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InChI:InChI=1/3O.Rb.V/q;;-1;+1;/rO3V.Rb/c1-4(2)3;/q-1;+1

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• 13126-12-0 rubidium nitrate 

Relevant academic research and scientific papers

Thermochemical and luminescent properties of RbVO3, CsVO 3, and Rb0.5Cs0.5VO3

RbVO3, CsVO3, and Rb0.5Cs 0.5VO3 have been synthesized by the Pechini process. The vanadates have an orthorhombic structure (sp. gr. Pbcm), melt congruently in the range 650-530°C, and undergo a reversible phase transition in the range 520-340°C. We have determined the onset temperatures and end points of the transformations at a temperature scan rate of 3°C/min and their enthalpies, and measured the photo-, roentgeno-, and cathodoluminescence and diffuse reflectance spectra of the vanadates. The luminescence spectra each are well fitted with three pseudo-Voigt functions. CsVO3 has the highest integrated emission intensity. The emission intensity of the Rb 0.5Cs0.5VO3 solid solution is lower than that of the simple vanadates because of the optical absorption around its intrinsic luminescence band. This may be due to the presence of stable vacancy-type structural defects in Rb0.5Cs0.5VO3.

Subsolidus phase relations in the systems M2+O-M 2+O-V2O5 (M+ = Li, Na, K, Rb, Cs; M2+ = Mg, Ca)

Subsolidus phase relations in the M2O(M2CO 3)-MgO-V2O5 and M2O(M 2CO3)-CaO-V2O5 (M = Li, Na, K, Rb, Cs) systems are studied. Twenty mixed vanadat

Synthesis, structures and magnetic properties of the new vanadates AgMnVO4 and RbMnVO4

The new compounds, AgMnVO4 and RbMnVO4 have been synthesized by solid state reaction route. Their crystal structures were determined from single-crystal X-ray diffraction data for RbMnVO4 and powder X-ray diffraction data for AgMnVO4. AgMnVO4 crystallizes with the maricite-type structure in space group Pnma, a=9.5778(6) A, b=6.8518(4) A, c=5.3734(3) A and Z=4. RbMnVO4 crystallizes in space group P63 with a stuffed tridymite-type structure, a=11.2584(3), c=8.9893(13) A and Z=8. A merohedral twinning was taken into account for its structural refinement. To our knowledge this is the first vanadate showing this structural type. AgMnVO4 and RbMnVO4 were characterized by magnetic susceptibility and specific heat measurements. AgMnVO4 is antiferromagnetic with a Neel temperature of 12.3 K determined by specific heat measurements. RbMnVO4 exhibits canted antiferromagnetism with a Neel temperature of 6.5 K.

Crystal structures of new pyrovanadates A2MnV2O 7 (A = Rb, K)

The new compounds A2MnV2O7 (A - K, Rb) with structures related to the melilite-type have been synthesized by a solid state reaction route. The crystal structures of K2MnV 2O7, Rb2MnV2O7 and KRbMnV2O7 have been determined using X-ray single crystal diffraction data. The compound K2MnV2O7 crystallizes with a melilite-type structure with tetragonal unit cell parameters a = 8.609(3), c = 5.538(4) ?and space group P4?21m. The structures of Rb2MnV2O7 and KRbMnV 2O7 are derived from the mehlite-type structure with space group P42mnm and unit cell parameters a = 8.577(6), c=11.809(6) ?, and a = 8.530(6), c = 11.466(5) ?, respectively. The three structures consist of [MnV2O7]2- layers perpendicular to the c axis separated by A+ layers. The [MnV 2O7]2- layers feature corner-sharing MnO 4 tetrahedra and V2O7 pyrovanadate units, the linkage leading to rings of five tetrahedra. The doubling of the c parameter for Rb2MnV2O7 or Rb2MnV 2O7 is explained by the existence of a mirror plane perpendicular to the [001] direction between two [MnV2O 7]2- layers. The A+ alkali cations occupy distorted square antiprisms of oxygen atoms in K2MnV 2O7 and distorted square prisms of oxygen atoms in Rb 2MnV2O7 and Rb2MnV2O 7.

Mode of thermal decomposition of diammonium lithium oxyfluoro vanadate (DALOFV) and diammonium rubidium oxyfluoro vanadate (DAROFV)

Diammonium lithium and diammonium rubidium oxyfluoro vanadates have beensynthesised by solid state reactions at room temperature and their ther mal decomposition mechanism determined by using simultaneous TG/DTA. Thereaction intermediates have been synthe

A3V5O14 (A = K+, Rb +, or Tl+), New polar oxides with a tetragonal tungsten bronze related structural topology: Synthesis, structure, and functional properties

