antipinite
{{Infobox mineral
| name = Antipinite
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| image = File:Antipinite.jpg
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| caption = Rare antipinite crystals
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| category = Oxalate minerals
| formula = {{chem2|KNa3Cu2(C2O4)4}}
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| strunz = 10.00.
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| color = Blue
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| gravity = 2.53
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Antipinite (IMA symbol: Atp) is a rare alkali Copper oxalate mineral with the chemical formula {{chem2|KNa3Cu2(C2O4)4}}. Its type locality is the Tarapacá Region in Chile.[https://mindat.org/min-46162.html Antipinite] {{Webarchive|url=https://web.archive.org/web/20190406020310/https://www.mindat.org/min-46162.html |date=2019-04-06 }} on mindat.org