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Synthesis and crystal structure of (Ag,Pd)22Se6

Published online by Cambridge University Press:  13 March 2013

F. Laufek ,
A. Vymazalová ,
D.A. Chareev ,
A.V. Kristavchuk ,
J. Drahokoupil  and
M.V. Voronin
F. Laufek*
Affiliation:
Czech Geological Survey, Geologická 6, 152 00 Praha 5, Czech Republic
A. Vymazalová
Affiliation:
Czech Geological Survey, Geologická 6, 152 00 Praha 5, Czech Republic
D.A. Chareev
Affiliation:
Institute of Experimental Mineralogy RAS, Chernogolovka, Moscow region, 142432Russia
A.V. Kristavchuk
Affiliation:
Institute of Experimental Mineralogy RAS, Chernogolovka, Moscow region, 142432Russia University of Dubna, Universitetskaja 19, Dubna 141 980, Russia
J. Drahokoupil
Affiliation:
Institute of Physics, ASCR v.v.i., Na Slovance 2, 182 21 Prague 8, Czech Republic
M.V. Voronin
Affiliation:
Institute of Experimental Mineralogy RAS, Chernogolovka, Moscow region, 142432Russia
*
a)Author to whom correspondence should be addressed. Electronic mail: frantisek.laufek@geology.cz
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Abstract

The (Ag,Pd)22Se6 phase was synthesized from individual elements by silica glass tube technique and structurally characterized from powder X-ray diffraction data. The (Ag,Pd)22Se6 phase crystallizes in Fm$\overline3$m symmetry, unit-cell parameters: a = 12.3169(2) Å, V = 1862.55(5) Å3, Z = 4, and Dc = 10.01 g/cm3. The crystal structure of the (Ag,Pd)22Se6 phase represents a stuffed 3a.3a.3a superstructure of the Pd structure (fcc), where only 4 from 108 available octahedral holes are occupied. Its crystal structure is related to the Cr23C6 structure type.

Keywords

(Ag,Pd)22Se6Rietveld refinementcrystal structureAg–Pd–Se systemX-ray powder diffraction data
Type
Technical Articles
Information
Powder Diffraction , Volume 28 , Issue 1 , March 2013 , pp. 13 - 17
Copyright
Copyright © International Centre for Diffraction Data 2013 

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