Thorium heptaphosphide is a binary inorganic compound of thorium metal and phosphorus with the chemical formula . This is the most phosphorus-rich binary compound of a tetravalent thorium.
Synthesis Thorium heptaphosphide can be synthesized from the elements with addition of iodine at 830 K.
Properties Thorium heptaphosphide forms black rod-shaped crystals of orthorhombic crystal system. It decomposes to at 650 K in vacuo.
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