The Rare EarthsNote 462 — Chapter XVI · THE GROUP IVA ELEMENTS (continued)—ZIRCONIUM AND THORIUMReading editionWedekind and Lewis, Annalen, 1910, 371, 367.◇Copy noteReturn to CHAPTER XVI THE GROUP IVA ELEMENTS (continued)—ZIRCONIUM AND THORIUMReturn to CHAPTER XVI THE GROUP IVA ELEMENTS (continued)—ZIRCONIUM AND THORIUM