Souzalite

General Information: Chemical Formula:(Mg,Fe++)3(Al,Fe+++)4(PO4)4(OH)6·2(H2O) Composition:(Molecular Weight = 729.00 gm)Magnesium 8.33 % MgAluminum 12.95 % AlIron 7.66 % FePhosphorus 17.00 % P Hydrogen 1.38 % H Oxygen 52.67 % O  Empirical Formula: Mg2.5Fe2+0.5Al3.5Fe3+0.5(PO4)4(OH)6·2(H2O) Environment:Forms a series with gormanite. Locality:Linopolis district, N of Dimino das Laranjeiras, Minas Gerias, Brazil. Name Origin:Named for J. A. De Souza (1896-1961), director of Departamento Nacional de Producao Minera, Brazil.Physical Properties: Cleavage:[001] Indistinct, [1] Fair Color:blue green or dark green. Density:3.087 Diaphaniety:Translucent Habits:Crystalline - Coarse - Occurs as well-formed coarse sized crystals., Massive - Fibrous - Distinctly fibrous fine-grained forms., Hardness:5.5-6 - Knife Blade-Orthoclase Luster:Vitreous (Glassy) Streak:whiteMore details...

(Mg,Fe)3(Al,Fe)4(PO4)4(OH)6 2(H2O)