Zirconim monobromide, a second double metal sheet structure. Some physical and chemical properties of the metallic zirconium monochloride and monobromide

Journal Article · Mon Aug 01 04:00:00 EDT 1977 · Inorg. Chem.; (United States)

DOI:https://doi.org/10.1021/ic50174a041· OSTI ID:7078228

Daake, R L; Corbett, J D

Zirconium monobromide has been synthesized and shown from Guinier x-ray powder diffraction data to contain the same X--Zr--Zr--X slabs of four close-packed layers known in ZrCl but with an alternate packing of the four-layer slabs (ACB rather than ABC); R = 0.16 for 50 hkl reflections; a = 3.5031 (3) and c = 28.071 (3) A for the trigonal cell R3m. HfCl also occurs in the ZrBr structure; a = 3.3697 (3) and c = 26.582 (6) A. The greater hardness of ZrBr, the absence of the graphitelike structural damage which ZrCl exhibits after grinding, and the relative distances in the two structures all appear to be manifestations of significantly stronger interslab binding in ZrBr. This is attributed to the presence of close, second nearest neighbor interactions between Br and Zr layers of the same orientation in adjoining slabs. The metallic character of both phases is clearly established by their x-ray photoelectron spectra, namely, the presence of a substantial density of occupied states at the Fermi level. Attempted intercalation reactions were unsuccessful for both phases.

• Research Organization: Ames Lab., IA
• OSTI ID: 7078228
• Journal Information: Inorg. Chem.; (United States), Journal Name: Inorg. Chem.; (United States) Vol. 16:8; ISSN INOCA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
BROMIDES
BROMINE COMPOUNDS
CHEMICAL PREPARATION
CHLORIDES
CHLORINE COMPOUNDS
CRYSTAL STRUCTURE
HALIDES
HALOGEN COMPOUNDS
PHYSICAL PROPERTIES
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM BROMIDES
ZIRCONIUM CHLORIDES
ZIRCONIUM COMPOUNDS