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Lanthanum tetrazinc, LaZn4.

Igor Oshchapovsky¹, Volodymyr Pavlyuk, Grygoriy Dmytriv

¹Department of Inorganic Chemistry, Ivan Franko National University of Lviv, Kyryla i Mefodia Street 6, 79005 Lviv, Ukraine. romaniuk@ua.fm

Acta Crystallographica. Section C, Crystal Structure Communications

|June 7, 2012

Summary

The crystal structure of lanthanum tetrazinc (LaZn4) was determined for the first time using X-ray diffraction. This reveals a new structure type related to other intermetallic compounds with 18-vertex clusters.

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Preparation, Purification, and Characterization of Lanthanide Complexes for Use as Contrast Agents for Magnetic Resonance Imaging

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Published on: July 21, 2011

Area of Science:

Solid State Chemistry
Crystallography
Materials Science

Background:

Lanthanum tetrazinc (LaZn4) was discovered approximately 70 years ago.
Its precise crystal structure remained undetermined until this study.

Purpose of the Study:

To determine the crystal structure of lanthanum tetrazinc (LaZn4) for the first time.
To characterize its structural relationships with known intermetallic compounds.

Main Methods:

Single-crystal X-ray diffraction was employed to analyze the LaZn4 structure.
Symmetry and atomic site occupancies were determined.

Main Results:

The crystal structure of LaZn4 was solved, revealing a new structure type.
The compound crystallizes in the space group Cmcm.
LaZn4 exhibits close-packed arrangements of 18-vertex clusters (LaZn18), similar to related structure types.

Conclusions:

The first definitive crystal structure of LaZn4 is reported.
The new structure type provides insights into the packing of 18-vertex clusters in intermetallic compounds.
This finding contributes to understanding rare earth and alkaline earth metal compounds.