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Synthesis and Crystal Structures of Cd(OH)Cl and Cu(OH)Cl and Relationship to Brucite Type

✍ Scribed by Y. Cudennec; A. Riou; Y. Gérault; A. Lecerf

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
325 KB
Volume
151
Category
Article
ISSN
0022-4596

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✦ Synopsis

Synthesis of single crystals of Cd(OH)Cl and Cu(OH)Cl allowed us to revise the structure of these hydroxychlorides and con5rm their space group: P6 3 mc (R ‫؍‬ 0.041; R w ‫؍‬ 0.050) for Cd(OH)Cl and P2 1 /c (R ‫؍‬ 0.051; R w ‫؍‬ 0.069) for Cu(OH)Cl. Positions of hydrogen atoms were determined and an hypothesis of hydrogen bonds is discussed in relation to the infrared spectra. A comparison of the structures shows that an isomorphism is not possible between the two compounds, due to the important Jahn+Teller e4ect of divalent copper. On the other hand, a structural relationship exists between Cd(OH)Cl and -Cd(OH) 2 , which belongs to the brucite-type family.

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