[238] Monats. 1885, 6, 477; Sitzungsber. kaiserl. Akad. Wiss. Wien, 1885, 92, II, 317.
GROUP A
Mixed Double Nitrates.
2R(NO₃)₃,3Mg(NO₃)₂,24H₂O.
1 La, Pr Compounds. Fractionate as R(NO₃)₃,2NH₄NO₃,4H₂O.
2 Pr, Nd Compounds. Fractionate as 2R(NO₃)₃,3Mn(NO₃)₂,24H₂O.
3 Crude Nd Compounds. Continue the Separation.
4 Mother-liquors. Sa, Eu, Gd, etc. Crystallise with Bismuth magnesium nitrate.
Terbium elements.
5 Pure La Compound. Refine by Sulphate crystallisation.
6 Pr with La. Continue.
7 Impure Pr Compound. Continue.
8 Pure Nd Compound. Refine by Sulphate crystallisation.
9 Pure Sa Compound.
Mixture of Pr, La.
Pr. Refine by Sulphate crystallisation.
Fig. 8.—Separation of the Cerium Elements