Eu₂(PO₃H)₃

The structure of Eu₂(PO₃H)₃ contains three independent phosphite anions. One Eu³⁺ cation is eight-coordinate whereas the other is only seven-coordinate. EuO₈ dodecahedra and EuO₇ monocapped trigonal prisms share corners to form infinite layers parallel to the [101] direction.

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