Ammonium tetrachlorocuprate

Formula: (NH₄)₂[CuCl₄]

Blue crystals, obtained when ammonium chloride NH₄Cl is crystallized together with copper(II) chloride CuCl₂.

Properties

• Crystal shape: distorted rhombododecahedrons, octahedrons
• Color: greenish-blue, teal. Less blue than copper sulfate
• Stability on air: stable

Preparation

To prepare ammonium tetrachlorocuprate, dissolve ammonium and copper chlorides in water, in 2:1 molar ration, then crystallize the solution. Reaction equation is:

2NH₄Cl + CuCl₂ = (NH₄)₂[CuCl₄]

Safety

All copper compounds are moderately toxic.

More photos

References