Copper-Magnesium Schoenite

A mixed compound, solid solution of 2 different Tutton's salts: potassium-copper and potassium-magnesium. Approximate formula: K₂(Mg_0.5Cu_0.5)(SO₄)₂·6H₂O

Properties

• Crystal system: monoclinic
• Crystal shape: flat slant prisms with rhombic base, very different from the shape of pure schoenite.
• Color: light blue, much lighter than copper sulfate
• Stability on air: stable

Preparation

Mix K₂Cu(SO₄)₂·6H₂O and K₂Mg(SO₄)₂·6H₂O approximately in 1:1 ratio, dissolve in water and crystallize.

Safety

Mildly toxic as all copper compounds

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