12436-25-8

Basic information

• Product Name: Sodium Metavanadate
• Synonyms: SODIUM META VANADATE, 99.9%; Sodium vanadate(V); Sodium vanadate (meta); vanadic acid, monosodium salt; Metawanadan sodowy; Sodium metavanadate; Sodium vanadium oxide; sodium oxido(dioxo)vanadium
• CAS NO: 12436-25-8
• Molecular Formula: NaO₃V
• Molecular Weight: 121.9295
• EINECS: 237-272-7
• Mol File: 12436-25-8.mol
• Article Data: 47

Chemical Properties

• Melting Point: 630℃
• CAS DataBase Reference: Sodium Metavanadate(CAS DataBase Reference)
• NIST Chemistry Reference: Sodium Metavanadate(12436-25-8)
• EPA Substance Registry System: Sodium Metavanadate(12436-25-8)

Safety Data

• Hazardous Substances Data: 12436-25-8(Hazardous Substances Data)

Upstream product

• 7758-19-2 sodium chlorite 
• 1310-73-2 sodium hydroxide 
• 497-19-8 sodium carbonate 
• 1307-96-6 cobalt(II) oxide 
• 7722-84-1 dihydrogen peroxide 
• 7757-82-6 sodium sulfate 
• 20644-97-7 vanadyl 
• 80937-33-3 oxygen 

Downstream Products

• 13769-43-2 potassium metavanadate 
• 7681-49-4 sodium fluoride 
• 7789-24-4 lithium fluoride 
• 7647-14-5 sodium chloride 
• 22541-76-0 vanadium(IV) cation 
• 12436-25-8 α-NaVO3 
• 1255199-41-7 tetraphenylphosphonium [2,4,6-tris[hydroxy(methyl)amino]-1,3,5-triazinato-O,N,O]-cis-dioxidovanadate 

Relevant articles and documents

Crystal structures and electronic properties in the crossover region between the spin-gap system CaV2O5 and the linear-chain system NaV2O5

The structural and electronic properties of the Ca1-xNaxV2O5 system, where the composition CaV2O5 exhibits an isolated dimer-like spin-gap state, and NaV2O5 indicates a linear-chain magnetic behaviour and undergoes a spin-singlet transition at Tc = 34 K, have been explored by means of x-ray four-circle diffraction and through magnetization and electron paramagnetic resonance measurements. The crystal structures with 0 2O5, where the space group is Pmmn. The effective V valence is correlated with the V-O bond length in the VO5 pyramid, and the transfer integral for the next-nearest-neighbour V-V path is suggested to be larger than those for other paths, which may be consistent with the formation mechanisms of the dimer in the Ca-rich compounds and the V-O-V molecular orbital in the Na-rich compounds. The magnetic properties for 0 a large reduction of the exchange coupling constant disappears, and no magnetic ordering takes place. The characteristic spin dynamics for the Na-rich compounds is also discussed.

High-pressure synthesis, crystal structures, and characterization of CdVO3-δ and solid solutions CdVO3-NaVO3

CdVO3-δ and solid solutions of Cd1-xNaxVO3 with the GdFeO3-type perovskite structure were prepared using a high-pressure (6 GPa) and high-temperature technique. No significant oxygen and cation deficiency was found in CdVO3. Cd1-xNaxVO3 are formed in the compositional range of 0 {less-than or slanted equal to} x {less-than or slanted equal to} 0.2. CdVO3 and Cd1-xNaxVO3 demonstrate metallic conductivity and Pauli paramagnetism between 2 and 300 K. A large electronic contribution to the specific heat ( γ = 13.4 and 11.2 mJ / ( mol K2) for CdVO3 and Cd0.8Na0.2VO3, respectively) was observed at low temperatures due to the strongly correlated electrons. Crystal structures of CdVO3 and Cd0.8Na0.2VO3 were refined by X-ray powder diffraction: space group Pnma; Z = 4; a = 5.33435 ( 7 ) A, b = 7.52320 ( 9 ) A, and c = 5.26394 ( 6 ) A for CdVO3 and a = 5.32056 ( 9 ) A, b = 7.50289 ( 13 ) A, and c = 5.25902 ( 8 ) A for Cd0.8Na0.2VO3.

