Akermanite

General Information: Chemical Formula:Ca2MgSi2O7 Composition:(Molecular Weight = 272.63 gm)Calcium 29.40 % CaMagnesium 8.92 % MgSilicon 20.60 % SiOxygen 41.08 % O  Empirical Formula: Ca2Mg(Si2O7) Environment:Calcium end-member of the melilite series. Found only in metallurgical slags. Locality:TL: Sweden, unspecified localityPhysical Properties: Cleavage:[001] Distinct, [110] Indistinct Color:colorless, grayish, green, or brown. Density:2.944 Diaphaniety:Transparent to Translucent Hardness:5-6 - Between Apatite and Orthoclase Luster:Vitreous - Resinous Streak:whiteMore details...