Beautiful, fascinating and very simple to prepare: salt crystals.
Let 's a drop of salt water evaporate on a slide.
Depending on the temperature and the concentration of salt, you get crystals that are more or less different:
- crystals in the shape of arrows (high temperature and fast crystallization),
- or pyramid-shaped (lower temperature and slower crystallization).
Here : 1 and 2 small pyramids not completely formed, 3 and 4 better formed.
Regards
Salt (NaCl) - I
Moderators: rjlittlefield, ChrisR, Chris S., Pau
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Re: Salt (NaCl) - I
Nice images - however, are the 'pyramids' really hopper shaped? Salt usually forms cubes, rarely octahedrons, but hopper-shaped crystals in which the cube faces are not fully developed, leaving behind symmetric hopper-like depressions, are fairly common in halite crystals.
It's not what you look at that matters, it's what you see - Henry David Thoreau
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- Posts: 40
- Joined: Sat Nov 21, 2020 1:48 pm
- Location: Bailly Near Versailles
Re: Salt (NaCl) - I
From what I have seen: often the center of the pyramid is collapsed.
This is true even if the water is allowed to evaporate upside down.
See more on this subject in my next post : Salt (NaCl - II)
Regards
This is true even if the water is allowed to evaporate upside down.
See more on this subject in my next post : Salt (NaCl - II)
Regards