View changes made in:
  • 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
    • Tweddillite
      • Mineral Comment changed from

        Armbruster T, Gnos E, Dixon R, Gutzmer J, Hejny C, Döbelin N, Medenbach O (2002) Manganvesuvianite and tweddillite, two new Mn3+-silicate minerals, Mineralogical Magazine 66, 137-150

        Name changed from tweddillite to manganipiemontite-(Sr):
        Armbruster T, Bonazzi P, Akasaka M, Bermanec V, Chopin C, Giere R, Huess-Assbichler S, Liebscher A, Menchetti S, Pan Y, Pasero M (2006) Recommended nomeclature of epidote-group minerals, European Journal of Mineralogy 18, 551-567

        Name changed back to tweddillite:
        Hålenius U, Hatert F, Pasero M, Mills S J (2015) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) Newsletter 26. New minerals and nomenclature modifications approved in 2015. Mineralogical Magazine 79, 941-947

        to

        Armbruster T, Gnos E, Dixon R, Gutzmer J, Hejny C, Döbelin N, Medenbach O (2002) Manganvesuvianite and tweddillite, two new Mn3+-silicate minerals, Mineralogical Magazine 66, 137-150

        Name changed from tweddillite to manganipiemontite-(Sr):
        Armbruster T, Bonazzi P, Akasaka M, Bermanec V, Chopin C, Giere R, Huess-Assbichler S, Liebscher A, Menchetti S, Pan Y, Pasero M (2006) Recommended nomeclature of epidote-group minerals, European Journal of Mineralogy 18, 551-567

        Name changed back to tweddillite:
        Revheim O, King V T (2016) Epidote supergroup nomenclature: The names hancockite, niigataite and tweddillite reinstated. Mineralogical Magazine 80, 877-880

  • Sep 27, 2015
    • Tweddillite
      • Mineral Display Name changed from "Manganipiemontite-(Sr)" to "Tweddillite"
      • Mineral Comment changed from

        Original name is tweddillite:
        Armbruster T, Gnos E, Dixon R, Gutzmer J, Hejny C, Döbelin N, Medenbach O (2002) Manganvesuvianite and tweddillite, two new Mn3+-silicate minerals, Mineralogical Magazine 66, 137-150

        Jambor J L, Roberts A C (2003) New mineral names, American Mineralogist 88, 251-255

        Name changed from tweddillite to manganipiemontite-(Sr):
        Armbruster T, Bonazzi P, Akasaka M, Bermanec V, Chopin C, Giere R, Huess-Assbichler S, Liebscher A, Menchetti S, Pan Y, Pasero M (2006) Recommended nomeclature of epidote-group minerals, European Journal of Mineralogy 18, 551-567

        to

        Armbruster T, Gnos E, Dixon R, Gutzmer J, Hejny C, Döbelin N, Medenbach O (2002) Manganvesuvianite and tweddillite, two new Mn3+-silicate minerals, Mineralogical Magazine 66, 137-150

        Name changed from tweddillite to manganipiemontite-(Sr):
        Armbruster T, Bonazzi P, Akasaka M, Bermanec V, Chopin C, Giere R, Huess-Assbichler S, Liebscher A, Menchetti S, Pan Y, Pasero M (2006) Recommended nomeclature of epidote-group minerals, European Journal of Mineralogy 18, 551-567

        Name changed back to tweddillite:
        Hålenius U, Hatert F, Pasero M, Mills S J (2015) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) Newsletter 26. New minerals and nomenclature modifications approved in 2015. Mineralogical Magazine 79, 941-947

  • Mar 20, 2010
    • Tweddillite
      • Mineral Comment changed from

        Original name is tweddillite:
        Armbruster T, Gnos E, Dixon R, Gutzmer J, Hejny C, Döbelin N, Medenbach O (2002) Manganvesuvianite and tweddillite, two new Mn3+-silicate minerals, Mineralogical Magazine 66, 137-150

        Jambor J L, Roberts A C (2003) New mineral names, American Mineralogist 88, 251-255

        Name changed from tweddillite:
        Armbruster T, Bonazzi P, Akasaka M, Bermanec V, Chopin C, Giere R, Huess-Assbichler S, Liebscher A, Menchetti S, Pan Y, Pasero M (2006) Recommended nomeclature of epidote-group minerals, European Journal of Mineralogy 18, 551-567

        to

        Original name is tweddillite:
        Armbruster T, Gnos E, Dixon R, Gutzmer J, Hejny C, Döbelin N, Medenbach O (2002) Manganvesuvianite and tweddillite, two new Mn3+-silicate minerals, Mineralogical Magazine 66, 137-150

        Jambor J L, Roberts A C (2003) New mineral names, American Mineralogist 88, 251-255

        Name changed from tweddillite to manganipiemontite-(Sr):
        Armbruster T, Bonazzi P, Akasaka M, Bermanec V, Chopin C, Giere R, Huess-Assbichler S, Liebscher A, Menchetti S, Pan Y, Pasero M (2006) Recommended nomeclature of epidote-group minerals, European Journal of Mineralogy 18, 551-567

  • 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)"