Pertechnetates

Pertechnetate ion

Pertechnetates are a group of chemical compounds that contain the pertechnetate anion TcO ₄ ^- . They are the salts of the pertechnetic acid HTcO ₄ .

Extraction and presentation

The neutralization of the pertechnetic acid by a base can produce the pertechnetate ion.

${\displaystyle {\ce {OH- + HTcO4 -> TcO4- + H2O}}}$

Examples:

${\displaystyle {\ce {NaOH + HTcO4 -> NaTcO4 + H2O}}}$

Sodium hydroxide and pertechnetic acid react to form sodium pertechnetate and water .

${\displaystyle {\ce {KOH + HTcO4 -> KTcO4 + H2O}}}$

Potassium hydroxide and pertechnetic acid react to form potassium pertechnetate and water .

properties

The pertechnetates have a tetragonal structure analogous to the perrhenate ion and the perchlorate ion. It shares similar behavior with the Perrhenates. The pertechnetates crystallize in mostly identical crystal structures . Sodium , potassium , rubidium and silver (I) pertechnetate crystallize in a tetragonal crystal structure with the space group I 4 ₁ / a (space group no. 88) . Cesium pertechnetate and thallium pertechnetate crystallize in the orthorhombic space group Pnma (No. 62) .

Examples

• Ammonium pertechnetate NH ₄ TcO ₄
• Cesium pertechnetate CsTcO ₄
• Potassium pertechnetate KTcO ₄
• Sodium pertechnetate NaTcO ₄
• Rubidium pertechnetate RbTcO ₄
• Silver (I) pertechnetate AgTcO ₄
• Thallium (I) pertechnetate TlTcO ₄

Individual evidence

1. ↑ Steven A. Luksic, Brian J. Riley, Kent E. Parker, Pavel Hrma: Sodalite as a vehicle to increase Re retention in waste glass simulant during vitrification . In: Journal of Nuclear Materials . October 2016, p. 331-337 , doi : 10.1016 / j.jnucmat.2016.07.002 .
2. ↑ Klaus Schwochau: Technetium: Chemistry and Radiopharmaceutical Applications . John Wiley & Sons, 2008, ISBN 3-527-61337-4 , pp. 131 .