Well crystallized forms are referred to as destinezite, which has been given official recognition by the International Mineralogical Association with diadochite being the poorly formed to amorphous variety.

[2][3] It has a greenish yellow to brown colour and forms nodules or crusts.

Identified originally in Belgium in 1831, it has been found in many places throughout the world.

It occurs as a secondary mineral in mineral gossans, coal deposits, phosphate rich pegmatites and cave guano deposits.

[4] This article about a specific phosphate mineral is a stub.