The rare mineral adelite, is a calcium, magnesium, arsenate with chemical formula CaMgAsO4OH.
It forms a solid solution series with the vanadium-bearing mineral gottlobite.
It has a Mohs hardness rating of 5 and a specific gravity of 3.73 to 3.79.
Adelite has been found in ore deposits in Algeria, Germany, Italy, Sweden and the US.
This article about a specific mineral or mineraloid is a stub.