- Jul 28, 2023
- Steacyite
- IMA Number changed from "IMA1981-E" to "IMA1981 s.p."
- Sep 6, 2020
- Steacyite
- RRUFF Ideal Chemistry changed from "K0.3(Na,Ca)2ThSi8O20" to "K0.3(Na,Ca)2Th4+Si8O20"
- Oct 21, 2012
- May 19, 2006
- Steacyite
- IMA Ideal Chemistry changed to "K0.3(Na,Ca)2ThSi8O20"
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