Delvauxite

minerals

phosphate

diadochite

vivianite

Formula: CaFe3+4(PO4)2(OH)8.4-5H2O
Hydrated phosphate containing hydroxyl
Specific gravity: 1.85
Hardness: 2½
Streak: Yellow, pale brown
Colour: Yellowish brown, brownish black, reddish, chestnut-brown
Environments

Gossan

Associated minerals include diadochite, vivianite, pitticite, melanterite and limonite (HOM).

The type locality is the Château de Berneau, Dalhem, Liège, Wallonia, Belgium.

Back to Minerals