Sodium technetate(V)

Sodium technetate(V)

Sodium metatechnetate
Names
IUPAC name Sodium technetate(V)
Other names Sodium metatechnetate
Identifiers
CAS Number	12034-16-1  Y
3D model (JSmol)	Interactive image
SMILES [Na+].[O-][Tc](=O)=O
Properties
Chemical formula	NaTcO3
Molar mass	168.8942 g/mol
Appearance	black solid [1]
Melting point	800 °C (1,470 °F; 1,070 K) (decomposes) [1]
Solubility in water	insoluble
Hazards
Occupational safety and health (OHS/OSH):
Main hazards	toxic, radioactive
Related compounds
Other anions	Sodium pertechnetate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Sodium technetate(V) is an inorganic compound with the chemical formula NaTcO₃. It is a perovskite material and a rare example of an insoluble sodium salt. ^[2]

Preparation

Sodium technetate(V) can be prepared by co-heating technetium, sodium pertechnetate and sodium oxide, and decomposition occurs at high temperature. ^[3] In addition, Na⁹⁹
₂MoO₄ decomposed in a NaOH solution will also produce NaTcO₃. ^[4] The NaTcO₃ puckering effect resembles NaMoO₃ and the band between the e^π
_g and a_1g state disappears. ^[5]

Properties

NaTcO₃ is a black solid that is a member of the Na₂O–Tc₂O₅ system. It is stable to 800 °C (1,470 °F; 1,070 K). ^[1]

References

1. Keller, C.; Kanellakopulos, B. (1965-04-01). "Ternäre oxide des drei-bis siebenwertigen technetiums mit alkalien" . Journal of Inorganic and Nuclear Chemistry (in German). 27 (4): 787–795. doi:10.1016/0022-1902(65)80438-9. ISSN   0022-1902.
2. Sabine Körbel, Miguel A. L. Marques, Silvana Botti (25 February 2016). "Stability and electronic properties of new inorganic perovskites from high-throughput ab initio calculations" . Journal of Materials Chemistry C. 4 (15): 3157–3167. doi:10.1039/C5TC04172D. ISSN   2050-7526 . Retrieved 3 May 2023.
3. 无机化学丛书. 第九卷 锰分族 铁系 铂系, pg. 122. 3.11 氧化数为V的锝和铼化合物.
4. M. Fis̆er, V. Brabec, O. Dragoun, A. Kovalík, J. Frána, M. Rys̆avý (1985). "Determination of 99mTc valent form in solids by measurement of internal conversion electrons". The International Journal of Applied Radiation and Isotopes. 36 (3): 219–222. doi:10.1016/0020-708X(85)90071-7. Archived from the original on 2018-07-02. Retrieved 3 May 2023.
5. M. H. N. Assadi, Masashi Okubo, Atsuo Yamada, Yoshitaka Tateyama (8 February 2018). "Oxygen redox in hexagonal layered Na_xTMO₃ (TM = 4d elements) for high capacity Na ion batteries" . Journal of Materials Chemistry A. 6 (8): 3747–3753. doi:10.1039/C7TA10826E. ISSN   2050-7488 . Retrieved 3 May 2023.

External reading

• Keller, C.; Kanellakopulos, B. (April 1965). "Ternäre oxide des drei-bis siebenwertigen technetiums mit alkalien" [Ternary oxides of tri- to septivalent technetium and alkali metals]. Journal of Inorganic and Nuclear Chemistry. 27 (4): 787–795. doi:10.1016/0022-1902(65)80438-9.
• Kanellakopulos, Basil. The ternary oxide of 3-to 7-valent technetium with alkalis. (1964), (AEC Accession No. 31424, Rept. No. KFK-197), pg. 73.