PHASE RELATIONS IN Cs <sub>2</sub>MoO <sub>4</sub>-Ln <sub>2</sub>(MoO <sub>4</sub>) <sub>3</sub>-Zr(MoO <sub>4</sub>) <sub>2</sub> (Ln = Nd, Sm, Tb, Er) SYSTEMS
SYSTEMS Cs <sub>2</sub>MoO <sub>4</sub>-Ln <sub>2</sub>(MoO <sub>4</sub>) <sub>3</sub>-Zr(MoO <sub>4</sub>) <sub>2</sub> (Ln = Nd, Sm, Tb, Er) systems were studied by X-ray phase analysis in the subsolidus area. Quasibinary sections were identified and triangulation was held. In systems the formation of triple molyb-dates Cs <sub>2</sub>LnZr <sub>2</sub>(MoO <sub>4</sub>) <sub>65</sub> (Ln = Nd, Sm, Tb, Er) (2:1:4) was defined for the first time.