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Fabrication and Optimization of Type II Silicon Clathrate Films

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K(2)LaCl(5).

Christian M Schurz, Thomas Schleid, Gerd Meyer

Acta Crystallographica. Section E, Structure Reports Online

|May 19, 2011

Summary

This summary is machine-generated.

Dipotassium lanthanum penta-chloride, K(2)LaCl(5), exhibits a unique crystal structure. Its lanthanum cations are seven-coordinated, while potassium cations are eight-coordinated by chloride anions.

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Published on: January 12, 2010

Area of Science:

Inorganic Chemistry
Solid-State Chemistry
Crystallography

Background:

The study investigates the crystal structure of dipotassium lanthanum penta-chloride, K(2)LaCl(5).
This compound belongs to the A(2)MX(5) family of ternary halides, known for structural diversity among rare-earth metal compounds.

Purpose of the Study:

To determine and describe the detailed crystal structure of K(2)LaCl(5).
To compare its structural features with isotypic compounds and related ternary halides.

Main Methods:

Crystallographic analysis of dipotassium lanthanum penta-chloride.
Identification of cation coordination environments and anion positions within the crystal lattice.

Main Results:

K(2)LaCl(5) is isotypic with Y(2)HfS(5) and other A(2)MX(5) ternary halides.
Lanthanum (La(3+)) cations exhibit seven-fold coordination in monocapped trigonal prisms.
Potassium (K(+)) cations show eight-fold coordination, and chloride anions display varied coordination numbers and geometries.

Conclusions:

The crystal structure of K(2)LaCl(5) is elucidated, revealing specific coordination polyhedra for cations.
Structural insights contribute to understanding structure-property relationships in rare-earth metal halides.