Manganese(II) Iodide (MnI₂) is a white crystalline solid with a hexagonal crystal structure. Its molar mass of 340.76 g/mol and density of 4.45 g/cm³ contribute to its physical properties. MnI₂ exhibits antiferromagnetism due to unpaired electrons in Mn(II) ions. With a melting point of 650 °C and a boiling point of 1220 °C, it undergoes solid-to-liquid and liquid-to-gas phase transitions at these temperatures. MnI₂ is soluble in water, forming aqueous solutions.