Synthesis and study of compounds of the general formula MIITh(VO4)2 (MII = Mn, Cd, Ca, Sr, Pb, or Ba)

被引：4

作者：

Knyazev, A. V. ^{[1
]}

Chernorukov, N. G. ^{[1
]}

Sazonov, A. A. ^{[1
]}

Bulanov, E. N. ^{[1
]}

机构：

[1] Nizhnii Novgorod State Univ, Nizhnii Novgorod 603950, Russia

来源：

RUSSIAN JOURNAL OF INORGANIC CHEMISTRY | 2012年 / 57卷 / 05期

关键词：

Thorium; Scheelite; Bivalent Metal; Thorium Nitrate; Thermal Expansion Coeffi Cients;

D O I：

10.1134/S0036023612050130

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Double vanadates of thorium and bivalent metals with r(M-II) a parts per thousand yen 0.96 were prepared by high-temperature solid-phase reactions. Manganese and barium derivatives were obtained for the first time. The compounds crystallize in three structural types: zircon for manganese, cadmium, calcium, strontium, and lead derivatives; scheelite for the lead phase; and monazite for the compounds containing lead and barium. Thus, two morphotropic transitions are observed in the series of the compounds studied; and for double thorium vanadates of lead, strontium, and barium, phase transitions are observed. The bands in the IR spectra were assigned. The incongruent melting points of the compounds were determined by differential scanning calorimetry. Compounds beta-PbTh(VO4)(2) and BaTh(VO4)(2) were studied by high-temperature X-ray diffraction.

引用

页码：639 / 645

页数：7