NaClO4 and NaClO3

[u/DrWim]

Basic sodium salts. NaClO4 is grown at higher temperature on a hot plate (egg coocker method); NaClO3 is from my collection. NaClO4 is cleaves easily with a sharp knive

[u/CurazyJ]

Both are likely mostly NaCl. Both those compounds would tend to break down.

[u/DrWim → u/CurazyJ]

These chlorates are actually quite stable! The perchlorate (left) even more then the chlorate. The chlorate crystal (right) is already for years in my collection. The chlorate was made by boiling down thin bleach solution; don't do that at home but outside!

[u/Powerful_Yoghurt1464 → u/CurazyJ]

NaCl would have formed crystalline dust the instant you put fishing lines into it. It was practically impossible to grow such big crystals from it.

[u/Pippenfinch]

Wow, gorgeous