- Jul 27, 2023
- Oct 13, 2017
- Johannsenite
- IMA Ideal Chemistry changed from "CaMn2+Si2O6" to "CaMnSi2O6"
- Oct 29, 2015
- May 24, 2007
- Johannsenite
- RRUFF Ideal Chemistry changed from "Ca(Mn2+,Fe2+)Si2O6" to "CaMn2+Si2O6"
- Apr 18, 2007
- Johannsenite
- IMA Ideal Chemistry changed from "Ca(Mn2+,Fe2+)Si2O6" to "CaMn2+Si2O6"
- Jun 29, 2006
- Johannsenite
- IMA Ideal Chemistry changed to "Ca(Mn2+,Fe2+)Si2O6"
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