Form: powder pH: 7.2 Hardness (MOHS): 6 Softening Point: 900C Specific Gravity: 2.4 Water Solubility: minimual, 0.15% water soluble substances Reactivity: inert Radioactivity: none GE Brightness: 84 Loss on Ignition: 5% Typical Chemical Analysis: Silicon DioxideAluminum OxideFerric OxideFerrous Ox...