- Sep 3, 2023
- Trimounsite-(Y)
- RRUFF Ideal Chemistry changed from "Y3+2Ti4+2O5SiO4" to "Y2Ti4+2SiO9"
- Mineral Comment changed from to
- Oct 13, 2017
- Trimounsite-(Y)
- IMA Ideal Chemistry changed from "Y2Ti2O5SiO4" to "Y2Ti2SiO9"
- Aug 2, 2014
- Trimounsite-(Y)
- RRUFF Ideal Chemistry changed from "Y2Ti2O5SiO4" to "Y3+2Ti4+2O5SiO4"
- Oct 6, 2012
- May 25, 2008
- Jun 3, 2007
- Trimounsite-(Y)
- RRUFF Ideal Chemistry changed from "(Y,Dy,Er,Yb)2Ti2O5SiO4" to "Y2Ti2O5SiO4"
- Apr 13, 2007
- Trimounsite-(Y)
- IMA Ideal Chemistry changed from "(Y,Dy,Er,Yb)2Ti2O5SiO4" to "Y2Ti2O5SiO4"
- May 20, 2006
- Trimounsite-(Y)
- RRUFF Ideal Chemistry changed from "(Y,REE)2Ti2SiO9" to "(Y,Dy,Er,Yb)2Ti2O5SiO4"
- IMA Ideal Chemistry changed to "(Y,Dy,Er,Yb)2Ti2O5SiO4"
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