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For anyone wondering, this occurs because of the chemical bond geometry of the salt. Since the surface is exposed to the same concentration of salt the cube grows symmetrically. “Those look like lattice defects caused by impurities. Potassium chloride, sodium bromide, that sort of thing. It disrupts the flow, but not enough to significantly weaken the lattice energy.” Crystal structure. You can have different shapes, but also different structures of those shapes. So for instance, crystals can form as a cube, but there can be body centred cube, meaning that there are the 8 normal corners and one in the very centre (9 atoms total). Or face centred, meaning that there is an atom in the centre of each face (14 atoms total). This can also affect material density. - See more at: www.wajlol.com...
originally posted by: rickymouse
I think there is quite a bit of bromide in dead sea salt. That is why people use it for baths, it relaxes people.
Now I wonder if that would also effect the shape somewhat or whether the crystals formed are actually void of this ion.
originally posted by: Philippines
It is probably a salt, yes, but nothing you would want to eat or taste.
Even when swimming in the dead sea you have to be careful not to get your eyes wet with the stuff. It's something like an oily water unlike anywhere else