- Crystal system: monoclinic
- Crystal shape: flat, tabular prisms with elongated hexagonal base and slant sides.
- Color: colorless
- Stability on air: stable
I prepared it by reaction of lithium hydroxide and dilute sulfuric acid:
2LiOH + H2SO4 = Li2SO4 + H2O
As always, I used slow evaporation method to grow the crystals. Growing was complicated by very strong tendency of lithium sulfate solution to creep.
It seems that pH affects crystal morphology: alcaline pH produces very thin plates, while from acidic solutions thicker plates grow.
Lithium has low acute toxicity, but consumption of it must be avoided.