View changes made in:
  • Jul 27, 2023
    • Hellandite-(Y)
      • IMA Number changed from "IMA2000-F, IMA2002 s.p." to "IMA2002 s.p."
  • Jul 12, 2022
    • Hellandite-(Y)
      • IMA Number changed from "IMA2000-F" to "IMA2000-F, IMA2002 s.p."
  • May 3, 2022
    • Hellandite-(Y)
      • Mineral Comment changed from

        Brøgger W C (1903) Über den hellandit, ein neues mineral, Nyt Magazin for Naturvidenskabena 41, 213-221

        Name changed from hellandite:
        Nickel E H, Mandarino J A (1987) Procedures involving the IMA Commission on New Minerals and Mineral Names and guidelines on mineral nomenclature, American Mineralogist 72, 1031-1042

        Chemical formula redefined:
        Oberti R, Ventura G D, Ottolini L, Hawthorne F C, Bonazzi P (2002) Re-definition, nomenclature, and crystal-chemistry of the hellandite group, American Mineralogist 87, 745-752

        to

        Brøgger W C (1903) Über den Hellandit, ein neues Mineral. Nyt Magazin for Naturvidenskabena 41, 213-221

        Name changed from hellandite:
        Nickel E H, Mandarino J A (1987) Procedures involving the IMA Commission on New Minerals and Mineral Names and guidelines on mineral nomenclature, American Mineralogist 72, 1031-1042

        Chemical formula redefined:
        Oberti R, Ventura G D, Ottolini L, Hawthorne F C, Bonazzi P (2002) Re-definition, nomenclature, and crystal-chemistry of the hellandite group, American Mineralogist 87, 745-752

  • Jun 10, 2017
    • Hellandite-(Y)
      • RRUFF Ideal Chemistry changed from "(Ca,REE)4Y2Al(Be,Li)2-xB4Si4O22(OH)2" to "(Ca,REE)4Y2Al   2(B4Si4O22)(OH)2"
      • IMA Ideal Chemistry changed from "(Ca,REE)4Y2Al(Be,Li)2-xB4Si4O22(OH)2" to "(Ca,REE)4Y2Al   2(B4Si4O22)(OH)2"
  • Sep 13, 2015
    • Hellandite-(Y)
      • RRUFF Ideal Chemistry changed from "(Ca3Y)Y2Al(B4Si4O22)(OH)2" to "(Ca,REE)4Y2Al(Be,Li)2-xB4Si4O22(OH)2"
      • IMA Ideal Chemistry changed from "(Ca3Y)Y2Al(B4Si4O22)(OH)2" to "(Ca,REE)4Y2Al(Be,Li)2-xB4Si4O22(OH)2"
  • Sep 6, 2013
    • Hellandite-(Y)
      • RRUFF Ideal Chemistry changed from "(Ca3Y)Y2AlB4Si4O22(OH)2" to "(Ca3Y)Y2Al(B4Si4O22)(OH)2"
      • IMA Ideal Chemistry changed from "(Ca3Y)Y2AlB4Si4O22(OH)2" to "(Ca3Y)Y2Al(B4Si4O22)(OH)2"
  • Oct 14, 2009
    • Hellandite-(Y)
      • Mineral Comment changed from

        Name changed from hellandite:
        Nickel E H, Mandarino J A (1987) Procedures involving the IMA Commission on New Minerals and Mineral Names and guidelines on mineral nomenclature, American Mineralogist 72, 1031-1042

        Chemical formula redefined:
        Oberti R, Ventura G D, Ottolini L, Hawthorne F C, Bonazzi P (2002) Re-definition, nomenclature, and crystal-chemistry of the hellandite group, American Mineralogist 87, 745-752

        to

        Brøgger W C (1903) Über den hellandit, ein neues mineral, Nyt Magazin for Naturvidenskabena 41, 213-221

        Name changed from hellandite:
        Nickel E H, Mandarino J A (1987) Procedures involving the IMA Commission on New Minerals and Mineral Names and guidelines on mineral nomenclature, American Mineralogist 72, 1031-1042

        Chemical formula redefined:
        Oberti R, Ventura G D, Ottolini L, Hawthorne F C, Bonazzi P (2002) Re-definition, nomenclature, and crystal-chemistry of the hellandite group, American Mineralogist 87, 745-752

  • Nov 11, 2008
    • Hellandite-(Y)
      • RRUFF Ideal Chemistry changed from "(Ca,Y)4(Y,Ca)2(Al,Fe3+)B4Si4O22(OH)2" to "(Ca3Y)Y2AlB4Si4O22(OH)2"
      • IMA Ideal Chemistry changed from "(Ca,Y)4(Y,Ca)2(Al,Fe3+)B4Si4O22(OH)2" to "(Ca3Y)Y2AlB4Si4O22(OH)2"
      • Mineral Comment changed from

        Name changed from hellandite:
        Nickel E H, Mandarino J A (1987) Procedures involving the IMA Commission on New Minerals and Mineral Names and guidelines on mineral nomenclature, American Mineralogist 72, 1031-1042

        to

        Name changed from hellandite:
        Nickel E H, Mandarino J A (1987) Procedures involving the IMA Commission on New Minerals and Mineral Names and guidelines on mineral nomenclature, American Mineralogist 72, 1031-1042

        Chemical formula redefined:
        Oberti R, Ventura G D, Ottolini L, Hawthorne F C, Bonazzi P (2002) Re-definition, nomenclature, and crystal-chemistry of the hellandite group, American Mineralogist 87, 745-752

  • Jun 29, 2006
    • Hellandite-(Y)
      • IMA Ideal Chemistry changed to "(Ca,Y)4(Y,Ca)2(Al,Fe3+)B4Si4O22(OH)2"