MnF2

MnF2, manganese(II) fluoride, is an inorganic compound with the formula MnF2. It is a white to pale pink crystalline solid that is sparingly soluble in water. MnF2 crystallizes in the rutile-type tetragonal structure, with Mn2+ centers octahedrally coordinated by six fluoride ions; each fluoride typically links two Mn centers, forming a three-dimensional network.

Magnetic properties arise from Mn2+, which has five unpaired electrons. MnF2 is an antiferromagnet with a Néel temperature of about 68 K, becoming paramagnetic at room temperature. The compound is chemically stable under ambient conditions but should be handled as a fluoride salt, with standard precautions to avoid inhalation or ingestion of dust or solutions.

Preparation of MnF2 is commonly achieved by fluorinating manganese oxides or manganese salts with fluorinating agents such as fluorine gas or hydrofluoric acid, followed by purification. It can also be prepared via precipitation from Mn2+ solutions using fluoride sources under controlled conditions.

Applications include serving as a convenient source of Mn2+ for chemical syntheses and as a model material in low-temperature studies of antiferromagnetism and spin dynamics. MnF2 is also used as a starting material for preparing other manganese fluoride phases and related materials.

Safety notes: MnF2 is a fluoride compound and should be handled with appropriate protective equipment to prevent exposure. Fluoride-containing wastes should be disposed of according to applicable regulations.

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