Faheyite

General Information:
 Chemical Formula:
(Mn,Mg)Fe+++2Be2(PO4)4·6(H2O)
 Composition:
(Molecular Weight = 664.98 gm)
Magnesium 0.91 % Mg
Manganese 6.20 % Mn
Beryllium 2.71 % Be
Iron 16.80 % Fe
Phosphorus 18.63 % P 
Hydrogen 1.82 % H 
Oxygen 52.93 % O 
 Empirical Formula:
Mn2+0.75Mg0.25Fe3+2Be2(PO4)4·6(H2O)
Physical Properties:
 Cleavage:
[???] Perfect
 Color:
blue white, brownish white, or white.
 Density:
2.66
 Streak:
white
More details...