Bovine serum albumin binding, antioxidant and anticancer properties of an oxidovanadium(IV) complex with luteolin

Chemotherapy using metal coordination compounds for cancer treatment is the work of the ongoing research. Continuing our research on the improvement of the anticancer activity of natural flavonoids by metal complexation, a coordination compound of the natural antioxidant flavone luteolin (lut) and the oxidovanadium(IV) cation has been synthesized and characterized. Using different physicochemical measurements some structural aspects of [VO(lut)(H2O)2]Na·3H2O (VOlut) were determined. The metal coordinated to two cis-deprotonated oxygen atoms (ArO-) of the ligand and two H2O molecules. Magnetic measurements in solid state indicated the presence of an effective exchange pathway between adjacent vanadium ions. VOlut improved the antioxidant capacity of luteolin only against hydroxyl radical. The antitumoral effects were evaluated on MDAMB231 breast cancer and A549 lung cancer cell lines. VOlut exhibited higher viability inhibition (IC50 = 17 μM) than the ligand on MDAMB231 cells but they have the same behavior on A549 cells (ca. IC50 = 60 μM). At least oxidative stress processes were active during cancer cell-killing. When metals chelated through the carbonyl group and one adjacent OH group of the flavonoid an effective improvement of the biological properties has been observed. In VOlut the different coordination may be the cause of the small improvement of some of the tested properties of the flavonoid. Luteolin and VOlut could be distributed and transported in vivo. Luteolin interacted in the microenvironment of the tryptophan group of the serum binding protein, BSA, by means of electrostatic forces and its complex bind the protein by H bonding and van der Waals interactions.

Amorphous sodium vanadate Na1.5 + yVO3, a promising matrix for reversible sodium intercalation

Sodium insertion into the vanadate NaVO3 shows the formation of an amorphous phase with the composition Na1.5 + yVO3. The latter phase exhibits reversible electrochemical sodium intercalation/de- intercalation properties through a solid solution-like process, for 0 +/Na and a capacity of 150 mAh/g. This result opens the route to the investigation of amorphous matrices involving transition metal oxides for sodium ion battery applications.

High pressure behavior of α-NaVO3: A Raman scattering study

The reported pressure-induced amorphization in α-NaVO3 has been re-investigated using Raman spectroscopy. Discontinuous changes are noted in the Raman spectrum above 5.6 GPa implying large structural changes across the transition. The decrease in frequency of the V-O stretching mode across the transition suggests that the vanadium atom may be in octahedral coordination in the high pressure phase. Excessive broadening of the internal modes is observed above 6 GPa. New peaks characteristic of a crystalline phase gain in intensity at higher pressures in the bending modes region; however, the transformation is not complete even at 13 GPa. Co-existence of phases is noted over a significant pressure range above the onset of transition. Pressure released spectrum is found to be a mixture of crystalline α-phase, traces of crystalline β-phase and highly disordered phase consisting of V-O units in five- and six-fold coordination.

Magnetic Susceptibility of Quasi-One-Dimensional Compound α'-NaV2O5 - Possible Spin-Peierls Compound with High Critical Temperature of 34 K -

Stoichiometric powder samples of α'-NaV2O5 were synthesized and the magnetic susceptibility was measured in the temperature range from 2K to 7000 K. The magnetic susceptibility has a good fit to the equation for an S = 1/2 antiferromagnetic Heisenberg linear chain with J/KB = 280 K and g = 2 above 34 K. Below 34 K the magnetic susceptibility rapidly decreases with decreasing temperature to a constant value of 1.49 × 10-4 emu/V4+ -mol which is reasonable for spin-singlet V4+-V4+ pairs. This rapid reduction of the spin susceptibility below 34 K suggests the existence of a spin-Peierls transition. α'-NaV2O5 is a possible spin-Peierls compound with the highest critical temperature yet observed.

