- Sep 7, 2023
- Tweddillite
- IMA Ideal Chemistry changed from "CaSr(Mn3+2Al)[Si2O7][SiO4]O(OH)" to "CaSrMn3+2Al(Si2O7)(SiO4)O(OH)"
- Oct 13, 2017
- Tweddillite
- IMA Ideal Chemistry changed from "CaSrMn3+2Al(Si2O7)(SiO4)O(OH)" to "CaSr(Mn3+2Al)[Si2O7][SiO4]O(OH)"
- Sep 15, 2016
- Sep 27, 2015
- Tweddillite
- Mineral Display Name changed from "Manganipiemontite-(Sr)" to "Tweddillite"
- Mineral Comment changed from to
- Mar 20, 2010
- Mar 16, 2008
- Tweddillite
- RRUFF Ideal Chemistry changed from "CaSr(Mn3+2Al)[Si2O7][SiO4]O(OH)" to "CaSrMn3+2Al(Si2O7)(SiO4)O(OH)"
- IMA Ideal Chemistry changed from "CaSr(Mn3+2Al)[Si2O7][SiO4]O(OH)" to "CaSrMn3+2Al(Si2O7)(SiO4)O(OH)"
- Sep 4, 2007
- May 9, 2007
- Mar 29, 2007
- Tweddillite
- New Mineral Entry
- Mineral Display Name changed to "Tweddillite"
- RRUFF Ideal Chemistry changed to "CaSrMn3+2Al(Si2O7)(SiO4)O(OH)"
- IMA Ideal Chemistry changed to "CaSrMn3+2Al(Si2O7)(SiO4)O(OH)"
- Dec 14, 2006
- Tweddillite
- RRUFF Ideal Chemistry changed from "CaSr(Mn3+,Fe3+)2Al(Si2O7)(SiO4)O(OH)" to "CaSr(Mn3+2Al)[Si2O7][SiO4]O(OH)"
- IMA Ideal Chemistry changed from "CaSr(Mn3+,Fe3+)2Al(Si2O7)(SiO4)O(OH)" to "CaSr(Mn3+2Al)[Si2O7][SiO4]O(OH)"
- Oct 5, 2006
- Tweddillite
- Mineral Display Name changed from "Tweddillite" to "Manganipiemontite-(Sr)"
- May 25, 2006
- Tweddillite
- IMA Ideal Chemistry changed to "CaSr(Mn3+,Fe3+)2Al(Si2O7)(SiO4)O(OH)"
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