Non-centrosymmetric Rb2Mn2(MoO4)3
نویسندگان
چکیده
The title compound, dirubidium dimanganese(II) tris-(tetra-oxo-molyb-date), Rb2Mn2(MoO4)3, was prepared by solid-state reactions. The structure can be described as being composed of MnO6 octa-hedra sharing corners with MoO4 tetra-hedra. The three-dimensional framework contains cavities in which the rubidium ions are located. The Rb(+) cations are within distorted nine- and 12-vertex polyhedra. The pairs of different Mn(2+) and Rb(+) cations are each located on threefold rotation axes.. Rb2Mn2(MoO4)3 is isotypic with compounds of the Cs2 M 2Mo3O12 (M = Ni, Fe) family. A comparative structural description is provided between the structure of the title compound and those of related phases. Differences with structures such as alluaudite are discussed.
منابع مشابه
The modulated structure and frequency upconversion properties of CaLa2(MoO4)4:Ho(3+)/Yb(3+) phosphors prepared by microwave synthesis.
CaLa2-x(MoO4)4:Ho(3+)/Yb(3+) phosphors with the doping concentrations of Ho(3+) and Yb(3+) (x = Ho(3+) + Yb(3+), Ho(3+) = 0.05; Yb(3+) = 0.35, 0.40, 0.45 and 0.50) have been successfully synthesized by the microwave sol-gel method. The modulated and averaged crystal structures of CaLa2-x(MoO4)4:Ho(3+)/Yb(3+) molybdates have been found by the Rietveld method, and the upconversion photoluminescen...
متن کاملSynthesis, crystal structure and charge-distribution validation of β-Na4Cu(MoO4)3 adopting the alluadite structure-type
Single crystals of a new variety of tetra-sodium copper(II) tris-[molybdate(VI)], Na4Cu(MoO4)3, have been synthesized by solid-state reactions and characterized by single-crystal X-ray diffraction. This alluaudite structure-type is characterized by the presence of infinite layers of composition (Cu/Na)2Mo3O14 parallel to the (100) plane, which are linked by MoO4 tetra-hedra, forming a three-dim...
متن کاملNaGd(MoO4)2 nanocrystals with diverse morphologies: controlled synthesis, growth mechanism, photoluminescence and thermometric properties
Pure tetragonal phase, uniform and well-crystallized sodium gadolinium molybdate (NaGd(MoO4)2) nanocrystals with diverse morphologies, e.g. nanocylinders, nanocubes and square nanoplates have been selectively synthesized via oleic acid-mediated hydrothermal method. The phase, structure, morphology and composition of the as-synthesized products are studied. Contents of both sodium molybdate and ...
متن کاملCRYSTAL CHEMISTRY OF URANYL MOLYBDATES. VIII. CRYSTAL STRUCTURES OF Na3Tl3[(UO2)(MoO4)4], Na13–xTl3+x[(UO2)(MoO4)3]4(H2O)6+x (x = 0.1), Na3Tl5[(UO2)(MoO4)3]2(H2O)3 AND Na2[(UO2)(MoO4)2](H2O)4
Crystals of four sodium uranyl molybdates, Na3Tl3[(UO2)(MoO4)4] (1), Na13–xTl3+x[(UO2)(MoO4)3]4(H2O)6+x (x = 0.1) (2), Na3Tl5[(UO2)(MoO4)3]2(H2O)3 (3) and Na2[(UO2)(MoO4)2](H2O)4 (4), have been synthesized by hydrothermal methods. The structure of each was solved and refined on the basis of F2 for all unique data collected using MoK X-radiation and a CCD-based detector. The structure of 1 [orth...
متن کاملStructure cristalline de type alluaudite K0.4Na3.6Co(MoO4)3
A new triple molybdate, potassium sodium cobalt tris-(molybdate), K0.4Na3.6Co(MoO4)3, was synthesized using solid-state reactions. The Co(2+) and one Na(+) cation are located at the same general site, each with occupancy 0.5. Another site (site symmetry 2) is occupied by Na(+) and K(+) cations, with occupancies of 0.597 (7) and 0.402 (6), respectively. The other two Na(+) cations and one of the...
متن کامل