Synthesis of polyoxovanadates from aqueous solutions

Polyoxovanadates have been synthesized from aqueous solutions of Vv in the presence of inorganic Na+ and organic [N(CH3)4]+ cations. Decavanadate crystals are precipitated at room temperature around pH 7, whereas layered compounds Na[V3O8].H2O and N(CH3)4[V4O10] are formed at the same pH under hydrothermal conditions: In situ 51V NMR experiments show that upon heating solute decavanadate species are progressively transformed into cyclic metavanadates [V4O12]4-. A chemical mechanism is suggested for the formation of these layered vanadium oxides. It involves the ring-opening polymerization of cyclic metavanadates arising from co-ordination expansion favored by protonation or vanadium reduction.

Tailoring NaVO3 as a novel stable cathode for lithium rechargeable batteries

Vanadium-based compounds hold great promise as high capacity cathode candidate for future lithium rechargeable batteries. However, developing highly stable vanadium-based cathode materials with long cycle life remains a great challenge. Herein, we report a novel layered sodium vanadium oxide, NaVO3, as a promising cathode electrode contender. This material is capable of delivering a capacity of 224.8 mAh g?1 at the current density of 150 mA g?1, and a high rate capability of 85 mAh g?1 even at a high current density of 3 A g?1. Moreover, outstanding capacity retention of 77% after 1000 cycles is achieved. Ex situ characterizations verify that the excellent electrochemical performance of NaVO3 is attributed to superior structural stability and electrochemical reversibility upon long-term cycling. Furthermore, the lithium ion de/intercalation mechanism for NaVO3 is also revealed involving one electron transfer reaction between V5+ and V4+ redox couple. Considering the low cost and material sustainability as well as the outstanding electrochemical performances, we believe that NaVO3 is a highly promising cathode material for lithium rechargeable batteries and our findings may help to pave the way for developing vanadium-based layered structure materials for high-performance alkali and alkaline-earth ion batteries.

The initial rate of solid-phase reaction and composition of the reaction product

Dependence of initial reaction rate on the initial composition of reaction mixture in the systems of Na2CO3-V2O 5, Na2CO3-Fe2O3, and Na2CO3-AgCl

Synthesis and physicochemical study of M4Na2V 10O28 · 10H2O (M = K, Rb, NH 4)

The formation conditions and physicochemical properties of binary decavanadates M4Na2V10O28 · 10H2O (M = K, Rb, NH4), synthesized by crystallization from saturated solutions of the NaVOsub

Investigation of the new P′3-Na0.60VO2 phase: Structural and physical properties

A new layered phase Na0.60VO2 was synthesized by chemical deintercalation of sodium from the pristine compound O3-NaVO 2. The Na0.60VO2 compound exhibits a distorted P′3;type oxygen stacking (AABBCC)

Charge order and quasi-one-dimensional behavior in β(β′)-AxV2O5

Quasi-one-dimensional conductor β(β′)-AxV2O5 (A=Li, Na, Ag, Ca, Sr, Cu) was investigated for its electric and magnetic properties. The β-A0.33V2O5 (A=Li, Na, Ag, Ca, Sr) phases show a phase transition accompanied by a charge separation and a charge order. The low temperature phase of β-A0.33+V2O5 shows a long-range magnetic order at lower temperature whereas β-A0.332+V2O5 shows a formation of spin gap without any magnetic order. The magnetic properties of the low temperature phases strongly suggest a linear chain for β-A0.33+V2O5 and a two-leg ladder chain for β-A0.332+V2O5 as a charge ordered pattern of magnetic V4+ ions. A quasi-one-dimensional conductor β′-Cu0.65V2O5 shows a superconducting transition under high pressure around 4 GPa at 5 K.

