Inorganic Chemistry
Article
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result is a fully compensated antiferromagnet. Refinements of
the data recorded at higher temperatures (Table S7 and Figure
8) reveal that the same magnetic structure is valid up to TN. All
components decrease up to 5.3 K, the Mz component being
zero at this temperature and TN between 5.3 and 5.6 K, in
agreement with the susceptibility measurements, TN = 5.9 K.
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4. CONCLUSION
Five basic selenates, AM2(H3O2)(SeO4)2, exhibiting the
natrochalcite-type structure have been obtained by hydro-
thermal technique showing a tendency for higher stability when
the size ratio of M to A is small. For example, the synthesis of
the salt with the smaller A (Na) and the largest M (Mn),
NaMnH, has not been successful. All the compounds but
NaNi2(H3O2)(SeO4)2 order antiferromagnetically with an
upturn in magnetization in all cases at higher field suggesting
either metamagnetism or spin-flop. The magnetic structures of
NaCoD and KCoD are different from each other: the first one
with ferromagnetic order within the edge-sharing cobalt chains,
the second one with AF order within the chains. In relation to
previously reported magnetic structures of this family of salts,
this result appears to be related to the propagation vector,
ferromagnetic coupling for k = (0,0,0) and antiferromagnetic
coupling for k ≠ (0,0,0) which is verified for the seven magnetic
structures known up to now for natrochalcite compounds. All
seven known magnetic structures are surprisingly different from
each other.
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Mhiri, T.; Kurmoo, M. Chem. Commun. 2004, 2548. (b) Ben Salah,
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G.;
ASSOCIATED CONTENT
■
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S
* Supporting Information
X-ray crystallographic information file in CIF format; photo of
the crystals; DT-TGA in air; infrared spectra; LeBail pattern
matching fits of PXRD; susceptibility measured on cooling in
different magnetic fields. This material is available free of charge
(14) (a) Vilminot, S.; Andre,
Blundell, S. J.; Kurmoo, M. J. Am. Chem. Soc. 2008, 130, 13490.
(b) Maalej, W.; Vilminot, S.; Andre, G.; Damay, F.; Elaoud, Z.; Mhiri,
T.; Kurmoo, M. Inorg. Chem. 2011, 50, 3286. (c) Maalej, W.; Vilminot,
S.; Andre, Elaoud, Z.; Mhiri, T.; Kurmoo, M. Inorg. Chem. 2011, 50,
9191.
́ ́
G.; Bouree-Vigneron, F.; Baker, P. J.;
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AUTHOR INFORMATION
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Corresponding Author
(M.K.).
Am. J. Sci. 1939, 237, 451. (c) Palache, C.; Berman, H.; Frondel, C.
The System of Mineralogy of James Dwight Dana and Edward Salisbury
Dana, Yale University, 7th ed.; John Wiley and Sons, Inc.: New York,
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ACKNOWLEDGMENTS
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(16) (a) Rumanova, I. M.; Volodina, G. F. Doklady Acad. Nauk SSSR
1958, 123, 78. in Russian (b) Pezerat, H. CR Acad. Sci. Paris 1965,
This work was supported by the CNRS (France), CEA
(France), and the Universite
́
de Strasbourg (France). W.M.
261, 5490. (c) Pezerat, H.; Mantin, I.; Kovacevic, S. C.R. Hebd. Sea
Acad. Sci., Ser. C 1966, 263, 60. (d) Pezerat, H. Bull. Soc. Fr. Miner
Cristallogr. 1967, 90, 549. (e) Pezerat, H. C.R. Hebd. Seances Acad. Sci.,
́
nces
thanks the Universite
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SFax (Tunisia) for a fellowship.
́
al.
́
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dx.doi.org/10.1021/ic202273e | Inorg. Chem. 2012, 51, 1953−1962