due to the presence of some iodine.

What would you predict about crystals of the lithium halides; lithium chloride LiCl, lithium bromide LiBr and lithium iodide LiI?

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