Effect of alkali metal ion and hydrogen bonds on thermal stability of M[VO(O2)2bpy]·nH2O (M = Li +-Rb+) and Cs[VO(O2)2bpy] ·H2O2 complexes

The compounds M[VO(O2)2bpy]·nH2O (M = Li+-Rb+) and Cs[VO(O2)2bpy] ·H2O2 were characterized by thermogravimetry (TG). In the course of TG experiments, performed from 25 up to 550 °C, three main stages of decomposition were observed: (i) dehydration, (ii) releasing of the oxygen molecules and (iii) decomposition of bpy. The final product of decomposition is MVO3, with small amounts of paramagnetic vanadium(IV) species. Volatile products were detected on-line using mass spectrometer. Mechanism of the decomposition is discussed on the basis of crystal structures of complexes. The main role is played by hydrogen bonds involving peroxo ligands and polarising power of alkali metal ions.

PROPERTIES OF Na2SO4 DOPED WITH NaVO3 AND Pr2(SO4)3 AS A SOLID ELECTROLYTE

Sodium sulfate doped with both sodium vanadate and praseodymium sulfate has been investigated as solid electrolyte for SO2 detecting device.Na2SO4-NaVO3-Pr2(SO4)3 (91.1:3.9:5.0) shows higher electric conductivity than pure Na2SO4.The measured EMF for an SO2 concentration cell using this electrolyte is in good accord with the calculated one.NaVO3 stabilizes a high temperature phase, Na2SO4-I.

Rapid synthesis of size-controllable YVO4 nanoparticles by microwave irradiation

Sized-controlled YVO4 nanoparticles have been synthesized by a simple microwave irradiation processing. The products were characterized by X-ray diffraction, transmission electron microscopy, and ultraviolet-visible spectroscopy. The results showed that the size of as-synthesized YVO4 powders was in the range of 5-18 nm and was extremely dependent on the solution pH value. The optical measurements displayed the obvious quantum-size effect of the products.

XPS study of nanorods of doped vanadium oxide M x V 2O5 ? nH2O (M = Na, K, Rb, Cs)

Nanorods of vanadium oxide doped with alkali metal ions M x V2O5 ? nH2O (M = Na, K, Rb, Cs, x = 0.31-0.44) have been obtained under hydrothermal conditions. The particles are 30-80 nm in diameter and a few micro

KVTeO5 and a redetermination of the Na homologue

A single crystal of KVTeO5, potassium vanadium tellurite, was grown and a redetermination of the Na homologue was presented. The structure was determined with the refinement of the NaVTeO5 homologue, sodium vanadium tellurite. The network consisted of [VTeO5]n ribbons built up by VO4 tetrahedra linking centrosymmetric Te2O6 groups and stacked along the [010] direction. Results showed that the TeIV atom exhibited a typical onesided coordination number (CN) of 4.

Synthesis and characterization of the crystal structure and magnetic properties of the ternary manganese vanadate NaMnVO4

A new ternary manganese vanadate, NaMnVO4, was synthesized by solid state reaction route, and its crystal structure and magnetic properties were characterized by X-ray diffraction, magnetic susceptibility and specific heat measurements, and by density functional calculations. NaMnVO4 crystallizes in the maricite-type structure with space group Pnma, a = 9.563(1) A, b = 6.882(1) A, c = 5.316(1) A, and Z = 4. NaMnVO 4 contains MnO4 chains made up of edge-sharing MnO 6 octahedra, and these chains are interlinked by VO4 tetrahedra. The magnetic susceptibility has a broad maximum at Tmax = 24 K and follows the Curie-Weiss behavior above 70 K with θ = -62 K. NaMnVO4 undergoes a three-dimensional antiferromagnetic ordering at TN = 11.8 K. The spin exchanges of NaMnVO4 are dominated by the intrachain antiferromagnetic exchange, and the interchain spin exchanges are spin-frustrated. The most probable magnetic structure of the ordered magnetic state below TN was predicted on the basis of the extracted spin exchanges.