Raadeite
Raadeite is an IMA-recognized mineral species in the phosphate class, with the chemical formula Mg₇(PO₄)₂(OH)₈.
It crystallizes in the monoclinic crystal system (space group P2_1/n). It is a member of the Allactite structural group.
Key properties: specific gravity 2.806; White streak; Pearly luster; optically biaxial.
IMA symbol Raa, IMA status: approved, named in 1996.
Late metamorphic, under relatively low pressure and temperature, in nodules rich in apatite and Mg phosphates within a serpentinite body.
It is found associated with Apatite, althausite, magnesite, holtedahlite, phosphoellenbergerite.
The mineral was named to honor Dr. Gunnar Raade, Curator of Minerals, Natural History Museum, Oslo, Norway for his contribution to the mineralogy of Mg-phosphates.