Wagnerite

This page is about a mineral. For the term used for followers of the philosophy of Romantic composer Richard Wagner, or for fans of his compositions, see Wagnerism.Wagnerite is a mineral, a combined phosphate and fluoride of iron and magnesium, formula (MgFe)2.PO4.F. It occurs in Pegmatite associated with other phosphate minerals. It is named after F.M. von Wagner, a German mining official.
See more at Wikipedia.org...

(n.)
A fluophosphate of magnesia, occurring in yellowish crystals, and also in massive forms.
  

General Information:
 Chemical Formula:
(Mg,Fe++)2(PO4)F
 Composition:
(Molecular Weight = 170.47 gm)
Magnesium 24.95 % Mg
Iron 8.19 % Fe
Phosphorus 18.17 % P 
Oxygen 37.54 % O 
Fluorine 11.15 % F 
 Empirical Formula:
Mg1.75Fe2+0.25(PO4)F
Physical Properties:
 Cleavage:
[???] Imperfect
 Color:
greenish, gray white, grayish, yellow, or reddish brown.
 Density:
3.07 - 3.14, Average = 3.1
 Diaphaniety:
Translucent
 Habits:
Massive - Uniformly indistinguishable crystals forming large masses., ,
 Hardness:
5-5.5 - Apatite-Knife Blade
 Luminescence:
Non-fluorescent.
 Luster:
Vitreous (Glassy)
 Streak:
white
More details...