- May 10, 2021
- Pigeonite
- IMA Number changed to "IMA1988 s.p."
- Oct 13, 2017
- Pigeonite
- IMA Ideal Chemistry changed from "(Mg,Fe,Ca)SiO3" to "(Mg,Fe,Ca)2Si2O6"
- May 18, 2014
- Pigeonite
- RRUFF Ideal Chemistry changed from "(Mg,Fe,Ca)SiO3" to "(Mg,Fe2+,Ca)SiO3"
- Jul 10, 2010
- May 10, 2006
- Pigeonite
- IMA Ideal Chemistry changed to "(Mg,Fe,Ca)SiO3"
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