View changes made in:
  • Sep 4, 2023
    • Hellandite-(Ce)
      • RRUFF Ideal Chemistry changed from "(Ca,REE)4Ce2Al   2(B4Si4O22)(OH)2" to "(Ca,REE)4Ce3+2Al   2(B4Si4O22)(OH)2"
  • Jun 10, 2017
    • Hellandite-(Ce)
      • IMA Ideal Chemistry changed from "(Ca,REE)4Ce2Al(Be,Li)2-xB4Si4O22(OH)2" to "(Ca,REE)4Ce2Al   2(B4Si4O22)(OH)2"
      • RRUFF Ideal Chemistry changed from "(Ca,REE)4Ce2Al(Be,Li)2-xB4Si4O22(OH)2" to "(Ca,REE)4Ce2Al   2(B4Si4O22)(OH)2"
  • Sep 13, 2015
    • Hellandite-(Ce)
      • IMA Ideal Chemistry changed from "(Ca3Ce)Ce2Al(B4Si4O22)(OH)2" to "(Ca,REE)4Ce2Al(Be,Li)2-xB4Si4O22(OH)2"
      • RRUFF Ideal Chemistry changed from "(Ca3Ce)Ce2Al(B4Si4O22)(OH)2" to "(Ca,REE)4Ce2Al(Be,Li)2-xB4Si4O22(OH)2"
  • Sep 6, 2013
    • Hellandite-(Ce)
      • RRUFF Ideal Chemistry changed from "(Ca3Ce)Ce2AlB4Si4O22(OH)2" to "(Ca3Ce)Ce2Al(B4Si4O22)(OH)2"
      • IMA Ideal Chemistry changed from "(Ca3Ce)Ce2AlB4Si4O22(OH)2" to "(Ca3Ce)Ce2Al(B4Si4O22)(OH)2"
  • Nov 12, 2008
    • Hellandite-(Ce)
      • RRUFF Ideal Chemistry changed from "(Ca,Ce)4(Ce,Ca,Th)2(Al,Fe3+,Ti)(Be,Li)2-xB4Si4O22(O,OH,F)2" to "(Ca3Ce)Ce2AlB4Si4O22(OH)2"
      • IMA Ideal Chemistry changed from "(Ca,Ce)4(Ce,Ca,Th)2(Al,Fe3+,Ti)(Be,Li)2-xB4Si4O22(O,OH,F)2" to "(Ca3Ce)Ce2AlB4Si4O22(OH)2"
      • Mineral Comment changed from

        Oberti R, Ottolini L, Camara F, Della Ventura G (1999) Crystal structure of non-metamict Th-rich hellandite-(Ce) from Latium (Italy) and crystal chemistry of the hellandite-group minerals, American Mineralogist 84, 913-921

        to

        Oberti R, Ottolini L, Camara F, Della Ventura G (1999) Crystal structure of non-metamict Th-rich hellandite-(Ce) from Latium (Italy) and crystal chemistry of the hellandite-group minerals, American Mineralogist 84, 913-921

        Chemical formula revised:
        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

  • Feb 26, 2008
    • Hellandite-(Ce)
      • RRUFF Ideal Chemistry changed from "(Ca,Ce)4(Ce,Ca)2(Al,Fe3+,Ti)(Be,Li)B4Si4O22(O,OH,F)2" to "(Ca,Ce)4(Ce,Ca,Th)2(Al,Fe3+,Ti)(Be,Li)2-xB4Si4O22(O,OH,F)2"
      • IMA Ideal Chemistry changed from "(Ca,Ce)4(Ce,Ca)2(Al,Fe3+,Ti)(Be,Li)B4Si4O22(O,OH,F)2" to "(Ca,Ce)4(Ce,Ca,Th)2(Al,Fe3+,Ti)(Be,Li)2-xB4Si4O22(O,OH,F)2"
  • Jun 29, 2006
    • Hellandite-(Ce)
      • IMA Ideal Chemistry changed to "(Ca,Ce)4(Ce,Ca)2(Al,Fe3+,Ti)(Be,Li)B4Si4O22(O,OH,F)2"