单斜晶系
正交晶系
铷
镧系元素
结晶学
热分解
化学
稀土
晶体结构
钾
无机化学
矿物学
离子
有机化学
作者
P. V. Melnikov,Carolina Parada,I. Bueno,E. Morán
标识
DOI:10.1016/0925-8388(93)90409-g
摘要
Synthesis and crystallographic data are reported for a family of double rubidium-rare earth chromates RbLn(CrO4)2, where LnLaLu, Y and Sc. The compounds are closely related to the potassium chromates KLn(CrO4)2 but with a slightly different distribution of structural types: those of La, Pr and Nd are monoclinic, Sm, Eu, Gd are orthorhombic and those of Tb-Lu are also monoclinic but with another unit cell. RbSc(CrO4)2 has high and low temperature forms: hexagonal and monoclinic respectively. Lattice parameters of all the above compounds are given. Thermal decomposition takes place over 450 °C leading to the rare earth chromites and Cr2O3.
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