1344-58-7 Usage
Chemical Properties
Different sources of media describe the Chemical Properties of 1344-58-7 differently. You can refer to the following data:
1. -100 mesh; has six forms: α is hexagonal brown, β is orange monoclinic, γ is bright yellow rhomb, δ is red cub, ε is brick red tricl, ηis rhomb; UO3 can be obtained by thermal decomposition of uranyl compounds, e.g, carbonates, oxalates nitrates [KIR83] [CER91]
2. Uranium trioxide has been isolated in six well-defined stoichiometric modifications as well as a hypostoichiometric modification, UO2. Similar to U3O8, the trioxide decomposes into lower oxides prior to melting or subliming. Even though UO3 is formally U(VI), a small temperature-dependent paramagnetism exists with molar magnetic susceptibility values ranging from 128 to 157×10?6 cm3/mol. A general trend has been observed for the densities of uranium oxides; an inverse proportionality between the O/U ratio and the density of the material. The trioxide does not deviate from this trend with density values ranging from 6.99 to 8.54 g/cm3, depending on the modification.
Uses
Uranium trioxide, UO3, is a versatile solid that has important applications in the nuclear fuel cycle.
Purification Methods
The oxide is dissolved in HClO4 (to give a uranium content of 5%), and the solution is adjusted to pH 2 by addition of dilute ammonia. Dropwise addition of 30% H2O2, with rapid stirring, precipitated U(VI) peroxide, the pH being held constant during the precipitation, by addition of small amounts of the ammonia solution. Then H2O2 is added until further quantities caused no change in pH. After stirring for 1hour, the slurry is filtered through coarse filter paper in a Büchner funnel, washed with 1% H2O2 acidified to pH 2 with HClO4, then heated at 350o for three days in a large platinum dish [Baes J Phys Chem 60 878 1956].
Check Digit Verification of cas no
The CAS Registry Mumber 1344-58-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,3,4 and 4 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1344-58:
(6*1)+(5*3)+(4*4)+(3*4)+(2*5)+(1*8)=67
67 % 10 = 7
So 1344-58-7 is a valid CAS Registry Number.
InChI:InChI=1/3O.U/rO3U/c1-4(2)3
1344-58-7Relevant articles and documents
Mg, Ca and Ba glutaratouranylates – Synthesis and structure
Novikov,Serezhkina,Grigoriev,Serezhkin
, p. 147 - 152 (2018)
Three novel uranyl coordination polymers were synthesized and structurally characterized by single crystal X-ray diffraction – [Mg(H2O)6][UO2(glt)(Hglt)]2·6H2O (1), [Ca(H2O)4][UO2(glt)(Hglt)]2·4H2O (2) and [Ba(H2O)5][UO2(glt)(Hglt)]2·2H2O (3), where glt = C5H6O42? (glutarate) and Hglt = C5H7O4? (hydroglutarate) anions. The structures of compounds 1–3 contain 1D [UO2(glt)(Hglt)]? units that belong to the AQ02B01 (A = UO22+, Q02 = glt, B01 = Hglt) crystallochemical group. The different roles of alkaline earth R2+ cations in the structures and the flexibility of the glutarate anions account for the structural distinctions of 1–3. The diverse ways for the connection between the R2+ ions and the [UO2(glt)(Hglt)]? chains, the water content and the geometry of the uranyl-glutarate units present the main structural features of the new complexes. A comparative analysis based on Pauling's second rule of 1–3 and alkali glutaratouranylates has allowed an explanation of their structural dissimilarity.
