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Synthesis and crystallochemistry of Na4CrNi(PO4)3

Published online by Cambridge University Press:  06 March 2012

B. Manoun ,
A. El Jazouli ,
S. Krimi  and
A. Lachgar
B. Manoun*
Affiliation:
Laboratoire de Chimie des Matériaux Solides, Université Hassan II-Mohammédia, Faculté des Sciences Ben M’Sik, Casablanca, Morocco
A. El Jazouli
Affiliation:
Laboratoire de Chimie des Matériaux Solides, Université Hassan II-Mohammédia, Faculté des Sciences Ben M’Sik, Casablanca, Morocco
S. Krimi
Affiliation:
Laboratoire de Recherche sur la Physico-chimie de l’Etat Solide LARPES, Département de Chimie, Faculté des Sciences Ain Chock, Casablanca, Morocco
A. Lachgar
Affiliation:
Department of Chemistry, Wake Forest University, Winston-Salem, North Carolina 27109
*
a)Author to whom correspondence should be addressed; Electronic mail: [email protected]. Current address: Center for the Study of Matter at Extreme Conditions, U.P., VH-140, Miami, Florida 33199.
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Abstract

Na4CrNi(PO4)3 orthophosphate powder was prepared from acid solutions of NiO, Na2CO3 and aqueous solutions of Cr(NO3)3.9H2O, and (NH4)2HPO4 at a final temperature of 750 °C. The hexagonal unit cell parameters were determined to be ah≈8.789 Å and ch≈21.481 Å in space group R3¯c. These parameters were compared to those of Na4AA′(PO4)3 (AA′=CrMg, CrCo, TiNa, ZrNa). The linear variations of these parameters versus the mean A cation radius (rAA′) are consistent with the atomic distribution found for the structure of Na4NiCr(PO4)3. The ah and ch parameters are functions of the An+ ion size.

Keywords

crystallochemistryX-ray diffractionnasiconorthophosphateNa4CrNi(PO4)3
Type
Technical Articles
Information
Powder Diffraction , Volume 19 , Issue 2 , June 2004 , pp. 162 - 164
Copyright
Copyright © Cambridge University Press 2004

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