PART II

_THE CHEMISTRY OF THE ELEMENTS_

IX. GENERAL PROPERTIES OF THE CERIUM AND YTTRIUM GROUPS 111

X. GENERAL METHODS OF SEPARATION 142

XI. THE CERIUM GROUP--CERIUM 156

XII. THE CERIUM GROUP (CONTINUED)--LANTHANUM, PRASEODYMIUM, NEODYMIUM, AND SAMARIUM 168

XIII. THE TERBIUM GROUP 184

XIV. THE ERBIUM AND YTTERBIUM GROUPS--YTTRIUM AND SCANDIUM 194

XV. THE GROUP IVA ELEMENTS--TITANIUM 219

XVI. THE GROUP IVA ELEMENTS (CONTINUED)--ZIRCONIUM AND THORIUM 238