Crystal Growing Collection

Crystals

Sulfates

Potassium sulfate Copper Sulfate Triglycine Sulfate Hexakis(carbamide) Zinc Sulfate

Salts of sulfuric acid H2SO4. Sulfates are generally a good material for growing crystals, because of their stability and solubility.

Sulfuric acid also forms salts or adducts with some organic compounds and complex ions.

Double sulfates: Tutton's salts

There are many sulfates that have 2 different metals in it, in stoichiometric proportion. They form several families of similar compounds. Tutton's salts are compounds of general formula: MI2MII(SO4)2·6H2O, where MI and MII stand for univalent and bivalent anions. In mineralogy, they are called schoenites.

Double sulfates: bloedite family

Bloedites are similar to Tutton's salts (schoenites), but have 4 molecules of water instead of 6. They also can include Na ions.

Double sulfates: alums

Alums are the family of similar double sulfates of general formula: MIMIII(SO4)2·12H2O, where MI and MIII stand for univalent and trivalent anions. MI is usually one of K, NH4 but can be other: Na, Rb, Tl. Trivalent metal MIII is usually one of Al3+, Fe3+, Cr3+.

Phosphates

Salts of phosphoric acid H3PO4.

Acetates

Salts of acetic acid. Most acetates are soluble, but few of them are suitable for growing nice crystals.

Nitrates

Salts of nitric acids HNO3. Most of nitrates are extremely soluble in water and deliquescent, which makes them badly suited for growing.

Chlorides

Oxalate complexes

Alumooxalates

Ferrioxalates

Ferrioxalates have beautiful green color, unusual for iron (III) compounds. THey are slightly light sensitive.

Organic

Other