Three polar noncentrosymmetric (NCS) oxide materials, A3V 5O14 (A = K+, Rb+, or Tl +), have been synthesized by hydrothermal and conventional solid state techniques. Their crystal structures and functional properties (second-harmonic generation, piezoelectricity, and polarization) have been determined. The iso-structural materials exhibit a layered structural topology that consists of corner-sharing VO4 tetrahedra and VO5 square pyramids. The layers stack parallel to the c-axis direction and are separated by the K+, Rb+, or Tl+ cations. Powder second-harmonic generation (SHG) measurements using 1064 nm radiation indicate the materials exhibit moderate SHG efficiencies of ～100× α-SiO2. Additional SHG measurements, that is, particle size versus SHG efficiency, indicate the materials are type-I phase-matchable. Converse piezoelectric measurements for K3V5O 14, Rb3V5O14, and Tl 3V5O14 revealed d33 values of 28, 22, and 26 pm/V, respectively. Pyroelectric measurements, that is, temperature-dependent polarization measurements, resulted in pyroelectric coefficients of -2.2, -2.9, and -2.8 μC/m2K at 65 °C, for K3V5O14, Rb3V5O 14, and Tl3V5O14 respectively. Frequency-dependent polarization measurements confirmed that all of the materials are nonferroelectric, consistent with our first principle density functional theory (DFT) electronic structure calculations. Infrared, UV-vis, thermogravimetric, and differential scanning calorimetry measurements were also performed. Crystal data: K3V5O14, trigonal, space group P31m (No. 157), a = 8.6970(16) A, c = 4.9434(19) A, V = 323.81(15), and Z = 1; Rb3V5O14, trigonal, space group P31m (No. 157), a = 8.7092(5) A, c = 5.2772(7) A, V = 346.65(5), and Z = 1; Tl3V5O14, trigonal, space group P31m (No. 157), a = 8.7397(8) A, c = 5.0846(10) A, V = 336.34(8), and Z = 1.

Synthesis, structure, and properties of M[VO2(XO 4)(H2O)2] · H2O (X = S, M = K, Rb, NH4, Tl; X = Se, M = K, Rb, NH4)

Keeping of MVO(XO4)2 under saturated vapor pressure at room temperature resulted in the synthesis of a number of isostructural complexes M[VO2(XO4)(H2O)2] · H2O, where X = S, M = K, Rb, NH4, Tl and X = Se, M = K, Rb, NH4. The conclusion about the isostructural nature of the synthesized sulfate and selenate compounds was based on X-ray diffraction and vibrational spectroscopy data. Characteristic features of the thermal decomposition of M[VO2(XO4)(H2O)2] · H2O on heating in air were identified. It was shown that K[VO2(SeO4)(H2O)2] · H 2O tends to undergo spontaneous dehydration under ambient conditions to give the monohydrate K[VO2(SeO4)(H2O)]. Pleiades Publishing, Ltd., 2011.

Improvement of luminescence properties of rubidium vanadate, RbVO3, phosphors by erbium doping in the crystal lattice

Greenish-white emitting Rb1-xErxVO3 (0 ≤ x ≤ 0.10) phosphors were synthesized by a conventional solid state reaction method. The thermal quenching effect of the RbVO3 phosphors was effectively improved by Er3+ doping into the RbVO3 lattice. Consequently, the emission peak intensity of the phosphors was successfully enhanced by Er3+ doping, and the internal quantum efficiency of Rb0.99Er0.01VO3 under excitation at 360 nm was 80%.

Synthesis, structure, and properties of M3VO2(SO 4)2 (M = Rb, Cs)

Vanadium(V) complexes of general composition M3VO 2(SO4)2 (M = Rb, Cs) were synthesized by a solid-state route. The individuality of the synthesized compounds was proved by X-ray and neutron diffraction, vibrational spectroscopy, and microscopic analysis. The X-ray diffraction patterns of M3VO2(SO 4)2 were indexed to fit the monoclinic system (space group P2/c, Z = 4) with the following unit cell parameters: a = 11.6487(2) ?, b = 8.4469(2) ?, c = 12.1110(2) ?, β = 109.483(1)°, V = 1123.43 ?3 (Rb); a = 12.0546(3) ? b = 8.7706(2) ?, c = 12.6496(3) ?, β = 109.843(2)°, V = 1257.99 ?3 (Cs). In the crystal structure of M3VO 2(SO4)2, [VO2(SO4) 2]3- complex anions can be discerned in which the vanadium atom is surrounded by five oxygen atoms: two oxygen atoms form short terminal V-O bonds, and three oxygen atoms are from the two sulfato groups, one of which acts as a monodentate ligand and the other acts as a bidentate chelating ligand.

On a rubidium cadmium oxovanadate(V) showing a tunnel structure: RbCd3(VO4)(V2O7)

Coulorless single crystals of RbCd3(VO4)(V2O7) have been prepared by heating of RbVO3, CdO and V2O5 in closed steel tubes. It shows monoclinic symmetry, space group C52h-P21/c, a = 8.397(2), b = 9.775(2), c = 12.616(2) ?, β = 98.50(2)°, Z = 4. Despite the similarity of the chemical composition to other oxovanadates(V) RbCd3(VO4)(V2O7) form a new structure type, characterized by a [Cd3V3O11] network made up from CdO6 octahedra, VO4 tetrahedra and V2O7 divanadate groups. Typical features are edge shared [Cd3O13] units and the edge bridging of two CdO6 octahedra by one V2O7 group.