Syntheses, Structures, and Magnetic Properties of Metal (II) Phosphates wtth M(OH)(PO4)2- Layers (M = Ni, Co, Mg)

Inorganic Chemistry

Volumn 37, Issue 22, 1998, Pages 5844-5850

  Hamanaka, Nobuaki ^a   Imoto, Hideo ^a  

^a UNIVERSITY OF TOKYO   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0001749565     PISSN: 00201669     EISSN: None     Source Type: Journal    
DOI: 10.1021/ic980595n     Document Type: Article

References (27)

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23. The layer group is a set of the symmetry operations observed in a layer. It contains all point-group operations and translational operations along the two axes parallel to the layer. Therefore, the layer group is similar to the space group, but lacks the translational symmetry along the third axis. Vainshtein, B. K. Fundamentals of Crystals. Symmetry, and Methods of Structural Crystallography; Springer; Berlin, 1994; Section 2.7.4.
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26. After the sample 1 was heated at 206 °C, the cell parameters a, b, and c decreased by 0.6%, 0.4%, and 0.4%, respectively. The observed small decrease of the c parameter indicates that the interlayer distance is mainly determined by the interlayer O-O contacts and/or Na-O contacts. This indication is supported by a short contact of phosphate groups in the neighboring layers. The interlayer O(7x)-O(7y) distance is as short as 2.57 Å(Figure 1), and it is reasonable that the interlayer distance does not decrease explicitly even water molecules between the layers are removed.
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