The coordination chemistry of the actinide halides

Some investigations in the zirconium tetrafluoride-water system

Durch Ammonolyse des ThF4 im Ammoniakstrom bei 850°C wurde ThNF hergestellt. Die Verbindung ist hydrolysebestandig, sie kristallisiert in einem rhomboedrischen Schichtengitter, isotyp dem LaOF. ThNF kann man auch aus Th3N4 und ThF4 herstellen. Dieses Verfahren fuhrt ferner zu zwei weiteren Phasen ThNxF4−3x, von denen die Phase mit 0,94 ≥ x ≥ 0,88 tetragonal, die mit 0,87 ≥ x ≥ 0,79 orthorhombisch kristallisiert.



Die entsprechenden praparativen Verfahren fuhrten bei etwa 650°C zu ThNCl, ThNBr und ThNJ. Die Stoffe sind in dieser Reihenfolge zunehmend hydrolyseempfindlich, sie kristallisieren isotyp dem BiOCl.



ThNF has been prepared by ammonolysis of ThF4 in a current of ammonia at 850°C. The compound is resistant against moisture, it crystallizes in a rhombohedral layer type lattice, isotypic with LaOF. ThNF can also be prepared from Th3N4 and ThF4. This reaction also yields two further phases ThNxF4−3x. The phase with 0.94 ≥ x ≥ 0.88 is tetragonal, whereas the other one with 0.87 ≥ x ≥ 0.79 is orthorhombic.



The same methods yielded the compounds ThNCl, ThNBr, ThNJ at 650°C. The sensitivity against moisture increases in the same order. They crystallize isotypic with BiOCl.

Nitridhalogenide des Thoriums

The hafnium tetrafluoride-water system

This volume presents the solubility of inorganic compounds of actinides except for carbonates, which are included in Volume 74 of this series, and nitrates, which are covered in Volume 55 Also included are solubility data of compounds such as organosulfates, phosphates, and arsenates, which are not covered in Volume 74 The predominant part of this volume covers solubility data of thorium, uranium, neptunium, and plutonium compounds Fewer data have been published for americium compounds and very few for compounds of actinium, protactinium, and transamericium elements The literature has been covered up to the end of 2004 Documents which remained unavailable to the editor, and could not be included in the volume are listed in the Appendix For some compounds it was not possible to show the Chemical Abstracts registry numbers since these have not been assigned

R.W.M. D'Eye

Papers

The hydrates of thorium tetrafluoride