Wagnerite is a mineral, a combined phosphate and fluoride of iron and magnesium, with the formula (MgFe)2PO4F. It occurs in pegmatite associated with other phosphate minerals. It is named after F.M. von Wagner (1768-1851), a German mining official. ... Found on http://en.wikipedia.org/wiki/Wagnerite
Wag'ner·ite noun (Min.) A fluophosphate of magnesia, occurring in yellowish crystals, and also in massive forms. Found on http://www.encyclo.co.uk/webster/W/2