Protactinium(V) chloride

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What Wikipedia says

Protactinium(V) chloride is the chemical compound composed of protactinium and chlorine with the formula PaCl5. It forms yellow monoclinic crystals and has a unique structure composed of chains of 7 coordinate pentagonal bipyramids which share their edges.

Excerpt from the Wikipedia article “Protactinium(V) chloride”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

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