Zinc oxide General Other names Zinc white, calamine Molecular formula ZnO Molar mass 81.41 g/mol Appearance White solid Crystal Structure cubic CAS number [1314-13-2][1] Properties Density and phase 5.606 g/cm3, solid Solubility in water Insoluble Melting point 1975°C (decomposes) Boiling point Mohs hardness 5 a Lattice constant 4.63Å Thermodynamic data Standard enthalpy of formation ΔfH°solid −348.0 kJ/mol Standard molar entropy S°solid 43.9 J. ...
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