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Created: 2023-05-15T22:13:00.0000000
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In chemistry, a dihydrate is a compound that contains two molecules of water per molecule of the compound. The water molecules are usually tightly bound to the compound and are not easily removed. For example, iron(II) oxalate dihydrate (FeC2O4·2H2O) is a coordination polymer consisting of chains of oxalate-bridged ferrous centers, each with two aquo ligands¹.

I hope that helps. Let me know if you have any other questions.

Source: Conversation with Bing, 5/15/2023
(1) Iron(II) oxalate - Wikipedia. <https://en.wikipedia.org/wiki/Iron%28II%29_oxalate>.
(2) Hydrate - Wikipedia. <https://en.wikipedia.org/wiki/Hydrate>.
(3) Hydrate Description, Formation, & Examples Britannica. <https://www.britannica.com/science/hydrate>.
(4) 10.11: Percent of Water in a Hydrate - Chemistry LibreTexts. <https://chem.libretexts.org/Bookshelves/Introductory_Chemistry/Book%3A_Introductory_Chemistry_%28CK-12%29/10%3A_The_Mole/10.10%3A_Percent_of_Water_in_a_Hydrate>.