gallium crystals


Physical Properties of Gallium: Ga

Gallium does not crystallize in any of the simple crystal structures. The stable phase under normal conditions isorthorhombic with 8 atoms in the conventional unit cell. Within a unit cell, each atom has only one nearest neighbor (at a distance of 244 pm). The remaining six unit cell neighbors are spaced 27, 30 and 39 pm farther away, and they are grouped in pairs with the same distance. Many stable and metastable phases are found as function of temperature and pressure.

The bonding between the two nearest neighbors is covalent, hence Ga2 dimers are seen as the fundamental building blocks of the crystal. This explains the drop of the melting point compared to its neighbor elements aluminium and indium.

The physical properties of gallium are highly anisotropic, i.e. have different values along the three major crystallographical axes a, b, and c (see table); for this reason, there is a significant difference between the linear (α) and volume thermal expansion coefficients. The properties of gallium are also strongly temperature-dependent, especially near the melting point. For example, the thermal expansion coefficient increases by several hundred percent upon melting. (x)

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chronicslacker-deactivated20160  asked:

I was wondering if you know about any good grow your own crystal kits? Or something similar. Thank you! :)

All the kits I’ve done seemed pretty lackluster compared to the packaging so I don’t think much of them. I’ve had lots of success with blueing, sugarwater, saltwater, and even borax recently. I’ve seen lots of pretty alum tetrahedrons and copper sulfate(tree root killer) will crystallize quite nicely(it’s harmless if you don’t lick it). The steps for these (and many more) are pretty much all the same for anything crystalline that dissolves in water so don’t worry about it. If you’re ambitious you can try making gallium and bismuth crystals on the stove(wear gloves and stuff because I did get some to splatter upon introducing a water inclusion). If you know some chemistry you can get into making all kinds of things like that Potassium ferrioxalate I posted last month(instructions are in that thread somewhere) or sulfur.

There are tons of options if you’re willing.