- Oct 13, 2017
- Bettertonite
- IMA Ideal Chemistry changed from "Al6(AsO4)3(OH)9·16H2O" to "Al6(AsO4)3(OH)9(H2O)5·11H2O"
- Feb 25, 2016
- Sep 19, 2015
- Bettertonite
- RRUFF Ideal Chemistry changed from "Al6(AsO4)3(OH)9·16H2O" to "Al6(As5+O4)3(OH)9·16H2O"
- Apr 10, 2015
- Bettertonite
- New Mineral Entry
- Mineral Display Name changed to "Bettertonite"
- RRUFF Ideal Chemistry changed to "Al6(AsO4)3(OH)9·16H2O"
- IMA Ideal Chemistry changed to "Al6(AsO4)3(OH)9·16H2O"
- IMA Number changed to "IMA2014-074"
- Mineral Comment changed to
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