Sodium metaborate

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What Wikipedia says

Sodium metaborate is a chemical compound of sodium, boron, and oxygen with formula NaBO2. However, the metaborate ion is trimeric in the anhydrous solid, therefore a more correct formula is Na3B3O6 or (Na+)3[B3O6]3−.

Excerpt from the Wikipedia article “Sodium metaborate”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

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