Garyansellite

General Information: Chemical Formula:(Mg,Fe+++)3(PO4)2(OH,O)·1,5(H2O) Composition:(Molecular Weight = 330.29 gm)Magnesium 16.56 % MgIron 12.68 % FePhosphorus 18.76 % P Hydrogen 1.14 % H Oxygen 50.86 % O  Empirical Formula: 3(Mg0.75)3(Fe3+0.25)(PO4)2(OH)0.75O0.25·1.5(H2O) IMA Status:Approved IMAPhysical Properties: Cleavage:[001] Good Color:brown. Density:3.16 Diaphaniety:Translucent Hardness:4 - Fluorite Luster:Vitreous (Glassy) Streak:brownMore details...

(Mg,Fe)3(PO4)2(OH,O) 1.5(H2O)