Abstract
Triple molybdate NaCoCr(MoO4)3, a phase of variable composition Na2MoO4-CoMoO4-Cr2(MoO4)3 (0 ≤ x ≤ 0.5) having nasicon structure (space group R\( \bar 3 \)c), and triple molybdate NaCo3Cr(MoO4)5 crystallizing in triclinic space group P\( \bar 1 \) were synthesized in the subsolidus region of the Na2MoO4-CoMoO4-Cr2(MoO4)3 ternary salt system. Crystal parameters were calculated for the newly synthesized molybdates and phases. The vibration spectra of Na1 − xCo1 − xCr1 + x(MoO4)3 and electrophysical properties were studied. Upon Na + Co → Cr(III) substitution, chromium cations are distributed to cobalt sites and additional vacancies are generated in the sodium sublattice.
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